Analysis
- max time kernel
148s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
06/06/2024, 20:19
General
- Target 2024-06-06_ff93fb0e4c05db4bffdc2bd19f436b04_cryptolocker.exe
- Size 40KB
- Sample240606-y35hwsbe41
- SHA256 d03218057c2d0750e92e3fe3e1a5af71fb5251f37ec49d32186c493b73b091a9
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\2024-06-06_ff93fb0e4c05db4bffdc2bd19f436b04_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-06_ff93fb0e4c05db4bffdc2bd19f436b04_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/1716-19-0x0000000000500000-0x0000000000510000-memory.dmp
memory/1716-21-0x0000000002100000-0x0000000002106000-memory.dmp
memory/1716-27-0x0000000000520000-0x0000000000526000-memory.dmp
memory/1716-28-0x0000000000500000-0x0000000000510000-memory.dmp
memory/2788-0-0x0000000000500000-0x0000000000510000-memory.dmp
memory/2788-1-0x00000000005C0000-0x00000000005C6000-memory.dmp
memory/2788-3-0x00000000005E0000-0x00000000005E6000-memory.dmp
memory/2788-9-0x00000000005C0000-0x00000000005C6000-memory.dmp
memory/2788-18-0x0000000000500000-0x0000000000510000-memory.dmp