avoslocker | 0f7435ed7290b7420751fcfa079c97ddd2901e79964e8f8f3760d31d8ed6b15a

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
29-12-2024 05:08

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General

Target

test.exe
Size

1.6MB
MD5

96323388726116da0c93a29df8dcc787
SHA1

2692c6ed2d4d7b6c03fa4b044cae212dd86914ce
SHA256

0f7435ed7290b7420751fcfa079c97ddd2901e79964e8f8f3760d31d8ed6b15a
SHA512

7304c8868d397742970c06fe9967aabc173c12837478316436969e01b646da791cd51edb59db4e1b9e704beedb46035d67530127f05c0f9212a1d3b2f05e0274
SSDEEP

24576:HImw98okVgela0as5CqLVO7XJCjkD3N0HRADV0aEhbHdn0TrldepPZ:hL5ljasaU4eaEhDF

Score

10^/10

avoslocker defense_evasion discovery evasion execution impact ransomware upx

Malware Config

Signatures

Avoslocker Ransomware
Avoslocker is a relatively new ransomware, that was observed in late June and early July, 2021.
ransomware avoslocker
Avoslocker family
avoslocker
Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware defense_evasion impact execution

File Deletion
T1070.004

Inhibit System Recovery
T1490

Windows Management Instrumentation
T1047

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
2848	bcdedit.exe
2420	bcdedit.exe

Renames multiple (10397) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

Executes dropped EXE 2 IoCs

pid	Process
2364	hack.exe
588	Firefox Installer.exe

Drops desktop.ini file(s) 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\1033\DataServices\DESKTOP.INI	hack.exe

Enumerates connected drives 3 TTPs 1 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\Z:	hack.exe

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\953701564.png"	reg.exe

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/files/0x000a0000000122d0-10.dat	upx
behavioral1/memory/588-11-0x0000000000400000-0x0000000000446000-memory.dmp	upx
behavioral1/memory/588-13-0x0000000000400000-0x0000000000446000-memory.dmp	upx

