Analysis
- max time kernel
147s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
03/06/2024, 00:15
General
- Target 2024-06-02_8d7bdd647c6ee15809daf0391b1539a8_cryptolocker.exe
- Size 39KB
- Sample240603-aj15cscc5w
- SHA256 618df90e9dc15f8675549875c63f822079476f08bc2b03b3735815fa4677252b
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\2024-06-02_8d7bdd647c6ee15809daf0391b1539a8_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-02_8d7bdd647c6ee15809daf0391b1539a8_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=4200,i,13035806169561352434,1332896185314862791,262144 --variations-seed-version --mojo-platform-channel-handle=4244 /prefetch:81⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
asih.exe
memory/2972-18-0x0000000000500000-0x0000000000510000-memory.dmp
memory/2972-20-0x0000000002100000-0x0000000002106000-memory.dmp
memory/2972-26-0x00000000004E0000-0x00000000004E6000-memory.dmp
memory/2972-27-0x0000000000500000-0x0000000000510000-memory.dmp
memory/4824-0-0x0000000000500000-0x0000000000510000-memory.dmp
memory/4824-1-0x0000000000520000-0x0000000000526000-memory.dmp
memory/4824-2-0x00000000020F0000-0x00000000020F6000-memory.dmp
memory/4824-9-0x0000000000520000-0x0000000000526000-memory.dmp
memory/4824-17-0x0000000000500000-0x0000000000510000-memory.dmp