Analysis
- max time kernel
148s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
01/06/2024, 18:18
General
- Target 2024-06-01_eabe7f378a2d5d0b613b1aa1acbd537c_cryptolocker.exe
- Size 60KB
- Sample240601-wxt4vsag6t
- SHA256 888a0b1b9506b19160e8eef9e0e473caf163b080edcb2de3ab8fb45e1935808c
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_eabe7f378a2d5d0b613b1aa1acbd537c_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-01_eabe7f378a2d5d0b613b1aa1acbd537c_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=3772,i,11746347647270949551,7786733067759450703,262144 --variations-seed-version --mojo-platform-channel-handle=4292 /prefetch:81⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
asih.exe
memory/2704-0-0x0000000000500000-0x0000000000510000-memory.dmp
memory/2704-1-0x0000000002050000-0x0000000002056000-memory.dmp
memory/2704-2-0x0000000002070000-0x0000000002076000-memory.dmp
memory/2704-9-0x0000000002050000-0x0000000002056000-memory.dmp
memory/2704-18-0x0000000000500000-0x0000000000510000-memory.dmp
memory/4732-17-0x0000000000500000-0x0000000000510000-memory.dmp
memory/4732-20-0x00000000005E0000-0x00000000005E6000-memory.dmp
memory/4732-26-0x00000000004E0000-0x00000000004E6000-memory.dmp
memory/4732-27-0x0000000000500000-0x0000000000510000-memory.dmp