Analysis
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max time kernel
144s -
max time network
150s -
platform
windows11-21h2_x64 -
resource
win11-20231215-en -
resource tags
arch:x64arch:x86image:win11-20231215-enlocale:en-usos:windows11-21h2-x64system -
submitted
02-02-2024 19:57
General
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Target
Umbral lock.exe
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Size
230KB
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MD5
1fa176bdb23068c2e19ef70129e08bf4
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SHA1
dbd197d081d7cae7d4f78946e105d9adb781e702
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SHA256
e17e5bbcfcc361a560c909e75723ea3e4efba21c83633164cfcb26a0d2f5c7b3
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SHA512
cc474c855e8336d4fe61c78d195bc2b95223da1847824200f5c2382227c88709b4d4b43625a358d59a3de364baf2aa9b78897a49e737ea880b7e386407ce494b
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SSDEEP
6144:FloZM9rIkd8g+EtXHkv/iD4oQuYVjgULwyD1Ac5dHb8e1mAdIi:HoZmL+EP8oQuYVjgULwyD1Ac5Jfdx
Malware Config
Signatures
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Detect Umbral payload 1 IoCs
resource yara_rule behavioral1/memory/1368-0-0x000001F925FC0000-0x000001F926000000-memory.dmp family_umbral -
Suspicious use of AdjustPrivilegeToken 43 IoCs
description pid Process Token: SeDebugPrivilege 1368 Umbral lock.exe Token: SeIncreaseQuotaPrivilege 4468 wmic.exe Token: SeSecurityPrivilege 4468 wmic.exe Token: SeTakeOwnershipPrivilege 4468 wmic.exe Token: SeLoadDriverPrivilege 4468 wmic.exe Token: SeSystemProfilePrivilege 4468 wmic.exe Token: SeSystemtimePrivilege 4468 wmic.exe Token: SeProfSingleProcessPrivilege 4468 wmic.exe Token: SeIncBasePriorityPrivilege 4468 wmic.exe Token: SeCreatePagefilePrivilege 4468 wmic.exe Token: SeBackupPrivilege 4468 wmic.exe Token: SeRestorePrivilege 4468 wmic.exe Token: SeShutdownPrivilege 4468 wmic.exe Token: SeDebugPrivilege 4468 wmic.exe Token: SeSystemEnvironmentPrivilege 4468 wmic.exe Token: SeRemoteShutdownPrivilege 4468 wmic.exe Token: SeUndockPrivilege 4468 wmic.exe Token: SeManageVolumePrivilege 4468 wmic.exe Token: 33 4468 wmic.exe Token: 34 4468 wmic.exe Token: 35 4468 wmic.exe Token: 36 4468 wmic.exe Token: SeIncreaseQuotaPrivilege 4468 wmic.exe Token: SeSecurityPrivilege 4468 wmic.exe Token: SeTakeOwnershipPrivilege 4468 wmic.exe Token: SeLoadDriverPrivilege 4468 wmic.exe Token: SeSystemProfilePrivilege 4468 wmic.exe Token: SeSystemtimePrivilege 4468 wmic.exe Token: SeProfSingleProcessPrivilege 4468 wmic.exe Token: SeIncBasePriorityPrivilege 4468 wmic.exe Token: SeCreatePagefilePrivilege 4468 wmic.exe Token: SeBackupPrivilege 4468 wmic.exe Token: SeRestorePrivilege 4468 wmic.exe Token: SeShutdownPrivilege 4468 wmic.exe Token: SeDebugPrivilege 4468 wmic.exe Token: SeSystemEnvironmentPrivilege 4468 wmic.exe Token: SeRemoteShutdownPrivilege 4468 wmic.exe Token: SeUndockPrivilege 4468 wmic.exe Token: SeManageVolumePrivilege 4468 wmic.exe Token: 33 4468 wmic.exe Token: 34 4468 wmic.exe Token: 35 4468 wmic.exe Token: 36 4468 wmic.exe -
Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 1368 wrote to memory of 4468 1368 Umbral lock.exe 78 PID 1368 wrote to memory of 4468 1368 Umbral lock.exe 78
Processes
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C:\Users\Admin\AppData\Local\Temp\Umbral lock.exe"C:\Users\Admin\AppData\Local\Temp\Umbral lock.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1368 -
C:\Windows\System32\Wbem\wmic.exe"wmic.exe" csproduct get uuid2⤵
- Suspicious use of AdjustPrivilegeToken
PID:4468
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C:\Windows\SysWOW64\DllHost.exeC:\Windows\SysWOW64\DllHost.exe /Processid:{06622D85-6856-4460-8DE1-A81921B41C4B}1⤵PID:4984
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C:\Windows\system32\rundll32.exe"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,Control_RunDLL C:\Windows\System32\srchadmin.dll ,1⤵PID:5660