Drops file in Program Files directory 64 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Common Files\microsoft shared\ink\en-US\micaut.dll.mui	hack.exe
File opened for modification	C:\Program Files\Windows Sidebar\Gadgets\Currency.Gadget\it-IT\js\init.js	hack.exe
File opened for modification	C:\Program Files\Windows Sidebar\Gadgets\Clock.Gadget\images\square_s.png	hack.exe
File opened for modification	C:\Program Files\Java\jre7\lib\zi\America\Metlakatla	hack.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\org.eclipse.equinox.p2.ui.sdk.scheduler.nl_ja_4.4.0.v20140623020002.jar	hack.exe
File created	C:\Program Files (x86)\Windows NT\Accessories\it-IT\GET_YOUR_FILES_BACK.txt	hack.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0174315.WMF	hack.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0178932.JPG	hack.exe
File created	C:\Program Files\Windows Sidebar\Gadgets\Calendar.Gadget\ja-JP\css\GET_YOUR_FILES_BACK.txt	hack.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Etc\GMT-1	hack.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveForms\FormsHomePage.html	hack.exe
File opened for modification	C:\Program Files (x86)\Common Files\System\ado\adovbs.inc	hack.exe
File opened for modification	C:\Program Files\Windows Sidebar\Gadgets\RSSFeeds.Gadget\es-ES\RSSFeeds.html	hack.exe
File created	C:\Program Files\Microsoft Games\Multiplayer\Checkers\es-ES\GET_YOUR_FILES_BACK.txt	hack.exe
File created	C:\Program Files\Java\jre7\lib\cmm\GET_YOUR_FILES_BACK.txt	hack.exe
File created	C:\Program Files\Common Files\Microsoft Shared\ink\lv-LV\GET_YOUR_FILES_BACK.txt	hack.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\NA00798_.WMF	hack.exe
File opened for modification	C:\Program Files\SendCompress.7z	hack.exe
File created	C:\Program Files\Reference Assemblies\Microsoft\Framework\v3.5\ja\GET_YOUR_FILES_BACK.txt	hack.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\SO00704_.WMF	hack.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\PUBWIZ\MENU.XML	hack.exe
File created	C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveForms3\FormsStyles\GET_YOUR_FILES_BACK.txt	hack.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\SO00670_.WMF	hack.exe
File opened for modification	C:\Program Files\Windows Sidebar\Gadgets\Clock.Gadget\images\cronometer_m.png	hack.exe
File created	C:\Program Files\Microsoft Games\Multiplayer\Spades\it-IT\GET_YOUR_FILES_BACK.txt	hack.exe
File created	C:\Program Files (x86)\Windows Sidebar\Gadgets\PicturePuzzle.Gadget\GET_YOUR_FILES_BACK.txt	hack.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\1033\PUBSPAPR\PDIR4B.GIF	hack.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\VCTRN_01.MID	hack.exe
File created	C:\Program Files\Windows Photo Viewer\ja-JP\GET_YOUR_FILES_BACK.txt	hack.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\America\Yakutat	hack.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\BORDERS\MSART2.BDR	hack.exe
File opened for modification	C:\Program Files (x86)\Common Files\microsoft shared\Stationery\Green Bubbles.htm	hack.exe
File opened for modification	C:\Program Files\Windows Sidebar\Gadgets\Calendar.Gadget\icon.png	hack.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\SO00199_.WMF	hack.exe
File opened for modification	C:\Program Files (x86)\Common Files\System\Ole DB\es-ES\sqlxmlx.rll.mui	hack.exe
File created	C:\Program Files (x86)\Common Files\microsoft shared\Smart Tag\GET_YOUR_FILES_BACK.txt	hack.exe
File opened for modification	C:\Program Files\Java\jre7\lib\zi\America\Indiana\Vincennes	hack.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\modules\locale\org-netbeans-core-execution_zh_CN.jar	hack.exe
File opened for modification	C:\Program Files (x86)\Windows Sidebar\Gadgets\CPU.Gadget\it-IT\css\cpu.css	hack.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\PUBWIZ\DGPUNCT.DPV	hack.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveForms4\bg_TexturedBlue.gif	hack.exe
File created	C:\Program Files (x86)\Windows Sidebar\Gadgets\CPU.Gadget\en-US\GET_YOUR_FILES_BACK.txt	hack.exe
File opened for modification	C:\Program Files\VideoLAN\VLC\COPYING.txt	hack.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\org.eclipse.core.filesystem_1.4.100.v20140514-1614.jar	hack.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\America\Iqaluit	hack.exe
File opened for modification	C:\Program Files\Google\Chrome\Application\106.0.5249.119\Locales\es.pak	hack.exe
File opened for modification	C:\Program Files (x86)\Windows Sidebar\ja-JP\Sidebar.exe.mui	hack.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\DD01163_.WMF	hack.exe
File created	C:\Program Files (x86)\Adobe\Reader 9.0\GET_YOUR_FILES_BACK.txt	hack.exe
File created	C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\visualvm\core\GET_YOUR_FILES_BACK.txt	hack.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\com.jrockit.mc.browser.zh_CN_5.5.0.165303.jar	hack.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\org.eclipse.e4.ui.workbench3_0.12.0.v20140227-2118.jar	hack.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\BS00135_.WMF	hack.exe
File opened for modification	C:\Program Files (x86)\Adobe\Reader 9.0\Reader\plug_ins\DVA.api	hack.exe
File opened for modification	C:\Program Files\Windows Sidebar\Gadgets\Weather.Gadget\fr-FR\settings.html	hack.exe
File opened for modification	C:\Program Files (x86)\Windows Sidebar\Gadgets\Clock.Gadget\de-DE\css\clock.css	hack.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\AG00129_.GIF	hack.exe
File opened for modification	C:\Program Files\Windows Sidebar\Gadgets\RSSFeeds.Gadget\es-ES\js\settings.js	hack.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\AG00171_.GIF	hack.exe
File created	C:\Program Files (x86)\Common Files\microsoft shared\TRANSLAT\ENFR\GET_YOUR_FILES_BACK.txt	hack.exe
File opened for modification	C:\Program Files (x86)\Adobe\Reader 9.0\Reader\Optional\README.TXT	hack.exe
File opened for modification	C:\Program Files\Windows Media Player\it-IT\wmlaunch.exe.mui	hack.exe
File opened for modification	C:\Program Files\VideoLAN\VLC\locale\ru\LC_MESSAGES\vlc.mo	hack.exe
File created	C:\Program Files (x86)\Windows Sidebar\Gadgets\SlideShow.Gadget\it-IT\css\GET_YOUR_FILES_BACK.txt	hack.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2176	powershell.exe
544	powershell.exe

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Firefox Installer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	hack.exe

Interacts with shadow copies 3 TTPs 1 IoCs

Shadow copies are often targeted by ransomware to inhibit system recovery.

