Analysis
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max time kernel
151s -
max time network
158s -
platform
windows10_x64 -
resource
win10v20210410 -
submitted
26-07-2021 12:58
Static task
static1
Behavioral task
behavioral1
Sample
1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe
Resource
win7v20210410
General
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Target
1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe
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Size
121KB
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MD5
da301085de77edb94e279c81bcbeb65e
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SHA1
d35f76c16b7665bf7e3f412250ebc4f38670697f
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SHA256
1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157
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SHA512
00526408f5d2557080d00ae31d3448bb54c367ab3f23aaf830cfbeca9261a30292e0f95899ebe529e3a2712e5b2333765daa73a3f51817b185cdace6b0a1af3e
Malware Config
Extracted
C:\KRAB-DECRYPT.txt
http://gandcrabmfe6mnef.onion/d5cbddfa99bd0cb4
Signatures
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Gandcrab
Gandcrab is a Trojan horse that encrypts files on a computer.
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suricata: ET MALWARE [eSentire] Win32/GandCrab v4/5 Ransomware CnC Activity
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Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Modifies extensions of user files 7 IoCs
Ransomware generally changes the extension on encrypted files.
Processes:
1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exedescription ioc process File renamed C:\Users\Admin\Pictures\MergeProtect.tif => C:\Users\Admin\Pictures\MergeProtect.tif.KRAB 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File renamed C:\Users\Admin\Pictures\MergeUnlock.tif => C:\Users\Admin\Pictures\MergeUnlock.tif.KRAB 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened for modification C:\Users\Admin\Pictures\PingGrant.tiff 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File renamed C:\Users\Admin\Pictures\PingGrant.tiff => C:\Users\Admin\Pictures\PingGrant.tiff.KRAB 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File renamed C:\Users\Admin\Pictures\UninstallSync.tif => C:\Users\Admin\Pictures\UninstallSync.tif.KRAB 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File renamed C:\Users\Admin\Pictures\DisconnectCheckpoint.crw => C:\Users\Admin\Pictures\DisconnectCheckpoint.crw.KRAB 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File renamed C:\Users\Admin\Pictures\InvokeConnect.png => C:\Users\Admin\Pictures\InvokeConnect.png.KRAB 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe -
Drops startup file 2 IoCs
Processes:
1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\KRAB-DECRYPT.txt 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\99bd0b5499bd0cb5612.lock 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.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 24 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
Processes:
1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exedescription ioc process File opened (read-only) \??\B: 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened (read-only) \??\M: 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened (read-only) \??\R: 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened (read-only) \??\T: 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened (read-only) \??\U: 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened (read-only) \??\V: 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened (read-only) \??\W: 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened (read-only) \??\X: 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened (read-only) \??\Y: 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened (read-only) \??\A: 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened (read-only) \??\G: 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened (read-only) \??\H: 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened (read-only) \??\J: 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened (read-only) \??\L: 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened (read-only) \??\O: 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened (read-only) \??\P: 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened (read-only) \??\Z: 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened (read-only) \??\E: 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened (read-only) \??\I: 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened (read-only) \??\K: 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened (read-only) \??\N: 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened (read-only) \??\Q: 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened (read-only) \??\S: 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened (read-only) \??\F: 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe -
Drops file in Program Files directory 15 IoCs
