Analysis
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max time kernel
141s -
max time network
144s -
platform
windows10-2004_x64 -
resource
win10v2004-20230621-en -
resource tags
arch:x64arch:x86image:win10v2004-20230621-enlocale:en-usos:windows10-2004-x64system -
submitted
21-06-2023 23:12
Behavioral task
behavioral1
Sample
Umbral.exe
Resource
win7-20230621-en
windows7-x64
8 signatures
150 seconds
General
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Target
Umbral.exe
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Size
227KB
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MD5
8b456d26ac4c2edc6fd1f47796a65151
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SHA1
92054d829e679a748559264864b7f4d4d1bb96e2
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SHA256
e7f32c2d9d9aa4a4b9938f4c782fe31aa75e1e1c479e8ada580170193d250eac
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SHA512
3f807578f882afecf40ca992d3b237a04df136f95a52948c55efa0e0a13c8b38a68f21b68ed261062d8a42ed78bd29e942c065e522fe16415f0acdbdab174329
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SSDEEP
6144:+loZM+rIkd8g+EtXHkv/iD4Nqjn5nsAvHOXZkQldhb8e1mgi:ooZtL+EP8Nqjn5nsAvHOXZkQlTC
Malware Config
Signatures
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Detect Umbral payload 1 IoCs
resource yara_rule behavioral2/memory/436-133-0x000001D96AA40000-0x000001D96AA80000-memory.dmp family_umbral -
Suspicious use of AdjustPrivilegeToken 43 IoCs
description pid Process Token: SeDebugPrivilege 436 Umbral.exe Token: SeIncreaseQuotaPrivilege 4888 wmic.exe Token: SeSecurityPrivilege 4888 wmic.exe Token: SeTakeOwnershipPrivilege 4888 wmic.exe Token: SeLoadDriverPrivilege 4888 wmic.exe Token: SeSystemProfilePrivilege 4888 wmic.exe Token: SeSystemtimePrivilege 4888 wmic.exe Token: SeProfSingleProcessPrivilege 4888 wmic.exe Token: SeIncBasePriorityPrivilege 4888 wmic.exe Token: SeCreatePagefilePrivilege 4888 wmic.exe Token: SeBackupPrivilege 4888 wmic.exe Token: SeRestorePrivilege 4888 wmic.exe Token: SeShutdownPrivilege 4888 wmic.exe Token: SeDebugPrivilege 4888 wmic.exe Token: SeSystemEnvironmentPrivilege 4888 wmic.exe Token: SeRemoteShutdownPrivilege 4888 wmic.exe Token: SeUndockPrivilege 4888 wmic.exe Token: SeManageVolumePrivilege 4888 wmic.exe Token: 33 4888 wmic.exe Token: 34 4888 wmic.exe Token: 35 4888 wmic.exe Token: 36 4888 wmic.exe Token: SeIncreaseQuotaPrivilege 4888 wmic.exe Token: SeSecurityPrivilege 4888 wmic.exe Token: SeTakeOwnershipPrivilege 4888 wmic.exe Token: SeLoadDriverPrivilege 4888 wmic.exe Token: SeSystemProfilePrivilege 4888 wmic.exe Token: SeSystemtimePrivilege 4888 wmic.exe Token: SeProfSingleProcessPrivilege 4888 wmic.exe Token: SeIncBasePriorityPrivilege 4888 wmic.exe Token: SeCreatePagefilePrivilege 4888 wmic.exe Token: SeBackupPrivilege 4888 wmic.exe Token: SeRestorePrivilege 4888 wmic.exe Token: SeShutdownPrivilege 4888 wmic.exe Token: SeDebugPrivilege 4888 wmic.exe Token: SeSystemEnvironmentPrivilege 4888 wmic.exe Token: SeRemoteShutdownPrivilege 4888 wmic.exe Token: SeUndockPrivilege 4888 wmic.exe Token: SeManageVolumePrivilege 4888 wmic.exe Token: 33 4888 wmic.exe Token: 34 4888 wmic.exe Token: 35 4888 wmic.exe Token: 36 4888 wmic.exe -
Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 436 wrote to memory of 4888 436 Umbral.exe 79 PID 436 wrote to memory of 4888 436 Umbral.exe 79
Processes
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C:\Users\Admin\AppData\Local\Temp\Umbral.exe"C:\Users\Admin\AppData\Local\Temp\Umbral.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:436 -
C:\Windows\System32\Wbem\wmic.exe"wmic.exe" csproduct get uuid2⤵
- Suspicious use of AdjustPrivilegeToken
PID:4888
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C:\Windows\System32\rundll32.exeC:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding1⤵PID:4180