Analysis
- max time kernel
148s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20240426-en - resource tags
- submitted
03/06/2024, 12:33
General
- Target 2024-06-03_9312afdb10b242ae3b0a98b8c2fc80e4_cryptolocker.exe
- Size 90KB
- Sample240603-prjydaee7z
- SHA256 87ad659cc636c72c5265d9957d02e85fbd6d2ca454ff1099f258cead686e1f0c
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\2024-06-03_9312afdb10b242ae3b0a98b8c2fc80e4_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-03_9312afdb10b242ae3b0a98b8c2fc80e4_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/3000-0-0x0000000000500000-0x0000000000510000-memory.dmp
memory/3000-1-0x00000000004E0000-0x00000000004E6000-memory.dmp
memory/3000-2-0x00000000004E0000-0x00000000004E6000-memory.dmp
memory/3000-3-0x00000000005E0000-0x00000000005E6000-memory.dmp
memory/3000-16-0x0000000000500000-0x0000000000510000-memory.dmp
memory/5088-19-0x00000000006E0000-0x00000000006E6000-memory.dmp
memory/5088-25-0x0000000000500000-0x0000000000510000-memory.dmp