Analysis
- max time kernel
150s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
11/06/2024, 01:14
General
- Target 2024-06-11_cd41dad994ae88ad27fe9d660eea357f_cryptolocker.exe
- Size 53KB
- Sample240611-bl4hyayfmp
- SHA256 f8ee28eaf6a1172c9d7ce6bab74af535f67cbea04df9e99807acebe94b54fee4
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\2024-06-11_cd41dad994ae88ad27fe9d660eea357f_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-11_cd41dad994ae88ad27fe9d660eea357f_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/3680-18-0x0000000008000000-0x000000000800F000-memory.dmp
memory/3680-20-0x0000000000660000-0x0000000000666000-memory.dmp
memory/3680-26-0x0000000000640000-0x0000000000646000-memory.dmp
memory/3680-27-0x0000000008000000-0x000000000800F000-memory.dmp
memory/5016-0-0x0000000008000000-0x000000000800F000-memory.dmp
memory/5016-1-0x0000000001FC0000-0x0000000001FC6000-memory.dmp
memory/5016-2-0x0000000001FE0000-0x0000000001FE6000-memory.dmp
memory/5016-9-0x0000000001FC0000-0x0000000001FC6000-memory.dmp
memory/5016-17-0x0000000008000000-0x000000000800F000-memory.dmp