Analysis
- max time kernel
150s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
13/06/2024, 04:27
General
- Target 2024-06-13_5ff17bde5aaf1857c14b72b3c4c4d4f7_cryptolocker.exe
- Size 40KB
- Sample240613-e3cckaxglj
- SHA256 1fbdd696fecb1e17794df3a1c5110a50f37ddea501daf80bd7d6d2af00e081f1
Malware Config
Signatures
- Detection of CryptoLocker Variants 5 IoCs
- Detection of Cryptolocker Samples 5 IoCs
- UPX dump on OEP (original entry point) 5 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- UPX packed file 5 IoCs
Detects executables packed with UPX/modified UPX open source packer.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Suspicious use of WriteProcessMemory 3 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\2024-06-13_5ff17bde5aaf1857c14b72b3c4c4d4f7_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-13_5ff17bde5aaf1857c14b72b3c4c4d4f7_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
asih.exe
memory/804-0-0x0000000000500000-0x0000000000510000-memory.dmp
memory/804-1-0x0000000000620000-0x0000000000626000-memory.dmp
memory/804-2-0x0000000000650000-0x0000000000656000-memory.dmp
memory/804-9-0x0000000000620000-0x0000000000626000-memory.dmp
memory/804-19-0x0000000000500000-0x0000000000510000-memory.dmp
memory/2504-17-0x0000000000500000-0x0000000000510000-memory.dmp
memory/2504-21-0x0000000000510000-0x0000000000516000-memory.dmp
memory/2504-27-0x00000000004E0000-0x00000000004E6000-memory.dmp
memory/2504-28-0x0000000000500000-0x0000000000510000-memory.dmp