Analysis
- max time kernel
148s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20231215-en - resource tags
- submitted
17/02/2024, 07:51
General
- Target 2024-02-17_c3a40280b09400eef16e901ba1fb0d9f_cryptolocker.exe
- Size 65KB
- Sample240217-jp7nrsdc25
- SHA256 a74d4205a690af648f235de8786c266a6de9657852da345923679f6c1a3bf8f8
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\2024-02-17_c3a40280b09400eef16e901ba1fb0d9f_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-17_c3a40280b09400eef16e901ba1fb0d9f_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/1196-17-0x0000000000500000-0x000000000050F311-memory.dmp
memory/1196-20-0x00000000006D0000-0x00000000006D6000-memory.dmp
memory/1196-21-0x00000000006B0000-0x00000000006B6000-memory.dmp
memory/1196-27-0x0000000000500000-0x000000000050F311-memory.dmp
memory/3048-0-0x0000000000500000-0x000000000050F311-memory.dmp
memory/3048-1-0x00000000021E0000-0x00000000021E6000-memory.dmp
memory/3048-2-0x00000000021E0000-0x00000000021E6000-memory.dmp
memory/3048-3-0x0000000002100000-0x0000000002106000-memory.dmp
memory/3048-18-0x0000000000500000-0x000000000050F311-memory.dmp