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Analysis
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max time kernel
147s -
max time network
140s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
14/05/2024, 13:37
Static task
static1
Behavioral task
behavioral1
Sample
41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe
Resource
win7-20240419-en
Behavioral task
behavioral2
Sample
41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe
Resource
win10v2004-20240426-en
General
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Target
41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe
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Size
589KB
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MD5
41b007b09b3da5bf2f1e6bf34d7ca6c1
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SHA1
1c1b84e1cf1576f8d5c9622aad42def01c48a493
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SHA256
9f44eaf881e2e145794a360aca1cdd2e9ac2e020e59b1829ea8f92d4fd3eebd0
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SHA512
50347bc41495d893c1c71fdb0b36bb2a56d672d7af9c3ad0dcc8cfd334ead9c96c849863afaeb3d555924de61a79febc5a39e6ba2b965c4289b2c96ab2584ec3
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SSDEEP
12288:MUiTFXMfffP5dgVHYPT4m90rrYQp48+0I6O4lNh7vaqFaFmSiyyjKF:MUihXy/YClF6O4HhBd8F
Malware Config
Extracted
F:\$RECYCLE.BIN\KRAB-DECRYPT.txt
http://gandcrabmfe6mnef.onion/8b72f5bbd591c08d
Signatures
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Gandcrab
Gandcrab is a Trojan horse that encrypts files on a computer.
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Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Renames multiple (288) 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-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe -
Drops startup file 2 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\KRAB-DECRYPT.txt 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\d591c760d591c08e56.lock 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe -
Reads user/profile data of web browsers 2 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) \??\P: 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened (read-only) \??\B: 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened (read-only) \??\E: 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened (read-only) \??\G: 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened (read-only) \??\J: 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened (read-only) \??\K: 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened (read-only) \??\M: 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened (read-only) \??\W: 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened (read-only) \??\A: 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened (read-only) \??\H: 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened (read-only) \??\L: 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened (read-only) \??\Q: 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened (read-only) \??\V: 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened (read-only) \??\Y: 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened (read-only) \??\Z: 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened (read-only) \??\X: 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened (read-only) \??\I: 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened (read-only) \??\N: 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened (read-only) \??\O: 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened (read-only) \??\R: 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened (read-only) \??\S: 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened (read-only) \??\T: 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened (read-only) \??\U: 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe -
Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 3432 set thread context of 1624 3432 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe 110 -
Drops file in Program Files directory 36 IoCs
description ioc Process File created C:\Program Files (x86)\KRAB-DECRYPT.txt 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File created C:\Program Files (x86)\d591c760d591c08e56.lock 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened for modification C:\Program Files\RestartMerge.DVR 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened for modification C:\Program Files\SaveHide.ps1 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened for modification C:\Program Files\RevokeEdit.vstm 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened for modification C:\Program Files\RevokeWait.zip 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened for modification C:\Program Files\SubmitJoin.snd 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File created C:\Program Files\KRAB-DECRYPT.txt 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File created C:\Program Files\d591c760d591c08e56.lock 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened for modification C:\Program Files\MeasureEdit.mpg 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened for modification C:\Program Files\MoveApprove.M2T 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened for modification C:\Program Files\OptimizeMerge.mpeg 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened for modification C:\Program Files\FindSend.wmf 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened for modification C:\Program Files\JoinRename.xps 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened for modification C:\Program Files\UnregisterWait.avi 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened for modification C:\Program Files\CompareMove.mpe 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened for modification C:\Program Files\ResolveConfirm.ttf 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened for modification C:\Program Files\DisconnectCompress.mp4v 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened for modification C:\Program Files\ExitCopy.htm 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened for modification C:\Program