Analysis
- max time kernel
148s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
01/06/2024, 13:28
General
- Target 2024-06-01_39c80e2e930cacb2f6847b59beff1516_cryptolocker.exe
- Size 40KB
- Sample240601-qq43ladd71
- SHA256 cb453271b7dc726163c4ce7970afeed4f9845fbcb2d93e7e235c44e42bd6a4c3
Malware Config
Signatures
- Detection of CryptoLocker Variants 5 IoCs
- Detection of Cryptolocker Samples 5 IoCs
- UPX dump on OEP (original entry point) 5 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 5 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\2024-06-01_39c80e2e930cacb2f6847b59beff1516_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-01_39c80e2e930cacb2f6847b59beff1516_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 --field-trial-handle=4572,i,1697479186275492802,18058102846092193784,262144 --variations-seed-version --mojo-platform-channel-handle=4404 /prefetch:81⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
asih.exe
memory/3908-19-0x0000000000500000-0x0000000000510000-memory.dmp
memory/3908-21-0x00000000005E0000-0x00000000005E6000-memory.dmp
memory/3908-27-0x00000000004E0000-0x00000000004E6000-memory.dmp
memory/3908-28-0x0000000000500000-0x0000000000510000-memory.dmp
memory/4896-0-0x0000000000500000-0x0000000000510000-memory.dmp
memory/4896-1-0x00000000004D0000-0x00000000004D6000-memory.dmp
memory/4896-9-0x00000000004D0000-0x00000000004D6000-memory.dmp
memory/4896-2-0x00000000004F0000-0x00000000004F6000-memory.dmp
memory/4896-18-0x0000000000500000-0x0000000000510000-memory.dmp