Analysis
- max time kernel
150s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
13/06/2024, 04:36
General
- Target 2024-06-13_f5a3c358d31378dfdab44fbfff59fdc5_cryptolocker.exe
- Size 54KB
- Sample240613-e8p6lsvapa
- SHA256 7e10bd0e773a19d07d5f7a915ea658bbf0ad8de095c40a15b1006ce4145f4733
Score
9/10
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\2024-06-13_f5a3c358d31378dfdab44fbfff59fdc5_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-13_f5a3c358d31378dfdab44fbfff59fdc5_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\lossy.exe"C:\Users\Admin\AppData\Local\Temp\lossy.exe"2⤵
- Executes dropped EXE
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
lossy.exe
memory/2972-0-0x0000000008000000-0x000000000800F000-memory.dmp
memory/2972-1-0x00000000005A0000-0x00000000005A6000-memory.dmp
memory/2972-2-0x0000000002100000-0x0000000002106000-memory.dmp
memory/2972-9-0x00000000005A0000-0x00000000005A6000-memory.dmp
memory/2972-17-0x0000000008000000-0x000000000800F000-memory.dmp
memory/4540-16-0x0000000008000000-0x000000000800F000-memory.dmp
memory/4540-26-0x0000000001FD0000-0x0000000001FD6000-memory.dmp
memory/4540-27-0x0000000008000000-0x000000000800F000-memory.dmp