Analysis
- max time kernel
148s - max time network
152s - platform
windows10-2004_x64 - resource
win10v2004-20240419-en - resource tags
- submitted
04/05/2024, 19:56
General
- Target 2024-05-04_dfa1d080376934e083d3f3552225d828_cryptolocker.exe
- Size 80KB
- Sample240504-yn2hpahd2y
- SHA256 bfb9d8d0681e195617afb4d6e51711516277a27cd61ad1a9b07912708a4cd621
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\2024-05-04_dfa1d080376934e083d3f3552225d828_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-04_dfa1d080376934e083d3f3552225d828_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/4348-0-0x0000000000500000-0x0000000000510000-memory.dmp
memory/4348-1-0x0000000000730000-0x0000000000736000-memory.dmp
memory/4348-2-0x0000000000760000-0x0000000000766000-memory.dmp
memory/4348-9-0x0000000000730000-0x0000000000736000-memory.dmp
memory/4348-17-0x0000000000500000-0x0000000000510000-memory.dmp
memory/4552-18-0x0000000000500000-0x0000000000510000-memory.dmp
memory/4552-20-0x0000000000820000-0x0000000000826000-memory.dmp
memory/4552-26-0x0000000000660000-0x0000000000666000-memory.dmp
memory/4552-27-0x0000000000500000-0x0000000000510000-memory.dmp