Analysis
- max time kernel
148s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
05/04/2024, 11:36
General
- Target 2024-04-05_1fd53d3e8cc96fb13e3fdfeed319bce1_cryptolocker.exe
- Size 50KB
- Sample240405-nqwecabc59
- SHA256 e99ba9eaa17821d34170e44a1b1927a02e713cc68ea9d1b4c1ce92308950e279
Score
9/10
Malware Config
Signatures
- Detection of CryptoLocker Variants 4 IoCs
- Detection of Cryptolocker Samples 4 IoCs
- UPX dump on OEP (original entry point) 4 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 4 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\2024-04-05_1fd53d3e8cc96fb13e3fdfeed319bce1_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-05_1fd53d3e8cc96fb13e3fdfeed319bce1_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/4136-19-0x00000000006C0000-0x00000000006C6000-memory.dmp
memory/4136-25-0x00000000006A0000-0x00000000006A6000-memory.dmp
memory/4136-26-0x0000000000500000-0x0000000000510000-memory.dmp
memory/4808-0-0x0000000000500000-0x0000000000510000-memory.dmp
memory/4808-1-0x0000000000830000-0x0000000000836000-memory.dmp
memory/4808-2-0x0000000000830000-0x0000000000836000-memory.dmp
memory/4808-3-0x0000000000850000-0x0000000000856000-memory.dmp
memory/4808-17-0x0000000000500000-0x0000000000510000-memory.dmp