Analysis
- max time kernel
159s - max time network
166s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
06/03/2024, 06:30
General
- Target 2024-03-06_bc4688f81aa04e459784edcc51a9f7f7_cryptolocker.exe
- Size 104KB
- Sample240306-g9mg8aed36
- SHA256 116e8273250e7a1c8aec667d93e9c1ff65770bf14254939ccd70ddac6e42165c
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\2024-03-06_bc4688f81aa04e459784edcc51a9f7f7_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-03-06_bc4688f81aa04e459784edcc51a9f7f7_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/1092-0-0x0000000000500000-0x000000000050F311-memory.dmp
memory/1092-1-0x00000000006A0000-0x00000000006A6000-memory.dmp
memory/1092-2-0x00000000006A0000-0x00000000006A6000-memory.dmp
memory/1092-3-0x0000000000750000-0x0000000000756000-memory.dmp
memory/1092-18-0x0000000000500000-0x000000000050F311-memory.dmp
memory/3200-17-0x0000000000500000-0x000000000050F311-memory.dmp
memory/3200-20-0x00000000004F0000-0x00000000004F6000-memory.dmp
memory/3200-25-0x00000000004D0000-0x00000000004D6000-memory.dmp
memory/3200-27-0x0000000000500000-0x000000000050F311-memory.dmp