Analysis
- max time kernel
132s - max time network
153s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
14/03/2024, 10:34
General
- Target 2024-03-14_5b1952fa40ba7aa71bd5b757b7912841_cryptolocker.exe
- Size 78KB
- Sample240314-mmcbmaca92
- SHA256 34ef0e22c2418e90a16c3e0fbd73d978ec3c27e2563fd9b6f953b3c1a13fcdf4
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\2024-03-14_5b1952fa40ba7aa71bd5b757b7912841_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-03-14_5b1952fa40ba7aa71bd5b757b7912841_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\misid.exe"C:\Users\Admin\AppData\Local\Temp\misid.exe"2⤵
- Executes dropped EXE
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
misid.exe
memory/3184-17-0x0000000000500000-0x0000000000510000-memory.dmp
memory/3184-22-0x00000000005A0000-0x00000000005A6000-memory.dmp
memory/3184-20-0x00000000006C0000-0x00000000006C6000-memory.dmp
memory/3184-27-0x0000000000500000-0x0000000000510000-memory.dmp
memory/4304-0-0x0000000000500000-0x0000000000510000-memory.dmp
memory/4304-1-0x00000000004D0000-0x00000000004D6000-memory.dmp
memory/4304-2-0x00000000004D0000-0x00000000004D6000-memory.dmp
memory/4304-3-0x00000000004F0000-0x00000000004F6000-memory.dmp
memory/4304-19-0x0000000000500000-0x0000000000510000-memory.dmp