Processes:
1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exedescription ioc process File opened for modification C:\Program Files\UnlockConfirm.php 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File created C:\Program Files\99bd0b5499bd0cb5612.lock 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened for modification C:\Program Files\DisableLock.svg 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened for modification C:\Program Files\HideGrant.odt 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened for modification C:\Program Files\MergeCopy.au3 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened for modification C:\Program Files\CompareConnect.wpl 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened for modification C:\Program Files\UnlockSearch.odp 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File created C:\Program Files\KRAB-DECRYPT.txt 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened for modification C:\Program Files\ResetResolve.xla 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File created C:\Program Files (x86)\KRAB-DECRYPT.txt 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File created C:\Program Files (x86)\99bd0b5499bd0cb5612.lock 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened for modification C:\Program Files\AssertSend.mp2v 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened for modification C:\Program Files\HideUnlock.csv 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened for modification C:\Program Files\OutEnable.dxf 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe File opened for modification C:\Program Files\UnblockProtect.tiff 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exedescription ioc process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe -
Processes:
1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exedescription ioc process Set value (data) \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exepid process 4016 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe 4016 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe 4016 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe 4016 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe -
Suspicious use of AdjustPrivilegeToken 45 IoCs
Processes:
wmic.exevssvc.exedescription pid process Token: SeIncreaseQuotaPrivilege 188 wmic.exe Token: SeSecurityPrivilege 188 wmic.exe Token: SeTakeOwnershipPrivilege 188 wmic.exe Token: SeLoadDriverPrivilege 188 wmic.exe Token: SeSystemProfilePrivilege 188 wmic.exe Token: SeSystemtimePrivilege 188 wmic.exe Token: SeProfSingleProcessPrivilege 188 wmic.exe Token: SeIncBasePriorityPrivilege 188 wmic.exe Token: SeCreatePagefilePrivilege 188 wmic.exe Token: SeBackupPrivilege 188 wmic.exe Token: SeRestorePrivilege 188 wmic.exe Token: SeShutdownPrivilege 188 wmic.exe Token: SeDebugPrivilege 188 wmic.exe Token: SeSystemEnvironmentPrivilege 188 wmic.exe Token: SeRemoteShutdownPrivilege 188 wmic.exe Token: SeUndockPrivilege 188 wmic.exe Token: SeManageVolumePrivilege 188 wmic.exe Token: 33 188 wmic.exe Token: 34 188 wmic.exe Token: 35 188 wmic.exe Token: 36 188 wmic.exe Token: SeIncreaseQuotaPrivilege 188 wmic.exe Token: SeSecurityPrivilege 188 wmic.exe Token: SeTakeOwnershipPrivilege 188 wmic.exe Token: SeLoadDriverPrivilege 188 wmic.exe Token: SeSystemProfilePrivilege 188 wmic.exe Token: SeSystemtimePrivilege 188 wmic.exe Token: SeProfSingleProcessPrivilege 188 wmic.exe Token: SeIncBasePriorityPrivilege 188 wmic.exe Token: SeCreatePagefilePrivilege 188 wmic.exe Token: SeBackupPrivilege 188 wmic.exe Token: SeRestorePrivilege 188 wmic.exe Token: SeShutdownPrivilege 188 wmic.exe Token: SeDebugPrivilege 188 wmic.exe Token: SeSystemEnvironmentPrivilege 188 wmic.exe Token: SeRemoteShutdownPrivilege 188 wmic.exe Token: SeUndockPrivilege 188 wmic.exe Token: SeManageVolumePrivilege 188 wmic.exe Token: 33 188 wmic.exe Token: 34 188 wmic.exe Token: 35 188 wmic.exe Token: 36 188 wmic.exe Token: SeBackupPrivilege 1272 vssvc.exe Token: SeRestorePrivilege 1272 vssvc.exe Token: SeAuditPrivilege 1272 vssvc.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exedescription pid process target process PID 4016 wrote to memory of 188 4016 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe wmic.exe PID 4016 wrote to memory of 188 4016 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe wmic.exe PID 4016 wrote to memory of 188 4016 1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe wmic.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe"C:\Users\Admin\AppData\Local\Temp\1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe"1⤵
- Modifies extensions of user files
- Drops startup file
- Enumerates connected drives
- Drops file in Program Files directory
- Checks processor information in registry
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\wbem\wmic.exe"C:\Windows\system32\wbem\wmic.exe" shadowcopy delete2⤵
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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memory/188-114-0x0000000000000000-mapping.dmp