Analysis
- max time kernel
150s - max time network
156s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
03/06/2024, 10:25
General
- Target 2024-06-03_136fcdca284449809aad4f5e01d66fc8_cryptolocker.exe
- Size 42KB
- Sample240603-mggddsbc2z
- SHA256 f19bcc7733802a14dcbba2c93d0968b5d4facf2cfaf529eadd6f0cfc5d649ce5
Malware Config
Signatures
- Detection of CryptoLocker Variants 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\2024-06-03_136fcdca284449809aad4f5e01d66fc8_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-03_136fcdca284449809aad4f5e01d66fc8_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\hasfj.exe"C:\Users\Admin\AppData\Local\Temp\hasfj.exe"2⤵
- Executes dropped EXE
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
hasfj.exe
memory/1232-0-0x0000000008000000-0x000000000800F000-memory.dmp
memory/1232-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp
memory/1232-2-0x0000000003150000-0x0000000003156000-memory.dmp
memory/1232-9-0x0000000002EA0000-0x0000000002EA6000-memory.dmp
memory/1232-17-0x0000000008000000-0x000000000800F000-memory.dmp
memory/1628-18-0x0000000008000000-0x000000000800F000-memory.dmp
memory/1628-20-0x0000000003010000-0x0000000003016000-memory.dmp
memory/1628-26-0x0000000002D60000-0x0000000002D66000-memory.dmp
memory/1628-27-0x0000000008000000-0x000000000800F000-memory.dmp