Analysis
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max time kernel
147s -
max time network
151s -
platform
windows11-21h2_x64 -
resource
win11-20241007-en -
resource tags
arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system -
submitted
07-02-2025 17:45
Behavioral task
behavioral1
Sample
Krampus.rar
Resource
win10ltsc2021-20250207-en
windows10-ltsc 2021-x64
Behavioral task
behavioral2
Sample
Krampus.rar
Resource
win11-20241007-en
windows11-21h2-x64
Behavioral task
behavioral3
Sample
Krampus/b5uEJHZB6Rl.exe
Resource
win10ltsc2021-20250207-en
windows10-ltsc 2021-x64
General
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Target
Krampus/b5uEJHZB6Rl.exe
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Size
231KB
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MD5
438289fb9c72ed39bf5497f9af21ec7a
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SHA1
8120391ecb41ed6a4c6ef0b259776e59311d6997
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SHA256
ea4cb7c7b4cfb2fcc04d1c3f96b20c26638e69a97b15cae14659f0d6afb78f85
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SHA512
3647907fa2d503a242ef07cb20b081444b75e0c618a91232c8e77903b4b6aa823b8a7cbe07a45e02591fe48fdd23b5eae88565006b85863c0a5f6e42d7589fe0
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SSDEEP
6144:YloZM+rIkd8g+EtXHkv/iD4Bs4DdLocD/abtIEx6tb8e1mTiu:GoZtL+EP8Bs4DdLocD/abtIExq1
Malware Config
Signatures
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Detect Umbral payload 1 IoCs
resource yara_rule behavioral4/memory/3608-1-0x000001B588EC0000-0x000001B588F00000-memory.dmp family_umbral -
Umbral family
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Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 1 ip-api.com -
Suspicious use of AdjustPrivilegeToken 43 IoCs
description pid Process Token: SeDebugPrivilege 3608 b5uEJHZB6Rl.exe Token: SeIncreaseQuotaPrivilege 4316 wmic.exe Token: SeSecurityPrivilege 4316 wmic.exe Token: SeTakeOwnershipPrivilege 4316 wmic.exe Token: SeLoadDriverPrivilege 4316 wmic.exe Token: SeSystemProfilePrivilege 4316 wmic.exe Token: SeSystemtimePrivilege 4316 wmic.exe Token: SeProfSingleProcessPrivilege 4316 wmic.exe Token: SeIncBasePriorityPrivilege 4316 wmic.exe Token: SeCreatePagefilePrivilege 4316 wmic.exe Token: SeBackupPrivilege 4316 wmic.exe Token: SeRestorePrivilege 4316 wmic.exe Token: SeShutdownPrivilege 4316 wmic.exe Token: SeDebugPrivilege 4316 wmic.exe Token: SeSystemEnvironmentPrivilege 4316 wmic.exe Token: SeRemoteShutdownPrivilege 4316 wmic.exe Token: SeUndockPrivilege 4316 wmic.exe Token: SeManageVolumePrivilege 4316 wmic.exe Token: 33 4316 wmic.exe Token: 34 4316 wmic.exe Token: 35 4316 wmic.exe Token: 36 4316 wmic.exe Token: SeIncreaseQuotaPrivilege 4316 wmic.exe Token: SeSecurityPrivilege 4316 wmic.exe Token: SeTakeOwnershipPrivilege 4316 wmic.exe Token: SeLoadDriverPrivilege 4316 wmic.exe Token: SeSystemProfilePrivilege 4316 wmic.exe Token: SeSystemtimePrivilege 4316 wmic.exe Token: SeProfSingleProcessPrivilege 4316 wmic.exe Token: SeIncBasePriorityPrivilege 4316 wmic.exe Token: SeCreatePagefilePrivilege 4316 wmic.exe Token: SeBackupPrivilege 4316 wmic.exe Token: SeRestorePrivilege 4316 wmic.exe Token: SeShutdownPrivilege 4316 wmic.exe Token: SeDebugPrivilege 4316 wmic.exe Token: SeSystemEnvironmentPrivilege 4316 wmic.exe Token: SeRemoteShutdownPrivilege 4316 wmic.exe Token: SeUndockPrivilege 4316 wmic.exe Token: SeManageVolumePrivilege 4316 wmic.exe Token: 33 4316 wmic.exe Token: 34 4316 wmic.exe Token: 35 4316 wmic.exe Token: 36 4316 wmic.exe -
Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 3608 wrote to memory of 4316 3608 b5uEJHZB6Rl.exe 78 PID 3608 wrote to memory of 4316 3608 b5uEJHZB6Rl.exe 78
Processes
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C:\Users\Admin\AppData\Local\Temp\Krampus\b5uEJHZB6Rl.exe"C:\Users\Admin\AppData\Local\Temp\Krampus\b5uEJHZB6Rl.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3608 -
C:\Windows\System32\Wbem\wmic.exe"wmic.exe" csproduct get uuid2⤵
- Suspicious use of AdjustPrivilegeToken
PID:4316
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