Analysis
- max time kernel
150s - max time network
152s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
12/06/2024, 18:48
General
- Target 2024-06-12_e55dea4e5c309e1b9cdeaef9207fb1c8_cryptolocker.exe
- Size 40KB
- Sample240612-xf2caawbja
- SHA256 14228708c7aa29be6d2ea0431b8b7f67194d4eb72b49fa15c0c9541e83f6e96e
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\2024-06-12_e55dea4e5c309e1b9cdeaef9207fb1c8_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-12_e55dea4e5c309e1b9cdeaef9207fb1c8_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/940-19-0x0000000000500000-0x0000000000510000-memory.dmp
memory/940-21-0x00000000005B0000-0x00000000005B6000-memory.dmp
memory/940-22-0x00000000005D0000-0x00000000005D6000-memory.dmp
memory/940-28-0x0000000000500000-0x0000000000510000-memory.dmp
memory/3048-0-0x0000000000500000-0x0000000000510000-memory.dmp
memory/3048-1-0x00000000006B0000-0x00000000006B6000-memory.dmp
memory/3048-2-0x00000000006B0000-0x00000000006B6000-memory.dmp
memory/3048-3-0x0000000002070000-0x0000000002076000-memory.dmp
memory/3048-18-0x0000000000500000-0x0000000000510000-memory.dmp