Analysis
- max time kernel
150s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20240221-en - resource tags
- submitted
22/02/2024, 15:55
General
- Target 2024-02-22_f0c31513da48c09604ef9d4ee8010326_cryptolocker.exe
- Size 39KB
- Sample240222-tcsdesca4s
- SHA256 ecebfa8ad94a9fbd541ba286de569efe14ca8433601460a5e7cd08f8ec76e17a
Score
9/10
Malware Config
Signatures
- Detection of CryptoLocker Variants 1 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- 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\2024-02-22_f0c31513da48c09604ef9d4ee8010326_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-22_f0c31513da48c09604ef9d4ee8010326_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\retln.exe"C:\Users\Admin\AppData\Local\Temp\retln.exe"2⤵
- Executes dropped EXE
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
retln.exe
memory/2224-20-0x0000000002000000-0x0000000002006000-memory.dmp
memory/4736-0-0x0000000002330000-0x0000000002336000-memory.dmp
memory/4736-1-0x0000000002330000-0x0000000002336000-memory.dmp
memory/4736-2-0x0000000000400000-0x0000000000406000-memory.dmp