Analysis
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max time kernel
143s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240419-en -
resource tags
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submitted
27/04/2024, 09:13
General
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Target
Krampus/B1OdUv8CBH.exe
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Size
1.0MB
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MD5
73a20ee98214059033a93ff5da62d903
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SHA1
a35422a4969f7d79fc9cf597cf40b7456d5b05d8
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SHA256
5df7cf7c7d153a0e55b0ca9299d00c26625e70cff3613540c5718fe74e4c7d12
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SHA512
7c3b08ebbc57467aa3615b14d7ea6f629e03e49c17d6268f62345cc58f4ca9823e45ef101c1e247db354ca944481470f94f9c226bc7774f78da9ad0185a76b47
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SSDEEP
1536:ZAiYlXZeFi9eKNVlb8i7ZUNQmD4O+HoddUT:anpo2Xb8C8D4OUoET
Malware Config
Extracted
xworm
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Install_directory
%ProgramData%
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install_file
svchost.exe
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pastebin_url
https://pastebin.com/raw/z5PQ82wE
Signatures
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Detect Xworm Payload 2 IoCs
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Xworm
Xworm is a remote access trojan written in C#.
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
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Drops startup file 2 IoCs
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Executes dropped EXE 2 IoCs
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Adds Run key to start application 2 TTPs 1 IoCs
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Legitimate hosting services abused for malware hosting/C2 1 TTPs 9 IoCs
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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.
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious use of AdjustPrivilegeToken 3 IoCs
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Suspicious use of WriteProcessMemory 2 IoCs
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Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Users\Admin\AppData\Local\Temp\Krampus\B1OdUv8CBH.exe"C:\Users\Admin\AppData\Local\Temp\Krampus\B1OdUv8CBH.exe"1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\ProgramData\svchost.exe"2⤵
- Creates scheduled task(s)
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C:\ProgramData\svchost.exeC:\ProgramData\svchost.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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C:\ProgramData\svchost.exeC:\ProgramData\svchost.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
1.0MB
MD573a20ee98214059033a93ff5da62d903
SHA1a35422a4969f7d79fc9cf597cf40b7456d5b05d8
SHA2565df7cf7c7d153a0e55b0ca9299d00c26625e70cff3613540c5718fe74e4c7d12
SHA5127c3b08ebbc57467aa3615b14d7ea6f629e03e49c17d6268f62345cc58f4ca9823e45ef101c1e247db354ca944481470f94f9c226bc7774f78da9ad0185a76b47
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Filesize
654B
MD52ff39f6c7249774be85fd60a8f9a245e
SHA1684ff36b31aedc1e587c8496c02722c6698c1c4e
SHA256e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced
SHA5121d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1
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Filesize
10.8MB
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Filesize
10.8MB
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Filesize
104KB
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Filesize
10.8MB
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Filesize
64KB
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Filesize
10.8MB
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Filesize
64KB