Analysis
- max time kernel
149s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20260513-en - resource tags
- submitted
04/08/2026, 17:37
General
- Target 2026-08-04_ecf60e65b2a43ac6051ba471951f6eca_cryptolocker_elex.exe
- Size 56KB
- Sample260804-v65fhsar5w
- SHA256 7956ff39072df63931d527729534fc15400ca2ee63b903e9ef2dd8ce2afe0ca8
Malware Config
Signatures
- Detection of CryptoLocker Variants 3 IoCs
- UPX dump on OEP (original entry point) 3 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 3 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).
- System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Suspicious use of WriteProcessMemory 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\2026-08-04_ecf60e65b2a43ac6051ba471951f6eca_cryptolocker_elex.exe"C:\Users\Admin\AppData\Local\Temp\2026-08-04_ecf60e65b2a43ac6051ba471951f6eca_cryptolocker_elex.exe"1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\rewok.exe"C:\Users\Admin\AppData\Local\Temp\rewok.exe"2⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
rewok.exe
memory/2624-19-0x0000000000400000-0x000000000040E000-memory.dmp
memory/2624-22-0x0000000000400000-0x000000000040E000-memory.dmp
memory/4432-0-0x0000000000400000-0x000000000040E000-memory.dmp
memory/4432-1-0x0000000000404000-0x0000000000405000-memory.dmp
memory/4432-2-0x0000000002150000-0x0000000002156000-memory.dmp
memory/4432-3-0x0000000000400000-0x000000000040E000-memory.dmp
memory/4432-4-0x0000000000400000-0x0000000000406000-memory.dmp