Analysis
- max time kernel
149s - max time network
152s - platform
windows10-2004_x64 - resource
win10v2004-20260130-en - resource tags
- submitted
04/05/2026, 10:01
General
- Target 2026-05-04_d641992db64f111244cf52e88afbacc0_cryptolocker_elex.exe
- Size 55KB
- Sample260504-l2gzzsgs21
- SHA256 33cd6a1c966f55a4d04e403e07911fb243ebf535ab4a373883dd72a9569e673b
Score
9/10
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\2026-05-04_d641992db64f111244cf52e88afbacc0_cryptolocker_elex.exe"C:\Users\Admin\AppData\Local\Temp\2026-05-04_d641992db64f111244cf52e88afbacc0_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/4232-0-0x0000000000400000-0x000000000040E000-memory.dmp
memory/4232-1-0x0000000000404000-0x0000000000405000-memory.dmp
memory/4232-2-0x0000000002E90000-0x0000000002E96000-memory.dmp
memory/4232-3-0x0000000000400000-0x0000000000406000-memory.dmp
memory/4984-19-0x0000000000400000-0x000000000040E000-memory.dmp
memory/4984-21-0x0000000000400000-0x000000000040E000-memory.dmp