Malware Analysis Report

2024-10-16 03:26

Sample ID 240908-rntphssgre
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: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

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 (10418) files with added filename extension

Modifies boot configuration data using bcdedit

Renames multiple (5796) files with added filename extension

Deletes shadow copies

Enumerates connected drives

Drops desktop.ini file(s)

Sets desktop wallpaper using registry

Drops file in Program Files directory

System Location Discovery: System Language Discovery

Unsigned PE

Command and Scripting Interpreter: PowerShell

Suspicious use of AdjustPrivilegeToken

Interacts with shadow copies

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

Uses Volume Shadow Copy service COM API

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-08 14:20

Signatures

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-08 14:20

Reported

2024-09-08 14:21

Platform

win10v2004-20240802-en

Max time kernel

10s

Max time network

50s

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 (5796) files with added filename extension

ransomware

Enumerates connected drives

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

Drops file in Program Files directory

Description Indicator Process Target
File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\LinkedInboxSmallTile.scale-125.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\app\dev\nls\sl-si\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\bg3_thumb.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\Tracker\pdf.gif C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Common Files\System\msadc\en-US\msdaprsr.dll.mui C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\plug_ins\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\rsod\dcf.x-none.msi.16.x-none.tree.dat 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\identity_proxy\internal.identity_helper.exe.manifest C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files\VideoLAN\VLC\lua\playlist\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\plugins\ob-preview\js\nls\es-es\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\on-boarding\images\themeless\zh-cn_get.svg C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Mozilla Firefox\browser\features\[email protected] 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\Trust Protection Lists\Mu\TransparentAdvertisers.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\signatures\images\themes\dark\s_filter_18.svg 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_link_18.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\EmptyCalendarSearch-Dark.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-black\GenericMailBadge.scale-400.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files (x86)\Common Files\Adobe\Reader\DC\Linguistics\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\files\dev\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\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\contrast-white\HxCalendarMediumTile.scale-100.png 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 created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\tracked-send\js\plugins\tracked-send\js\nls\sl-si\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\EmptySearch.scale-125.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\scan-files\images\themeless\Playstore\zh-cn_get.svg 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\combinepdf\js\plugin.js C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files\WindowsPowerShell\Modules\PackageManagement\1.0.0.1\es\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\HxA-Google.scale-125.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX86\Microsoft Shared\Web Server Extensions\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\plugins\signatures\js\nls\it-it\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\sign-services-auth\js\nls\ca-es\ui-strings.js C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX86\Microsoft Office\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\js\nls\eu-es\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\OutlookMailMediumTile.scale-400.png 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\generic-rhp-app\images\themes\dark\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\plugins\combinepdf\js\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\themes\dark\next-arrow-disabled.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\HxA-Yahoo-Light.scale-100.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\WindowsPowerShell\Modules\PackageManagement\1.0.0.1\DSCResources\MSFT_PackageManagementSource\es-ES\MSFT_PackageManagementSource.strings.psd1 C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Windows Media Player\en-US\setup_wm.exe.mui 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\win8-scrollbar\themes\dark\arrow-right.gif C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\file_types\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\unified-share\images\themes\dark\CompleteCheckmark2x.png 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\digsig\js\nls\es-es\GET_YOUR_FILES_BACK.txt C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Common Files\Adobe\Reader\DC\Linguistics\Providers\Plugins2\AdobeHunspellPlugin\Dictionaries\en_GB\hyph_en_GB.dic 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\Office365LogoWLockup.scale-140.png 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\add-account\images\themes\dark\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-white\HxCalendarAppList.targetsize-64_altform-unplated.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Microsoft Office\root\Office16\PROOF\MSSP7EN.dub 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\on-boarding\images\themeless\Download_on_the_App_Store_Badge_cs_135x40.svg 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\generic-rhp-app\images\example_icons2x.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\ja-jp\ui-strings.js C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Microsoft Office\root\rsod\officemuiset.msi.16.en-us.tree.dat C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Common Files\Adobe\Reader\DC\Linguistics\Providers\Plugins2\AdobeHunspellPlugin\Abbreviations\en_GB\List.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\plugins\search-summary\js\nls\ca-es\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-white\HxCalendarAppList.targetsize-16.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Windows Media Player\Skins\Revert.wmz C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files\VideoLAN\VLC\plugins\access_output\GET_YOUR_FILES_BACK.txt C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\WindowsPowerShell\Modules\PackageManagement\1.0.0.1\DSCResources\MSFT_PackageManagement\fr-FR\MSFT_PackageManagement.schema.mfl C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files (x86)\Google\Update\Download\GET_YOUR_FILES_BACK.txt C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Common Files\Adobe\Reader\DC\Linguistics\Providers\Plugins2\AdobeHunspellPlugin\Dictionaries\en_GB\affDescription.txt C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000018\cardview\lib\native-common\assets\[email protected] 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\add-account\js\nls\pl-pl\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\Tracker\create_form.gif C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files\VideoLAN\VLC\locale\el\LC_MESSAGES\GET_YOUR_FILES_BACK.txt 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: 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: 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: 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 2328 wrote to memory of 2768 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\SYSTEM32\cmd.exe
PID 2328 wrote to memory of 2768 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\SYSTEM32\cmd.exe
PID 2328 wrote to memory of 556 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\SYSTEM32\cmd.exe
PID 2328 wrote to memory of 556 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\SYSTEM32\cmd.exe
PID 2328 wrote to memory of 3260 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\SYSTEM32\cmd.exe
PID 2328 wrote to memory of 3260 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\SYSTEM32\cmd.exe
PID 2328 wrote to memory of 2700 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\SYSTEM32\cmd.exe
PID 2328 wrote to memory of 2700 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\SYSTEM32\cmd.exe
PID 2328 wrote to memory of 1704 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\SYSTEM32\cmd.exe
PID 2328 wrote to memory of 1704 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\SYSTEM32\cmd.exe
PID 556 wrote to memory of 34696 N/A C:\Windows\SYSTEM32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 556 wrote to memory of 34696 N/A C:\Windows\SYSTEM32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 3260 wrote to memory of 34704 N/A C:\Windows\SYSTEM32\cmd.exe C:\Windows\system32\bcdedit.exe
PID 3260 wrote to memory of 34704 N/A C:\Windows\SYSTEM32\cmd.exe C:\Windows\system32\bcdedit.exe
PID 2700 wrote to memory of 34712 N/A C:\Windows\SYSTEM32\cmd.exe C:\Windows\system32\bcdedit.exe
PID 2700 wrote to memory of 34712 N/A C:\Windows\SYSTEM32\cmd.exe C:\Windows\system32\bcdedit.exe
PID 1704 wrote to memory of 28360 N/A C:\Windows\SYSTEM32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1704 wrote to memory of 28360 N/A C:\Windows\SYSTEM32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2768 wrote to memory of 28380 N/A C:\Windows\SYSTEM32\cmd.exe C:\Windows\System32\Wbem\WMIC.exe
PID 2768 wrote to memory of 28380 N/A C:\Windows\SYSTEM32\cmd.exe C:\Windows\System32\Wbem\WMIC.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\bcdedit.exe

