Analysis
- max time kernel
149s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20240426-en - resource tags
- submitted
25/05/2024, 02:43
General
- Target 2024-05-25_70ea84e6d93808b878592b6c0fad25b2_cryptolocker.exe
- Size 39KB
- Sample240525-c7n6tabg41
- SHA256 5fd21708e5c70731890b15f84a45776b84bfd29fbb7cda91b5877584aaa23f5d
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\2024-05-25_70ea84e6d93808b878592b6c0fad25b2_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-25_70ea84e6d93808b878592b6c0fad25b2_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
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
asih.exe
memory/1276-0-0x0000000000500000-0x0000000000510000-memory.dmp
memory/1276-1-0x00000000004E0000-0x00000000004E6000-memory.dmp
memory/1276-2-0x0000000000590000-0x0000000000596000-memory.dmp
memory/1276-9-0x00000000004E0000-0x00000000004E6000-memory.dmp
memory/1276-18-0x0000000000500000-0x0000000000510000-memory.dmp
memory/1364-17-0x0000000000500000-0x0000000000510000-memory.dmp
memory/1364-26-0x00000000004D0000-0x00000000004D6000-memory.dmp
memory/1364-20-0x00000000004F0000-0x00000000004F6000-memory.dmp
memory/1364-27-0x0000000000500000-0x0000000000510000-memory.dmp