Analysis
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max time kernel
140s -
max time network
147s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
30-11-2024 01:00
Static task
static1
Behavioral task
behavioral1
Sample
test.exe
Resource
win7-20241010-en
Behavioral task
behavioral2
Sample
test.exe
Resource
win10v2004-20241007-en
General
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Target
test.exe
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Size
297KB
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MD5
314558f9a6da39ffd12cba6c1064b3b8
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SHA1
2c416cbfa8aeee687534b7c0888d411c0a837c59
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SHA256
64a45b42204cf4412dc2891368a4b72670642a008b13f3d99f6d3d42de95a842
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SHA512
41fdd3cff2e4620c0dfc7adca6a985ba5af69c1e72be409ae8d206534e32e1d3d34358f3f90521f57969c3cdf391442f4dfeba2a174b3abcbe72257d36706947
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SSDEEP
6144:ZUL4NWKzjkaphkIOe2q4EVSh/Bw/mhMgAB:ZUsNWK3bT4EneIB
Malware Config
Extracted
C:\$Recycle.Bin\OCBZMZ-DECRYPT.txt
http://gandcrabmfe6mnef.onion/c1e7ea9d7188b408
Signatures
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Gandcrab
Gandcrab is a Trojan horse that encrypts files on a computer.
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Gandcrab family
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Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Renames multiple (299) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation test.exe -
Credentials from Password Stores: Windows Credential Manager 1 TTPs
Suspicious access to Credentials History.
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Drops startup file 2 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\OCBZMZ-DECRYPT.txt test.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\7188b3e57188b405116.lock test.exe -
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Enumerates connected drives 3 TTPs 23 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
description ioc Process File opened (read-only) \??\B: test.exe File opened (read-only) \??\Q: test.exe File opened (read-only) \??\V: test.exe File opened (read-only) \??\Z: test.exe File opened (read-only) \??\U: test.exe File opened (read-only) \??\W: test.exe File opened (read-only) \??\Y: test.exe File opened (read-only) \??\E: test.exe File opened (read-only) \??\J: test.exe File opened (read-only) \??\M: test.exe File opened (read-only) \??\R: test.exe File opened (read-only) \??\O: test.exe File opened (read-only) \??\P: test.exe File opened (read-only) \??\S: test.exe File opened (read-only) \??\A: test.exe File opened (read-only) \??\H: test.exe File opened (read-only) \??\I: test.exe File opened (read-only) \??\N: test.exe File opened (read-only) \??\X: test.exe File opened (read-only) \??\G: test.exe File opened (read-only) \??\K: test.exe File opened (read-only) \??\L: test.exe File opened (read-only) \??\T: test.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\\\pidor.bmp" test.exe -
Drops file in Program Files directory 20 IoCs
description ioc Process File created C:\Program Files\OCBZMZ-DECRYPT.txt test.exe File opened for modification C:\Program Files\ClearLimit.rmi test.exe File opened for modification C:\Program Files\ClearUndo.ex_ test.exe File opened for modification C:\Program Files\CloseComplete.xltx test.exe File created C:\Program Files (x86)\7188b3e57188b405116.lock test.exe File created C:\Program Files\7188b3e57188b405116.lock test.exe File opened for modification C:\Program Files\AssertRemove.rtf test.exe File opened for modification C:\Program Files\ResumeCopy.MTS test.exe File opened for modification C:\Program Files\UpdateResolve.3gp test.exe File opened for modification C:\Program Files\ConvertFromBackup.js test.exe File opened for modification C:\Program Files\NewReceive.mp2v test.exe File opened for modification C:\Program Files\PingApprove.mpg test.exe File opened for modification C:\Program Files\RedoOut.odt test.exe File opened for modification C:\Program Files\TestDismount.xml test.exe File created C:\Program Files (x86)\OCBZMZ-DECRYPT.txt test.exe File opened for modification C:\Program Files\CheckpointMove.reg test.exe File opened for modification C:\Program Files\DebugExit.ps1 test.exe File opened for modification C:\Program Files\DismountWait.mp3 test.exe File opened for modification C:\Program Files\MountUse.ods test.exe File opened for modification C:\Program Files\ResumeDebug.xml test.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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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.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language test.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language wmic.exe -
Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier test.exe Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 test.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString test.exe -
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\B51C067CEE2B0C3DF855AB2D92F4FE39D4E70F0E test.exe Set value (data) \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\B51C067CEE2B0C3DF855AB2D92F4FE39D4E70F0E\Blob = 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 test.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 4508 test.exe 4508 test.exe 4508 test.exe 4508 test.exe -
Suspicious use of AdjustPrivilegeToken 45 IoCs
description pid Process Token: SeIncreaseQuotaPrivilege 3292 wmic.exe Token: SeSecurityPrivilege 3292 wmic.exe Token: SeTakeOwnershipPrivilege 3292 wmic.exe Token: SeLoadDriverPrivilege 3292 wmic.exe Token: SeSystemProfilePrivilege 3292 wmic.exe Token: SeSystemtimePrivilege 3292 wmic.exe Token: SeProfSingleProcessPrivilege 3292 wmic.exe Token: SeIncBasePriorityPrivilege 3292 wmic.exe Token: SeCreatePagefilePrivilege 3292 wmic.exe Token: SeBackupPrivilege 3292 wmic.exe Token: SeRestorePrivilege 3292 wmic.exe Token: SeShutdownPrivilege 3292 wmic.exe Token: SeDebugPrivilege 3292 wmic.exe Token: SeSystemEnvironmentPrivilege 3292 wmic.exe Token: SeRemoteShutdownPrivilege 3292 wmic.exe Token: SeUndockPrivilege 3292 wmic.exe Token: SeManageVolumePrivilege 3292 wmic.exe Token: 33 3292 wmic.exe Token: 34 3292 wmic.exe Token: 35 3292 wmic.exe Token: 36 3292 wmic.exe Token: SeIncreaseQuotaPrivilege 3292 wmic.exe Token: SeSecurityPrivilege 3292 wmic.exe Token: SeTakeOwnershipPrivilege 3292 wmic.exe Token: SeLoadDriverPrivilege 3292 wmic.exe Token: SeSystemProfilePrivilege 3292 wmic.exe Token: SeSystemtimePrivilege 3292 wmic.exe Token: SeProfSingleProcessPrivilege 3292 wmic.exe Token: SeIncBasePriorityPrivilege 3292 wmic.exe Token: SeCreatePagefilePrivilege 3292 wmic.exe Token: SeBackupPrivilege 3292 wmic.exe Token: SeRestorePrivilege 3292 wmic.exe Token: SeShutdownPrivilege 3292 wmic.exe Token: SeDebugPrivilege 3292 wmic.exe Token: SeSystemEnvironmentPrivilege 3292 wmic.exe Token: SeRemoteShutdownPrivilege 3292 wmic.exe Token: SeUndockPrivilege 3292 wmic.exe Token: SeManageVolumePrivilege 3292 wmic.exe Token: 33 3292 wmic.exe Token: 34 3292 wmic.exe Token: 35 3292 wmic.exe Token: 36 3292 wmic.exe Token: SeBackupPrivilege 4264 vssvc.exe Token: SeRestorePrivilege 4264 vssvc.exe Token: SeAuditPrivilege 4264 vssvc.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 4508 wrote to memory of 3292 4508 test.exe 85 PID 4508 wrote to memory of 3292 4508 test.exe 85 PID 4508 wrote to memory of 3292 4508 test.exe 85 -
Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
Processes
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C:\Users\Admin\AppData\Local\Temp\test.exe"C:\Users\Admin\AppData\Local\Temp\test.exe"1⤵
- Checks computer location settings
- Drops startup file
- Enumerates connected drives
- Sets desktop wallpaper using registry
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4508 -
C:\Windows\SysWOW64\wbem\wmic.exe"C:\Windows\system32\wbem\wmic.exe" shadowcopy delete2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:3292
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4264
Network
MITRE ATT&CK Enterprise v15
Defense Evasion
Indicator Removal
1File Deletion
1Modify Registry
2Subvert Trust Controls
1Install Root Certificate
1Credential Access
Credentials from Password Stores
2Credentials from Web Browsers
1Windows Credential Manager
1Unsecured Credentials
1Credentials In Files
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
8KB
MD569ca110fc29d37b6d10209a54373d3a9
SHA14672c0010ac17f23cf5390833fb10e40911a2c6f
SHA256fb879f20a9a1f83d16b791133dab5a8cd5bbdd5e50904037b5f7238c08baf70f
SHA5124e02118237fc50f9a0897e7c2a3ba2a7c287ee102b22c7b8c1b0482bf1b9fda076fc2137cd478e753aec2de98d1e287bbdc3f5932bf04b3271b41efa251aab8c