bcdedit /set {default} recoveryenabled No

C:\Windows\system32\bcdedit.exe

bcdedit /set {default} bootstatuspolicy ignoreallfailures

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\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\1612282760.png /f

C:\Windows\system32\rundll32.exe

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 0.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp

Files

C:\GET_YOUR_FILES_BACK.txt

MD5 01188d22b1675e3437b1418e14f4ffab
SHA1 6e7127f3bbfce49485ed8f1acf8f697bcb952818
SHA256 e4b3ac00a0b2eb195b26abffbc4368077384e73393e51605edda17dae05ab7f2
SHA512 6903ae3247f32ad79c60a2062cd6a7bdbf5a7c9db1bdc43bdbef4da3396945014d30968ea4c8531a2d0c7b695f1ea36e2b8c51bb39cc6157c4096ac04a6e187d

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1ttoaxbd.jwb.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/28360-12349-0x000002617DC80000-0x000002617DCA2000-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

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-08 14:20

Reported

2024-09-08 14:23

Platform

win7-20240903-en

Max time kernel

119s

Max time network

123s

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 (10418) 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-1-5-21-1488793075-819845221-1497111674-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\1882079261.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\Windows Sidebar\Gadgets\Calendar.Gadget\images\bNext-hot.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\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 (x86)\Adobe\Reader 9.0\Reader\plug_ins\VDKHome\ENU\VDK10.STP C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Windows Sidebar\Gadgets\Calendar.Gadget\images\calendar_ring_docked.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\PE03339_.WMF C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Java\jre7\lib\zi\Etc\GMT-11 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.e4.rcp_1.3.100.v20141007-2033\epl-v10.html C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Windows Sidebar\Gadgets\Weather.Gadget\images\docked_blue_partly-cloudy.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files (x86)\Microsoft Office\Office14\Groove\Certificates\groove.net\ManagedObjects\GET_YOUR_FILES_BACK.txt C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files\Windows Photo Viewer\en-US\GET_YOUR_FILES_BACK.txt C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\7-Zip\Lang\tr.txt C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Windows Photo Viewer\es-ES\PhotoViewer.dll.mui C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\1033\PUBFTSCM\SCHEME22.CSS C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\WB01245_.GIF C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Windows Sidebar\Gadgets\Weather.Gadget\images\144DPI\(144DPI)greenStateIcon.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\1033\ACCESS12.ACC C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\1033\PUBSPAPR\ZPDIR46F.GIF C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\RECYCLE.WMF C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Adobe\Reader 9.0\Reader\plug_ins\Annots.api C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Windows Media Player\es-ES\WMPMediaSharing.dll.mui C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\PUBWIZ\CONTACTINFOBB.POC C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\Document Themes 14\Executive.thmx C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\AG00164_.GIF 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\images\winClassicHandle.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Windows Sidebar\Gadgets\CPU.Gadget\images\back.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Windows Sidebar\Gadgets\RSSFeeds.Gadget\de-DE\css\flyout.css C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Windows Sidebar\Gadgets\Calendar.Gadget\it-IT\gadget.xml C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Windows NT\Accessories\ja-JP\wordpad.exe.mui C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\Templates\1033\Access\WSS\1100.accdt C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\FORMS\1033\RSSITEM.CFG C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\FD02161_.WMF C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\PH03143I.JPG C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Windows Sidebar\Gadgets\Weather.Gadget\ja-JP\css\weather.css C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Windows Sidebar\Gadgets\Clock.Gadget\images\settings_box_top.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Windows Media Player\de-DE\WMPDMCCore.dll.mui C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\visualvm\config\Modules\org-netbeans-modules-templates.xml_hidden 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\Etc\UTC C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\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\Java\jdk1.7.0_80\lib\visualvm\visualvm\modules\com-sun-tools-visualvm-heapdump.jar C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Common Files\microsoft shared\THEMES14\BLENDS\BLENDS.INF C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files\VideoLAN\VLC\locale\zh_TW\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\jre7\lib\zi\Etc\GMT+3 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-editor-mimelookup-impl.xml C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\EN00319_.WMF C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\SO00177_.WMF C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Common Files\microsoft shared\THEMES14\STUDIO\STUDIO.INF C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Common Files\microsoft shared\THEMES14\CANYON\CANYON.ELM C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Windows Sidebar\Gadgets\PicturePuzzle.Gadget\Images\timer_over.