Analysis
- max time kernel
150s - max time network
146s - platform
windows10-2004_x64 - resource
win10v2004-20240426-en - resource tags
- submitted
06/06/2024, 22:22
General
- Target 2024-06-06_5eb6257906d12256f9a6b66242c335b4_cryptolocker.exe
- Size 53KB
- Sample240606-2af7dacg7s
- SHA256 bdaead9e81a725bdc657be353e8a48f58239a40d15eb7b7650019c86e67f4197
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\2024-06-06_5eb6257906d12256f9a6b66242c335b4_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-06_5eb6257906d12256f9a6b66242c335b4_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/3648-26-0x0000000000590000-0x0000000000596000-memory.dmp
memory/3648-20-0x00000000006C0000-0x00000000006C6000-memory.dmp
memory/3648-18-0x0000000008000000-0x000000000800F000-memory.dmp
memory/3648-27-0x0000000008000000-0x000000000800F000-memory.dmp
memory/4948-0-0x0000000008000000-0x000000000800F000-memory.dmp
memory/4948-1-0x00000000020C0000-0x00000000020C6000-memory.dmp
memory/4948-2-0x00000000020F0000-0x00000000020F6000-memory.dmp
memory/4948-9-0x00000000020C0000-0x00000000020C6000-memory.dmp
memory/4948-17-0x0000000008000000-0x000000000800F000-memory.dmp