Files\MoveGrant.crw 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened for modification C:\Program Files\SwitchDeny.vdx 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened for modification C:\Program Files\UninstallInstall.xlt 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened for modification C:\Program Files\AddWait.tif 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened for modification C:\Program Files\CompleteStart.mht 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened for modification C:\Program Files\WatchGrant.temp 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened for modification C:\Program Files\WriteUpdate.ex_ 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened for modification C:\Program Files\FormatDeny.vdx 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened for modification C:\Program Files\StartDismount.ppt 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened for modification C:\Program Files\DismountResume.svg 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened for modification C:\Program Files\ReceiveInstall.html 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened for modification C:\Program Files\DisconnectWrite.m1v 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened for modification C:\Program Files\GrantInvoke.au 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened for modification C:\Program Files\OpenJoin.mpeg3 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened for modification C:\Program Files\ProtectTrace.css 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened for modification C:\Program Files\ConvertSearch.wmx 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe File opened for modification C:\Program Files\DenyOptimize.M2T 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 1624 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe 1624 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe 1624 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe 1624 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe -
Suspicious use of AdjustPrivilegeToken 45 IoCs
description pid Process Token: SeIncreaseQuotaPrivilege 3380 wmic.exe Token: SeSecurityPrivilege 3380 wmic.exe Token: SeTakeOwnershipPrivilege 3380 wmic.exe Token: SeLoadDriverPrivilege 3380 wmic.exe Token: SeSystemProfilePrivilege 3380 wmic.exe Token: SeSystemtimePrivilege 3380 wmic.exe Token: SeProfSingleProcessPrivilege 3380 wmic.exe Token: SeIncBasePriorityPrivilege 3380 wmic.exe Token: SeCreatePagefilePrivilege 3380 wmic.exe Token: SeBackupPrivilege 3380 wmic.exe Token: SeRestorePrivilege 3380 wmic.exe Token: SeShutdownPrivilege 3380 wmic.exe Token: SeDebugPrivilege 3380 wmic.exe Token: SeSystemEnvironmentPrivilege 3380 wmic.exe Token: SeRemoteShutdownPrivilege 3380 wmic.exe Token: SeUndockPrivilege 3380 wmic.exe Token: SeManageVolumePrivilege 3380 wmic.exe Token: 33 3380 wmic.exe Token: 34 3380 wmic.exe Token: 35 3380 wmic.exe Token: 36 3380 wmic.exe Token: SeIncreaseQuotaPrivilege 3380 wmic.exe Token: SeSecurityPrivilege 3380 wmic.exe Token: SeTakeOwnershipPrivilege 3380 wmic.exe Token: SeLoadDriverPrivilege 3380 wmic.exe Token: SeSystemProfilePrivilege 3380 wmic.exe Token: SeSystemtimePrivilege 3380 wmic.exe Token: SeProfSingleProcessPrivilege 3380 wmic.exe Token: SeIncBasePriorityPrivilege 3380 wmic.exe Token: SeCreatePagefilePrivilege 3380 wmic.exe Token: SeBackupPrivilege 3380 wmic.exe Token: SeRestorePrivilege 3380 wmic.exe Token: SeShutdownPrivilege 3380 wmic.exe Token: SeDebugPrivilege 3380 wmic.exe Token: SeSystemEnvironmentPrivilege 3380 wmic.exe Token: SeRemoteShutdownPrivilege 3380 wmic.exe Token: SeUndockPrivilege 3380 wmic.exe Token: SeManageVolumePrivilege 3380 wmic.exe Token: 33 3380 wmic.exe Token: 34 3380 wmic.exe Token: 35 3380 wmic.exe Token: 36 3380 wmic.exe Token: SeBackupPrivilege 2368 vssvc.exe Token: SeRestorePrivilege 2368 vssvc.exe Token: SeAuditPrivilege 2368 vssvc.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 3432 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe -
Suspicious use of SendNotifyMessage 1 IoCs
pid Process 3432 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe -
Suspicious use of WriteProcessMemory 7 IoCs
description pid Process procid_target PID 3432 wrote to memory of 1624 3432 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe 110 PID 3432 wrote to memory of 1624 3432 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe 110 PID 3432 wrote to memory of 1624 3432 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe 110 PID 3432 wrote to memory of 1624 3432 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe 110 PID 1624 wrote to memory of 3380 1624 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe 114 PID 1624 wrote to memory of 3380 1624 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe 114 PID 1624 wrote to memory of 3380 1624 41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe 114 -
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\41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe"C:\Users\Admin\AppData\Local\Temp\41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:3432 -
C:\Users\Admin\AppData\Local\Temp\41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exeC:\Users\Admin\AppData\Local\Temp\41b007b09b3da5bf2f1e6bf34d7ca6c1_JaffaCakes118.exe2⤵
- Checks computer location settings
- Drops startup file
- Enumerates connected drives
- Drops file in Program Files directory
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1624 -
C:\Windows\SysWOW64\wbem\wmic.exe"C:\Windows\system32\wbem\wmic.exe" shadowcopy delete3⤵
- Suspicious use of AdjustPrivilegeToken
PID:3380
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C:\Windows\system32\AUDIODG.EXEC:\Windows\system32\AUDIODG.EXE 0x2f4 0x2941⤵PID:720
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2368
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
8KB
MD5c1bdc624c443ef2972cae475cef4c539
SHA11d23f4b63c4d0588dfdeff25afc3afeb08172ff3
SHA256d5565a44fe7b24354bfbfcf1036b756206b72cc29d93106852d01a82ad0cacce
SHA512fcf4d48f5fc10894a76b19ac318c25fa6ecb523b932189f4abe0a2826cc7a6224fdd8cd316edaf3c78872c406555be19416a213f641dbd9174808dfce9c183c5