Analysis
- max time kernel
150s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
11/06/2024, 09:25
General
- Target 2024-06-11_7075bcb7d076ee5f4a3a1aea54e4dcbd_cryptolocker.exe
- Size 78KB
- Sample240611-ldn4dssakc
- SHA256 f6c25b3c5df5fb1bce9d6cba2b0c39e84b5ce1c56bef4cdc8fee6c8080400519
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\2024-06-11_7075bcb7d076ee5f4a3a1aea54e4dcbd_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-11_7075bcb7d076ee5f4a3a1aea54e4dcbd_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
Loading Replay Monitor...
Downloads
asih.exe
memory/2444-0-0x0000000000500000-0x0000000000510000-memory.dmp
memory/2444-1-0x00000000020D0000-0x00000000020D6000-memory.dmp
memory/2444-2-0x00000000020D0000-0x00000000020D6000-memory.dmp
memory/2444-3-0x00000000020F0000-0x00000000020F6000-memory.dmp
memory/2444-17-0x0000000000500000-0x0000000000510000-memory.dmp
memory/4260-18-0x0000000000500000-0x0000000000510000-memory.dmp
memory/4260-20-0x00000000004F0000-0x00000000004F6000-memory.dmp
memory/4260-26-0x00000000004D0000-0x00000000004D6000-memory.dmp
memory/4260-27-0x0000000000500000-0x0000000000510000-memory.dmp