Analysis
- max time kernel
149s - max time network
152s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
25/05/2024, 02:34
General
- Target 2024-05-25_30d6b602758c18b0275f026bc40f146c_cryptolocker.exe
- Size 95KB
- Sample240525-c2gjsabg39
- SHA256 9c337cc5f31f5eab541cb6d6b1a7f6591559f8eeb28a51171b00dc552f9734e1
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_30d6b602758c18b0275f026bc40f146c_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-25_30d6b602758c18b0275f026bc40f146c_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=5240 --field-trial-handle=3240,i,13319578961094268484,16557498665191861597,262144 --variations-seed-version /prefetch:81⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
asih.exe
memory/4652-18-0x00000000006B0000-0x00000000006B6000-memory.dmp
memory/4652-19-0x0000000000860000-0x0000000000866000-memory.dmp
memory/4652-27-0x0000000000500000-0x000000000050F000-memory.dmp
memory/4888-0-0x0000000000500000-0x000000000050F000-memory.dmp
memory/4888-1-0x00000000004F0000-0x00000000004F6000-memory.dmp
memory/4888-2-0x00000000004F0000-0x00000000004F6000-memory.dmp
memory/4888-3-0x00000000005A0000-0x00000000005A6000-memory.dmp
memory/4888-26-0x0000000000500000-0x000000000050F000-memory.dmp