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0107482.WMF C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\visualvm\modules\locale\com-sun-tools-visualvm-modules-appui_ja.jar C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\visualvm\config\Modules\com-sun-tools-visualvm-profiler.xml 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\modules\locale\org-openide-loaders_ja.jar 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.services.nl_zh_4.4.0.v20140623020002.jar 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\Pacific\Majuro C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Windows Sidebar\Gadgets\Clock.Gadget\en-US\css\clock.css 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\GrooveForms4\FormsStyles\BrightOrange\TAB_OFF.GIF C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\PE02270_.WMF C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\TN00255_.WMF C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Common Files\microsoft shared\ink\de-DE\mip.exe.mui C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files\Windows Journal\GET_YOUR_FILES_BACK.txt C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files\DVD Maker\Shared\DvdStyles\Performance\Perf_Scenes_Subpicture1.png C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Windows Media Player\de-DE\WMPDMCCore.dll.mui C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Office\MEDIA\CAGCAT10\J0205582.WMF C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe N/A
File created C:\Program Files (x86)\Common Files\System\Ole DB\it-IT\GET_YOUR_FILES_BACK.txt 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 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 1036 wrote to memory of 2160 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1036 wrote to memory of 2160 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1036 wrote to memory of 2160 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1036 wrote to memory of 2160 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1036 wrote to memory of 2800 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1036 wrote to memory of 2800 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1036 wrote to memory of 2800 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1036 wrote to memory of 2800 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1036 wrote to memory of 2816 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1036 wrote to memory of 2816 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1036 wrote to memory of 2816 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1036 wrote to memory of 2816 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1036 wrote to memory of 2844 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1036 wrote to memory of 2844 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1036 wrote to memory of 2844 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1036 wrote to memory of 2844 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1036 wrote to memory of 2856 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1036 wrote to memory of 2856 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1036 wrote to memory of 2856 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 1036 wrote to memory of 2856 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\system32\cmd.exe
PID 2160 wrote to memory of 1812 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\Wbem\WMIC.exe
PID 2160 wrote to memory of 1812 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\Wbem\WMIC.exe
PID 2160 wrote to memory of 1812 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\Wbem\WMIC.exe
PID 2856 wrote to memory of 1792 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2856 wrote to memory of 1792 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2856 wrote to memory of 1792 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2800 wrote to memory of 1708 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 2800 wrote to memory of 1708 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 2800 wrote to memory of 1708 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 2816 wrote to memory of 3036 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\bcdedit.exe
PID 2816 wrote to memory of 3036 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\bcdedit.exe
PID 2816 wrote to memory of 3036 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\bcdedit.exe
PID 2844 wrote to memory of 2212 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\bcdedit.exe
PID 2844 wrote to memory of 2212 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\bcdedit.exe
PID 2844 wrote to memory of 2212 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\bcdedit.exe
PID 1036 wrote to memory of 4196 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1036 wrote to memory of 4196 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1036 wrote to memory of 4196 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1036 wrote to memory of 4196 N/A C:\Users\Admin\AppData\Local\Temp\AvosLocker.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4196 wrote to memory of 444 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\reg.exe
PID 4196 wrote to memory of 444 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\reg.exe
PID 4196 wrote to memory of 444 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\reg.exe
PID 4196 wrote to memory of 5112 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\rundll32.exe
PID 4196 wrote to memory of 5112 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\rundll32.exe
PID 4196 wrote to memory of 5112 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\Wbem\WMIC.exe

