Analysis
- max time kernel
150s - max time network
149s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
25/05/2024, 03:06
General
- Target 2024-05-25_ebde48c3fa79b81a215b45b4c3873cb9_cryptolocker.exe
- Size 26KB
- Sample240525-dl92tscd6w
- SHA256 33f31b511e60869db8105100127c9875287a4b3ba70f7bfb16c67ee0c5bb606a
Malware Config
Signatures
- Detection of CryptoLocker Variants 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\2024-05-25_ebde48c3fa79b81a215b45b4c3873cb9_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-25_ebde48c3fa79b81a215b45b4c3873cb9_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\lossy.exe"C:\Users\Admin\AppData\Local\Temp\lossy.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=4020,i,13544508926340531097,6671217806016090640,262144 --variations-seed-version --mojo-platform-channel-handle=4240 /prefetch:81⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
lossy.exe
memory/376-0-0x0000000008000000-0x000000000800E000-memory.dmp
memory/376-1-0x00000000005B0000-0x00000000005B6000-memory.dmp
memory/376-2-0x00000000005D0000-0x00000000005D6000-memory.dmp
memory/376-9-0x00000000005B0000-0x00000000005B6000-memory.dmp
memory/376-18-0x0000000008000000-0x000000000800E000-memory.dmp
memory/1656-16-0x0000000008000000-0x000000000800E000-memory.dmp
memory/1656-21-0x0000000002070000-0x0000000002076000-memory.dmp
memory/1656-27-0x0000000002040000-0x0000000002046000-memory.dmp
memory/1656-28-0x0000000008000000-0x000000000800E000-memory.dmp