Analysis
- max time kernel
149s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20260130-en - resource tags
- submitted
21/04/2026, 04:18
General
- Target 2026-04-21_9a2054429dc5a0d2351438d31fbaf957_cryptolocker_elex.exe
- Size 40KB
- Sample260421-exfssshv8p
- SHA256 3a8b3972569af25962de66403c81043c08560dd728750098b27c29ffeebccbdd
Malware Config
Signatures
- Detection of CryptoLocker Variants 2 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- 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\2026-04-21_9a2054429dc5a0d2351438d31fbaf957_cryptolocker_elex.exe"C:\Users\Admin\AppData\Local\Temp\2026-04-21_9a2054429dc5a0d2351438d31fbaf957_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/2464-0-0x0000000000404000-0x0000000000405000-memory.dmp
memory/2464-1-0x0000000003120000-0x0000000003126000-memory.dmp
memory/2464-2-0x0000000000400000-0x0000000000408000-memory.dmp
memory/2464-3-0x0000000000400000-0x0000000000406000-memory.dmp
memory/2464-19-0x0000000002020000-0x00000000022A1000-memory.dmp
memory/3304-20-0x0000000000400000-0x0000000000408000-memory.dmp
memory/3304-22-0x0000000000400000-0x0000000000408000-memory.dmp
memory/3304-30-0x0000000001FC0000-0x0000000002241000-memory.dmp
memory/3304-42-0x0000000001FC0000-0x0000000002241000-memory.dmp
memory/3304-54-0x0000000001FC0000-0x0000000002241000-memory.dmp