Analysis
- max time kernel
143s - max time network
126s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
04/09/2022, 15:52
General
- Target tmp.exe
- Size 794KB
- Sample220904-ta8ydscfd6
- SHA256 566584a10ff7bd4442abc0e13b0f4dc263bbe61a0fbf0a27c61bd92f511efe76
Malware Config
Extracted
-
colibri
-
1.2.0
-
Build1
-
http://zpltcmgodhvvedxtfcygvbgjkvgvcguygytfigj.cc/gate.php
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http://yugyuvyugguitgyuigtfyutdtoghghbbgyv.cx/gate.php
Signatures
- Colibri Loader
A loader sold as MaaS first seen in August 2021.
- Executes dropped EXE 3 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Suspicious use of SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 13 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\tmp.exe"C:\Users\Admin\AppData\Local\Temp\tmp.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\tmpD7D.tmp.exe"C:\Users\Admin\AppData\Local\Temp\tmpD7D.tmp.exe"2⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\tmpD7D.tmp.exe"C:\Users\Admin\AppData\Local\Temp\tmpD7D.tmp.exe"3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\tmpD7D.tmp.exe"C:\Users\Admin\AppData\Local\Temp\tmpD7D.tmp.exe"4⤵
- Executes dropped EXE
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
tmpD7D.tmp.exe
tmpD7D.tmp.exe
tmpD7D.tmp.exe
tmpD7D.tmp.exe
memory/2248-147-0x0000000003070000-0x0000000003082000-memory.dmp
memory/2248-148-0x000000001BCA0000-0x000000001BCDC000-memory.dmp
memory/2248-154-0x00007FFAB6C00000-0x00007FFAB76C1000-memory.dmp
memory/2248-153-0x000000001EDC0000-0x000000001F2E8000-memory.dmp
memory/2248-152-0x000000001E6C0000-0x000000001E882000-memory.dmp
memory/2248-151-0x000000001D6D0000-0x000000001D720000-memory.dmp
memory/2248-150-0x000000001B980000-0x000000001B99E000-memory.dmp
memory/2248-149-0x000000001D750000-0x000000001D7C6000-memory.dmp
memory/2248-133-0x0000000000C50000-0x0000000000D1C000-memory.dmp
memory/2248-137-0x00007FFAB6C00000-0x00007FFAB76C1000-memory.dmp
memory/2248-146-0x000000001DEE0000-0x000000001DFEA000-memory.dmp
memory/2248-132-0x00007FFAB6C00000-0x00007FFAB76C1000-memory.dmp
memory/3236-145-0x0000000000400000-0x0000000000407000-memory.dmp
memory/3236-143-0x0000000000400000-0x0000000000407000-memory.dmp
memory/3884-141-0x00000000005F4000-0x00000000005F7000-memory.dmp
memory/4896-138-0x0000000000C01000-0x0000000000C04000-memory.dmp