Analysis
- max time kernel
150s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
03/06/2024, 04:29
General
- Target 2024-06-03_65f24d49d4a1c8cdb982525360b4fc64_cryptolocker.exe
- Size 35KB
- Sample240603-e4a6wscf78
- SHA256 b89013bdc8a7bdb2d850f9df28b24fa51d92c4ef7bd37c5df4159d0b7e200b7b
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_65f24d49d4a1c8cdb982525360b4fc64_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-03_65f24d49d4a1c8cdb982525360b4fc64_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/212-0-0x0000000008000000-0x000000000800E000-memory.dmp
memory/212-1-0x00000000005A0000-0x00000000005A6000-memory.dmp
memory/212-2-0x00000000005C0000-0x00000000005C6000-memory.dmp
memory/212-9-0x00000000005A0000-0x00000000005A6000-memory.dmp
memory/212-18-0x0000000008000000-0x000000000800E000-memory.dmp
memory/372-19-0x0000000008000000-0x000000000800E000-memory.dmp
memory/372-21-0x0000000000760000-0x0000000000766000-memory.dmp
memory/372-27-0x0000000000740000-0x0000000000746000-memory.dmp
memory/372-28-0x0000000008000000-0x000000000800E000-memory.dmp