Analysis
- max time kernel
148s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
08/06/2024, 08:36
General
- Target 2024-06-08_d37dd1494573198ae348f27a7efa39be_cryptolocker.exe
- Size 96KB
- Sample240608-khmwfsbd79
- SHA256 22d50f0588fbcfab5c333dfbc9101555d941ce3e3e2da5dcd44f0398c9508afc
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\2024-06-08_d37dd1494573198ae348f27a7efa39be_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-08_d37dd1494573198ae348f27a7efa39be_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/1384-0-0x0000000000500000-0x000000000050F000-memory.dmp
memory/1384-1-0x00000000006B0000-0x00000000006B6000-memory.dmp
memory/1384-3-0x00000000020F0000-0x00000000020F6000-memory.dmp
memory/1384-9-0x00000000006B0000-0x00000000006B6000-memory.dmp
memory/1384-19-0x0000000000500000-0x000000000050F000-memory.dmp
memory/4072-17-0x0000000000500000-0x000000000050F000-memory.dmp
memory/4072-21-0x00000000004F0000-0x00000000004F6000-memory.dmp
memory/4072-27-0x00000000004D0000-0x00000000004D6000-memory.dmp
memory/4072-28-0x0000000000500000-0x000000000050F000-memory.dmp