Analysis
- max time kernel
149s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
01/06/2024, 18:24
General
- Target 2024-06-01_3a21b5f9575cdd7e23ffd161ebd90fdf_cryptolocker.exe
- Size 40KB
- Sample240601-w2ff9sbf89
- SHA256 4809c3855ab1b76698bb6d7ee0d8a1745c6d15236e4981ec58c4b4ebc4e932a9
Malware Config
Signatures
- Detection of CryptoLocker Variants 5 IoCs
- Detection of Cryptolocker Samples 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\2024-06-01_3a21b5f9575cdd7e23ffd161ebd90fdf_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-01_3a21b5f9575cdd7e23ffd161ebd90fdf_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/1952-0-0x0000000000500000-0x0000000000510000-memory.dmp
memory/1952-1-0x0000000000620000-0x0000000000626000-memory.dmp
memory/1952-2-0x0000000000650000-0x0000000000656000-memory.dmp
memory/1952-9-0x0000000000620000-0x0000000000626000-memory.dmp
memory/1952-18-0x0000000000500000-0x0000000000510000-memory.dmp
memory/3040-19-0x0000000000500000-0x0000000000510000-memory.dmp
memory/3040-21-0x0000000000820000-0x0000000000826000-memory.dmp
memory/3040-27-0x0000000000660000-0x0000000000666000-memory.dmp
memory/3040-28-0x0000000000500000-0x0000000000510000-memory.dmp