Analysis
- max time kernel
150s - max time network
155s - platform
windows10-2004_x64 - resource
win10v2004-20231215-en - resource tags
- submitted
14/02/2024, 15:04
General
- Target 2024-02-14_f7d8c927dab6b1fc46dfba90c72c2e3f_cryptolocker.exe
- Size 127KB
- Sample240214-sfrevsdh5z
- SHA256 fb720fa046b17c6d4e26089678367b74d88744c66fa456371728b66348723601
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\2024-02-14_f7d8c927dab6b1fc46dfba90c72c2e3f_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-14_f7d8c927dab6b1fc46dfba90c72c2e3f_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/3228-17-0x0000000000500000-0x000000000050F000-memory.dmp
memory/3228-20-0x00000000006C0000-0x00000000006C6000-memory.dmp
memory/3228-22-0x00000000006A0000-0x00000000006A6000-memory.dmp
memory/3228-27-0x0000000000500000-0x000000000050F000-memory.dmp
memory/4796-0-0x0000000000500000-0x000000000050F000-memory.dmp
memory/4796-1-0x00000000020D0000-0x00000000020D6000-memory.dmp
memory/4796-2-0x00000000020D0000-0x00000000020D6000-memory.dmp
memory/4796-3-0x0000000002100000-0x0000000002106000-memory.dmp
memory/4796-18-0x0000000000500000-0x000000000050F000-memory.dmp