Analysis
- max time kernel
148s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20240426-en - resource tags
- submitted
29/05/2024, 06:54
General
- Target 2024-05-29_cb44779f8ae1af12f757e290154082a3_cryptolocker.exe
- Size 40KB
- Sample240529-hpg8faea9y
- SHA256 77eaee4f51e2e845337dbf2027f1c2739caec77fb984fb6f7a3c0549dd53c83c
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\2024-05-29_cb44779f8ae1af12f757e290154082a3_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-29_cb44779f8ae1af12f757e290154082a3_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
Loading Replay Monitor...
Downloads
asih.exe
memory/1896-0-0x0000000000500000-0x0000000000510000-memory.dmp
memory/1896-1-0x00000000005A0000-0x00000000005A6000-memory.dmp
memory/1896-2-0x00000000005C0000-0x00000000005C6000-memory.dmp
memory/1896-9-0x00000000005A0000-0x00000000005A6000-memory.dmp
memory/1896-17-0x0000000000500000-0x0000000000510000-memory.dmp
memory/4264-18-0x0000000000500000-0x0000000000510000-memory.dmp
memory/4264-20-0x00000000005D0000-0x00000000005D6000-memory.dmp
memory/4264-26-0x0000000000560000-0x0000000000566000-memory.dmp
memory/4264-27-0x0000000000500000-0x0000000000510000-memory.dmp