Analysis
- max time kernel
150s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
14/06/2024, 01:02
General
- Target 2024-06-14_d362e9bfd432666fce0d8c789cad7c3d_cryptolocker.exe
- Size 39KB
- Sample240614-bdsrgasekr
- SHA256 a3fb58007932cfb825db74b4f4d58206a30724c50a2c1395c03749d35755e683
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\2024-06-14_d362e9bfd432666fce0d8c789cad7c3d_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-14_d362e9bfd432666fce0d8c789cad7c3d_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=4356,i,4686244434963378549,11462511444150484980,262144 --variations-seed-version --mojo-platform-channel-handle=3656 /prefetch:81⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
asih.exe
memory/4616-17-0x0000000000500000-0x000000000050F000-memory.dmp
memory/4616-21-0x00000000004F0000-0x00000000004F6000-memory.dmp
memory/4616-27-0x00000000004D0000-0x00000000004D6000-memory.dmp
memory/4616-28-0x0000000000500000-0x000000000050F000-memory.dmp
memory/5056-0-0x0000000000500000-0x000000000050F000-memory.dmp
memory/5056-1-0x00000000005A0000-0x00000000005A6000-memory.dmp
memory/5056-2-0x00000000005C0000-0x00000000005C6000-memory.dmp
memory/5056-9-0x00000000005A0000-0x00000000005A6000-memory.dmp
memory/5056-19-0x0000000000500000-0x000000000050F000-memory.dmp