wmic shadowcopy delete /nointeractive

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} recoveryenabled No

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\1882079261.png /f

C:\Windows\system32\rundll32.exe

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

Network

N/A

Files

C:\Users\GET_YOUR_FILES_BACK.txt

MD5 01188d22b1675e3437b1418e14f4ffab
SHA1 6e7127f3bbfce49485ed8f1acf8f697bcb952818
SHA256 e4b3ac00a0b2eb195b26abffbc4368077384e73393e51605edda17dae05ab7f2
SHA512 6903ae3247f32ad79c60a2062cd6a7bdbf5a7c9db1bdc43bdbef4da3396945014d30968ea4c8531a2d0c7b695f1ea36e2b8c51bb39cc6157c4096ac04a6e187d

memory/1792-1118-0x000000001B6F0000-0x000000001B9D2000-memory.dmp

memory/1792-1170-0x0000000001EF0000-0x0000000001EF8000-memory.dmp

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

MD5 1be5c83cfe6067d91b6a1f1ce121f259
SHA1 cfaace668afef85fe2566ac4ff05ef8e4cbc2de3
SHA256 ee6fb1847562eae19e1630bb450350e6380b98b32da63591058cb841a44e5e49
SHA512 c9e58760852db5b545eae0761a5ac26da17f3516312b703ad32d9bad2029ff4bfebce9da326a26b314e9aa142d2fc16d7425d80678a1a7813a028206e9150be3

memory/4196-24583-0x000000001B760000-0x000000001BA42000-memory.dmp

memory/4196-24584-0x0000000001F70000-0x0000000001F78000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\1882079261.png

MD5 3c448ddcee1b63f8aae7d952e5061bdc
SHA1 3163bc4036c9068a56664179b9a0db0bbbce339e
SHA256 ae6bd768e8208c7bd88184f51087c60069345142f7baa779a300b8d366ddc89f
SHA512 5ae3644d243c4f347097dafbd6ffe97e26b85343e8264b2a0f7b099b3f181dc2e9a1c2b572f173a953117a44c055e26cd63025e9d2f2ffe6e3ec408ccb79a58b