ransomware

File Deletion

T1070.004

Inhibit System Recovery

T1490

Direct Volume Access

T1006

pid	Process
3592	vssadmin.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2364	hack.exe
2176	powershell.exe
544	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeTakeOwnershipPrivilege	2364	hack.exe
Token: SeDebugPrivilege	2176	powershell.exe
Token: SeBackupPrivilege	2176	powershell.exe
Token: SeSecurityPrivilege	2176	powershell.exe
Token: SeIncreaseQuotaPrivilege	2736	WMIC.exe
Token: SeSecurityPrivilege	2736	WMIC.exe
Token: SeTakeOwnershipPrivilege	2736	WMIC.exe
Token: SeLoadDriverPrivilege	2736	WMIC.exe
Token: SeSystemProfilePrivilege	2736	WMIC.exe
Token: SeSystemtimePrivilege	2736	WMIC.exe
Token: SeProfSingleProcessPrivilege	2736	WMIC.exe
Token: SeIncBasePriorityPrivilege	2736	WMIC.exe
Token: SeCreatePagefilePrivilege	2736	WMIC.exe
Token: SeBackupPrivilege	2736	WMIC.exe
Token: SeRestorePrivilege	2736	WMIC.exe
Token: SeShutdownPrivilege	2736	WMIC.exe
Token: SeDebugPrivilege	2736	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2736	WMIC.exe
Token: SeRemoteShutdownPrivilege	2736	WMIC.exe
Token: SeUndockPrivilege	2736	WMIC.exe
Token: SeManageVolumePrivilege	2736	WMIC.exe
Token: 33	2736	WMIC.exe
Token: 34	2736	WMIC.exe
Token: 35	2736	WMIC.exe
Token: SeBackupPrivilege	2176	powershell.exe
Token: SeBackupPrivilege	2176	powershell.exe
Token: SeSecurityPrivilege	2176	powershell.exe
Token: SeBackupPrivilege	2176	powershell.exe
Token: SeBackupPrivilege	2176	powershell.exe
Token: SeSecurityPrivilege	2176	powershell.exe
Token: SeBackupPrivilege	2176	powershell.exe
Token: SeBackupPrivilege	2176	powershell.exe
Token: SeSecurityPrivilege	2176	powershell.exe
Token: SeBackupPrivilege	2176	powershell.exe
Token: SeBackupPrivilege	2176	powershell.exe
Token: SeSecurityPrivilege	2176	powershell.exe
Token: SeBackupPrivilege	2176	powershell.exe
Token: SeBackupPrivilege	2176	powershell.exe
Token: SeSecurityPrivilege	2176	powershell.exe
Token: SeIncreaseQuotaPrivilege	2736	WMIC.exe
Token: SeSecurityPrivilege	2736	WMIC.exe
Token: SeTakeOwnershipPrivilege	2736	WMIC.exe
Token: SeLoadDriverPrivilege	2736	WMIC.exe
Token: SeSystemProfilePrivilege	2736	WMIC.exe
Token: SeSystemtimePrivilege	2736	WMIC.exe
Token: SeProfSingleProcessPrivilege	2736	WMIC.exe
Token: SeIncBasePriorityPrivilege	2736	WMIC.exe
Token: SeCreatePagefilePrivilege	2736	WMIC.exe
Token: SeBackupPrivilege	2736	WMIC.exe
Token: SeRestorePrivilege	2736	WMIC.exe
Token: SeShutdownPrivilege	2736	WMIC.exe
Token: SeDebugPrivilege	2736	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2736	WMIC.exe
Token: SeRemoteShutdownPrivilege	2736	WMIC.exe
Token: SeUndockPrivilege	2736	WMIC.exe
Token: SeManageVolumePrivilege	2736	WMIC.exe
Token: 33	2736	WMIC.exe
Token: 34	2736	WMIC.exe
Token: 35	2736	WMIC.exe
Token: SeBackupPrivilege	2176	powershell.exe
Token: SeSecurityPrivilege	2176	powershell.exe
Token: SeBackupPrivilege	2176	powershell.exe
Token: SeSecurityPrivilege	2176	powershell.exe
Token: SeBackupPrivilege	1388	vssvc.exe

