Analysis
- max time kernel
144s - max time network
158s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
25/05/2024, 02:43
General
- Target 2024-05-25_72ab2e26b77c11d90272f1c5a539d192_cryptolocker.exe
- Size 74KB
- Sample240525-c7st1aca53
- SHA256 229c9ec194154c33b18d61af1aca12ed84413d9f179dd82d4cf30ab50c295442
Score
9/10
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\2024-05-25_72ab2e26b77c11d90272f1c5a539d192_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-25_72ab2e26b77c11d90272f1c5a539d192_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=4172 --field-trial-handle=2264,i,15001568551143786084,90255922961447677,262144 --variations-seed-version /prefetch:81⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
asih.exe
memory/8-0-0x0000000000500000-0x000000000050F311-memory.dmp
memory/8-1-0x00000000006F0000-0x00000000006F6000-memory.dmp
memory/8-2-0x00000000006F0000-0x00000000006F6000-memory.dmp
memory/8-3-0x0000000000710000-0x0000000000716000-memory.dmp
memory/8-25-0x0000000000500000-0x000000000050F311-memory.dmp
memory/4780-18-0x0000000000620000-0x0000000000626000-memory.dmp
memory/4780-19-0x0000000000750000-0x0000000000756000-memory.dmp
memory/4780-26-0x0000000000500000-0x000000000050F311-memory.dmp