Analysis
- max time kernel
152s - max time network
162s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
26/05/2024, 03:45
General
- Target 2024-05-26_8376eccb9bac9057a8f54db71ccd9d34_cryptolocker.exe
- Size 40KB
- Sample240526-ea6eyaed88
- SHA256 e0d6b2dc1d64ce71930e51c5a801ff47f5e2c858044731a3f3051d7c51b83038
Malware Config
Signatures
- Detection of CryptoLocker Variants 4 IoCs
- Detection of Cryptolocker Samples 4 IoCs
- UPX dump on OEP (original entry point) 4 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 4 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\2024-05-26_8376eccb9bac9057a8f54db71ccd9d34_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-26_8376eccb9bac9057a8f54db71ccd9d34_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
-
-
C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1348 --field-trial-handle=2280,i,716736634476467098,11449718822158202904,262144 --variations-seed-version /prefetch:81⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
asih.exe
memory/2228-19-0x0000000000620000-0x0000000000626000-memory.dmp
memory/2228-20-0x0000000000750000-0x0000000000756000-memory.dmp
memory/2228-21-0x0000000000750000-0x0000000000756000-memory.dmp
memory/2228-27-0x0000000000500000-0x0000000000510000-memory.dmp
memory/3508-0-0x0000000000500000-0x0000000000510000-memory.dmp
memory/3508-1-0x0000000002280000-0x0000000002286000-memory.dmp
memory/3508-2-0x0000000002280000-0x0000000002286000-memory.dmp
memory/3508-3-0x00000000021A0000-0x00000000021A6000-memory.dmp
memory/3508-10-0x0000000000500000-0x0000000000510000-memory.dmp