Analysis
- max time kernel
147s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20240426-en - resource tags
- submitted
11/06/2024, 01:42
General
- Target 2024-06-11_fb270cf54c97f398be42864f5537e8cc_cryptolocker.exe
- Size 70KB
- Sample240611-b4sjdszelr
- SHA256 dfd1e50523f56d1b6ba6b53989e3294f7fd439f3825ace137fdffeb83fb1e245
Score
9/10
Malware Config
Signatures
- Detection of CryptoLocker Variants 4 IoCs
- Detection of Cryptolocker Samples 4 IoCs
- UPX dump on OEP (original entry point) 4 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 4 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_fb270cf54c97f398be42864f5537e8cc_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-11_fb270cf54c97f398be42864f5537e8cc_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/4020-19-0x00000000004F0000-0x00000000004F6000-memory.dmp
memory/4020-23-0x00000000004D0000-0x00000000004D6000-memory.dmp
memory/4020-26-0x0000000000500000-0x000000000050F000-memory.dmp
memory/4596-0-0x0000000000500000-0x000000000050F000-memory.dmp
memory/4596-1-0x00000000006B0000-0x00000000006B6000-memory.dmp
memory/4596-2-0x00000000006D0000-0x00000000006D6000-memory.dmp
memory/4596-9-0x00000000006B0000-0x00000000006B6000-memory.dmp
memory/4596-16-0x0000000000500000-0x000000000050F000-memory.dmp