Suspicious use of WriteProcessMemory 56 IoCs

description	pid	Process	procid_target
PID 2136 wrote to memory of 2364	2136	test.exe	30
PID 2136 wrote to memory of 2364	2136	test.exe	30
PID 2136 wrote to memory of 2364	2136	test.exe	30
PID 2136 wrote to memory of 2364	2136	test.exe	30
PID 2136 wrote to memory of 588	2136	test.exe	31
PID 2136 wrote to memory of 588	2136	test.exe	31
PID 2136 wrote to memory of 588	2136	test.exe	31
PID 2136 wrote to memory of 588	2136	test.exe	31
PID 2136 wrote to memory of 588	2136	test.exe	31
PID 2136 wrote to memory of 588	2136	test.exe	31
PID 2136 wrote to memory of 588	2136	test.exe	31
PID 2364 wrote to memory of 2952	2364	hack.exe	33
PID 2364 wrote to memory of 2952	2364	hack.exe	33
PID 2364 wrote to memory of 2952	2364	hack.exe	33
PID 2364 wrote to memory of 2952	2364	hack.exe	33
PID 2364 wrote to memory of 2812	2364	hack.exe	34
PID 2364 wrote to memory of 2812	2364	hack.exe	34
PID 2364 wrote to memory of 2812	2364	hack.exe	34
PID 2364 wrote to memory of 2812	2364	hack.exe	34
PID 2364 wrote to memory of 2720	2364	hack.exe	35
PID 2364 wrote to memory of 2720	2364	hack.exe	35
PID 2364 wrote to memory of 2720	2364	hack.exe	35
PID 2364 wrote to memory of 2720	2364	hack.exe	35
PID 2364 wrote to memory of 2756	2364	hack.exe	36
PID 2364 wrote to memory of 2756	2364	hack.exe	36
PID 2364 wrote to memory of 2756	2364	hack.exe	36
PID 2364 wrote to memory of 2756	2364	hack.exe	36
PID 2364 wrote to memory of 2244	2364	hack.exe	37
PID 2364 wrote to memory of 2244	2364	hack.exe	37
PID 2364 wrote to memory of 2244	2364	hack.exe	37
PID 2364 wrote to memory of 2244	2364	hack.exe	37
PID 2952 wrote to memory of 2736	2952	cmd.exe	38
PID 2952 wrote to memory of 2736	2952	cmd.exe	38
PID 2952 wrote to memory of 2736	2952	cmd.exe	38
PID 2244 wrote to memory of 2176	2244	cmd.exe	39
PID 2244 wrote to memory of 2176	2244	cmd.exe	39
PID 2244 wrote to memory of 2176	2244	cmd.exe	39
PID 2720 wrote to memory of 2848	2720	cmd.exe	40
PID 2720 wrote to memory of 2848	2720	cmd.exe	40
PID 2720 wrote to memory of 2848	2720	cmd.exe	40
PID 2812 wrote to memory of 3592	2812	cmd.exe	41
PID 2812 wrote to memory of 3592	2812	cmd.exe	41
PID 2812 wrote to memory of 3592	2812	cmd.exe	41
PID 2756 wrote to memory of 2420	2756	cmd.exe	42
PID 2756 wrote to memory of 2420	2756	cmd.exe	42
PID 2756 wrote to memory of 2420	2756	cmd.exe	42
PID 2364 wrote to memory of 544	2364	hack.exe	48
PID 2364 wrote to memory of 544	2364	hack.exe	48
PID 2364 wrote to memory of 544	2364	hack.exe	48
PID 2364 wrote to memory of 544	2364	hack.exe	48
PID 544 wrote to memory of 3500	544	powershell.exe	49
PID 544 wrote to memory of 3500	544	powershell.exe	49
PID 544 wrote to memory of 3500	544	powershell.exe	49
PID 544 wrote to memory of 4196	544	powershell.exe	50
PID 544 wrote to memory of 4196	544	powershell.exe	50
PID 544 wrote to memory of 4196	544	powershell.exe	50

Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

C:\Users\Admin\AppData\Local\Temp\test.exe
"C:\Users\Admin\AppData\Local\Temp\test.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2136
- C:\Users\Admin\AppData\Local\Temp\hack.exe
  "C:\Users\Admin\AppData\Local\Temp\hack.exe"
  2⤵
  - Executes dropped EXE
  - Drops desktop.ini file(s)
  - Enumerates connected drives
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2364
- - C:\Windows\system32\cmd.exe
    cmd /c wmic shadowcopy delete /nointeractive
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2952
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete /nointeractive
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:2736
- - C:\Windows\system32\cmd.exe
    cmd /c vssadmin.exe Delete Shadows /All /Quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2812
  - - C:\Windows\system32\vssadmin.exe
      vssadmin.exe Delete Shadows /All /Quiet
      4⤵
      Interacts with shadow copies
      PID:3592
- - C:\Windows\system32\cmd.exe
    cmd /c bcdedit /set {default} recoveryenabled No
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2720
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled No
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2848
- - C:\Windows\system32\cmd.exe
    cmd /c bcdedit /set {default} bootstatuspolicy ignoreallfailures
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2756
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2420
- - C:\Windows\system32\cmd.exe
    cmd /c powershell -command "Get-EventLog -LogName * | ForEach { Clear-EventLog $_.Log }"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2244
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      powershell -command "Get-EventLog -LogName * | ForEach { Clear-EventLog $_.Log }"
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2176
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell -Command "$a = [System.IO.File]::ReadAllText(\"Z:\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;"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:544
  - - 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\953701564.png /f
      4⤵
      Sets desktop wallpaper using registry
      PID:3500
  - - C:\Windows\system32\rundll32.exe
      "C:\Windows\system32\rundll32.exe" user32.dll UpdatePerUserSystemParameters 0 False
      4⤵
      PID:4196
- C:\Users\Admin\AppData\Local\Temp\Firefox Installer.exe
  "C:\Users\Admin\AppData\Local\Temp\Firefox Installer.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:588

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1388

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Windows Management Instrumentation

T1047

Persistence

Privilege Escalation

Defense Evasion

Direct Volume Access

T1006

Indicator Removal

T1070

File Deletion

T1070.004

Modify Registry

T1112

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Defacement

T1491

Inhibit System Recovery

T1490

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\Firefox Installer.exe

Filesize
364KB

MD5
530894a1f0eb42c7837db4d74829f5c6

SHA1
99909db6f574ca964a9b822b9b19fd2e851b8c1e

SHA256
aac3ce797f50e0a5b9f1b43aaaffb439d4c42e3cf5b9fbeac52fa3d263fde3d0

SHA512
0836dd919c5f5648ce3445f9a3c84afe5e1e694ff998f1204498b2a86b13ed297469bea88af0ad7e49c97cd57153c7c43fd0a311b4c2685f4dfca5574d1d10f0

Download Submit
C:\Users\Admin\AppData\Local\Temp\hack.exe

Filesize
807KB

MD5
e27b5291c8fb2dfdeb7f16bb6851df5e

SHA1
40207f83b601cd60905c1f807ac0889c80dfe33f

SHA256
ffd933ad53f22a0f10cceb4986087258f72dffdd36999b7014c6b37c157ee45f

SHA512
2ddbc50cd780ffbf73c354b9b437322eb49cb05bb6f287d54e7dcafb61dc4c4549e37ae2f972f3d240bfa7d2ca485b7583137f1bf038bc901f378cea0c305c6a

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

Filesize
7KB

MD5
9bfac2cde53a59d7976d2204e20fdf14

SHA1
cb51b9d52ba48413e7f35ded19136c0874331ba5

SHA256
f8fef37593e39f1d056df83e89f86ee49275ec3266440fd7a2b1973e76a6fcba

SHA512
5a35860c228dc9835d0d4b4da227fcf04de0afa0ad90804a693420cfe17ac9440df2d933a6aba393902a785a6f863a801bfc9cc52363ba1c2dde308fec9022a9

Download Submit
\Device\HarddiskVolume1\GET_YOUR_FILES_BACK.txt

Filesize
1011B

MD5
c92c2b70fb37f84aab38412ad9226aa8

SHA1
14f2e9a83285612d0a7b2c83b8f89bccfde6c154

SHA256
d64639e873c0873b469cd856d1ef4bce7dc14a80fac6fe2bed9d629f05acc77f

SHA512
04f9dcb3cd49909712535255b6eadd7fafcb2902bf1abd5a25e9bb5f5c4dc032611aec0a5b0ec89cd7dbc65276b935c54b906b391507d2e3e3aa65466b15f848

Download Submit
memory/544-24556-0x000000001B580000-0x000000001B862000-memory.dmp

Filesize
2.9MB

Download
memory/544-24557-0x0000000002890000-0x0000000002898000-memory.dmp

Filesize
32KB

Download
memory/588-11-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download
memory/588-13-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download
memory/2136-9-0x000000013F5D0000-0x000000013F769000-memory.dmp

Filesize
1.6MB

Download
memory/2176-748-0x000000001B680000-0x000000001B962000-memory.dmp

Filesize
2.9MB

Download
memory/2176-749-0x0000000001EF0000-0x0000000001EF8000-memory.dmp

Filesize
32KB

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