Analysis
- max time kernel
148s - max time network
157s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
21/05/2024, 15:36
General
- Target 2024-05-21_575f7f0102adcf4a00acd3efd8b05c5a_cryptolocker.exe
- Size 59KB
- Sample240521-s17btaae93
- SHA256 066fc54d79acb5e4c2e55d494422d2650b8df2e0e5327cd4a0b7b932781f79fb
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\2024-05-21_575f7f0102adcf4a00acd3efd8b05c5a_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-21_575f7f0102adcf4a00acd3efd8b05c5a_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/3516-0-0x0000000000500000-0x0000000000510000-memory.dmp
memory/3516-1-0x0000000000560000-0x0000000000566000-memory.dmp
memory/3516-2-0x0000000000560000-0x0000000000566000-memory.dmp
memory/3516-3-0x0000000002070000-0x0000000002076000-memory.dmp
memory/3516-18-0x0000000000500000-0x0000000000510000-memory.dmp
memory/4780-17-0x0000000000500000-0x0000000000510000-memory.dmp
memory/4780-21-0x0000000001F80000-0x0000000001F86000-memory.dmp
memory/4780-20-0x0000000001F50000-0x0000000001F56000-memory.dmp
memory/4780-27-0x0000000000500000-0x0000000000510000-memory.dmp