Analysis
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max time kernel
95s -
max time network
127s -
platform
windows10-ltsc 2021_x64 -
resource
win10ltsc2021-20250207-en -
resource tags
arch:x64arch:x86image:win10ltsc2021-20250207-enlocale:en-usos:windows10-ltsc 2021-x64system -
submitted
07-02-2025 17:45
Behavioral task
behavioral1
Sample
Krampus.rar
Resource
win10ltsc2021-20250207-en
windows10-ltsc 2021-x64
10 signatures
150 seconds
Behavioral task
behavioral2
Sample
Krampus.rar
Resource
win11-20241007-en
windows11-21h2-x64
3 signatures
150 seconds
Behavioral task
behavioral3
Sample
Krampus/b5uEJHZB6Rl.exe
Resource
win10ltsc2021-20250207-en
windows10-ltsc 2021-x64
7 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 behavioral3/memory/2880-1-0x0000027DE2D60000-0x0000027DE2DA0000-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 behavior: EnumeratesProcesses 4 IoCs
pid Process 2508 wmic.exe 2508 wmic.exe 2508 wmic.exe 2508 wmic.exe -
Suspicious use of AdjustPrivilegeToken 43 IoCs
description pid Process Token: SeDebugPrivilege 2880 b5uEJHZB6Rl.exe Token: SeIncreaseQuotaPrivilege 2508 wmic.exe Token: SeSecurityPrivilege 2508 wmic.exe Token: SeTakeOwnershipPrivilege 2508 wmic.exe Token: SeLoadDriverPrivilege 2508 wmic.exe Token: SeSystemProfilePrivilege 2508 wmic.exe Token: SeSystemtimePrivilege 2508 wmic.exe Token: SeProfSingleProcessPrivilege 2508 wmic.exe Token: SeIncBasePriorityPrivilege 2508 wmic.exe Token: SeCreatePagefilePrivilege 2508 wmic.exe Token: SeBackupPrivilege 2508 wmic.exe Token: SeRestorePrivilege 2508 wmic.exe Token: SeShutdownPrivilege 2508 wmic.exe Token: SeDebugPrivilege 2508 wmic.exe Token: SeSystemEnvironmentPrivilege 2508 wmic.exe Token: SeRemoteShutdownPrivilege 2508 wmic.exe Token: SeUndockPrivilege 2508 wmic.exe Token: SeManageVolumePrivilege 2508 wmic.exe Token: 33 2508 wmic.exe Token: 34 2508 wmic.exe Token: 35 2508 wmic.exe Token: 36 2508 wmic.exe Token: SeIncreaseQuotaPrivilege 2508 wmic.exe Token: SeSecurityPrivilege 2508 wmic.exe Token: SeTakeOwnershipPrivilege 2508 wmic.exe Token: SeLoadDriverPrivilege 2508 wmic.exe Token: SeSystemProfilePrivilege 2508 wmic.exe Token: SeSystemtimePrivilege 2508 wmic.exe Token: SeProfSingleProcessPrivilege 2508 wmic.exe Token: SeIncBasePriorityPrivilege 2508 wmic.exe Token: SeCreatePagefilePrivilege 2508 wmic.exe Token: SeBackupPrivilege 2508 wmic.exe Token: SeRestorePrivilege 2508 wmic.exe Token: SeShutdownPrivilege 2508 wmic.exe Token: SeDebugPrivilege 2508 wmic.exe Token: SeSystemEnvironmentPrivilege 2508 wmic.exe Token: SeRemoteShutdownPrivilege 2508 wmic.exe Token: SeUndockPrivilege 2508 wmic.exe Token: SeManageVolumePrivilege 2508 wmic.exe Token: 33 2508 wmic.exe Token: 34 2508 wmic.exe Token: 35 2508 wmic.exe Token: 36 2508 wmic.exe -
Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 2880 wrote to memory of 2508 2880 b5uEJHZB6Rl.exe 85 PID 2880 wrote to memory of 2508 2880 b5uEJHZB6Rl.exe 85
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:2880 -
C:\Windows\System32\Wbem\wmic.exe"wmic.exe" csproduct get uuid2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2508
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