Analysis
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max time kernel
3s -
max time network
4s -
platform
windows7_x64 -
resource
win7-20241023-en -
resource tags
arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system -
submitted
07-02-2025 17:44
Behavioral task
behavioral1
Sample
Krampus/b5uEJHZB6Rl.exe
Resource
win7-20241023-en
windows7-x64
6 signatures
150 seconds
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 behavioral1/memory/2916-1-0x0000000000830000-0x0000000000870000-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 6 ip-api.com -
Suspicious use of AdjustPrivilegeToken 41 IoCs
description pid Process Token: SeDebugPrivilege 2916 b5uEJHZB6Rl.exe Token: SeIncreaseQuotaPrivilege 2988 wmic.exe Token: SeSecurityPrivilege 2988 wmic.exe Token: SeTakeOwnershipPrivilege 2988 wmic.exe Token: SeLoadDriverPrivilege 2988 wmic.exe Token: SeSystemProfilePrivilege 2988 wmic.exe Token: SeSystemtimePrivilege 2988 wmic.exe Token: SeProfSingleProcessPrivilege 2988 wmic.exe Token: SeIncBasePriorityPrivilege 2988 wmic.exe Token: SeCreatePagefilePrivilege 2988 wmic.exe Token: SeBackupPrivilege 2988 wmic.exe Token: SeRestorePrivilege 2988 wmic.exe Token: SeShutdownPrivilege 2988 wmic.exe Token: SeDebugPrivilege 2988 wmic.exe Token: SeSystemEnvironmentPrivilege 2988 wmic.exe Token: SeRemoteShutdownPrivilege 2988 wmic.exe Token: SeUndockPrivilege 2988 wmic.exe Token: SeManageVolumePrivilege 2988 wmic.exe Token: 33 2988 wmic.exe Token: 34 2988 wmic.exe Token: 35 2988 wmic.exe Token: SeIncreaseQuotaPrivilege 2988 wmic.exe Token: SeSecurityPrivilege 2988 wmic.exe Token: SeTakeOwnershipPrivilege 2988 wmic.exe Token: SeLoadDriverPrivilege 2988 wmic.exe Token: SeSystemProfilePrivilege 2988 wmic.exe Token: SeSystemtimePrivilege 2988 wmic.exe Token: SeProfSingleProcessPrivilege 2988 wmic.exe Token: SeIncBasePriorityPrivilege 2988 wmic.exe Token: SeCreatePagefilePrivilege 2988 wmic.exe Token: SeBackupPrivilege 2988 wmic.exe Token: SeRestorePrivilege 2988 wmic.exe Token: SeShutdownPrivilege 2988 wmic.exe Token: SeDebugPrivilege 2988 wmic.exe Token: SeSystemEnvironmentPrivilege 2988 wmic.exe Token: SeRemoteShutdownPrivilege 2988 wmic.exe Token: SeUndockPrivilege 2988 wmic.exe Token: SeManageVolumePrivilege 2988 wmic.exe Token: 33 2988 wmic.exe Token: 34 2988 wmic.exe Token: 35 2988 wmic.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 2916 wrote to memory of 2988 2916 b5uEJHZB6Rl.exe 30 PID 2916 wrote to memory of 2988 2916 b5uEJHZB6Rl.exe 30 PID 2916 wrote to memory of 2988 2916 b5uEJHZB6Rl.exe 30
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:2916 -
C:\Windows\System32\Wbem\wmic.exe"wmic.exe" csproduct get uuid2⤵
- Suspicious use of AdjustPrivilegeToken
PID:2988
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