Analysis
- max time kernel
149s - max time network
157s - platform
windows10-2004_x64 - resource
win10v2004-20240426-en - resource tags
- submitted
28/05/2024, 06:26
General
- Target 2024-05-28_81469c4b6a063e65c8fd30b0a53bf907_cryptolocker.exe
- Size 75KB
- Sample240528-g7jcsaae44
- SHA256 2e774dd4f86bf586475d40e7cb317b1d000b5aa38e212ef32cacbcece17a362c
Score
9/10
Malware Config
Signatures
- Detection of CryptoLocker Variants 4 IoCs
- Detection of Cryptolocker Samples 4 IoCs
- UPX dump on OEP (original entry point) 4 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 4 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\2024-05-28_81469c4b6a063e65c8fd30b0a53bf907_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-28_81469c4b6a063e65c8fd30b0a53bf907_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
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Downloads
asih.exe
memory/424-0-0x0000000000500000-0x000000000050F311-memory.dmp
memory/424-1-0x00000000004D0000-0x00000000004D6000-memory.dmp
memory/424-2-0x00000000004F0000-0x00000000004F6000-memory.dmp
memory/424-9-0x00000000004D0000-0x00000000004D6000-memory.dmp
memory/424-17-0x0000000000500000-0x000000000050F311-memory.dmp
memory/4460-19-0x0000000001FF0000-0x0000000001FF6000-memory.dmp
memory/4460-25-0x0000000000840000-0x0000000000846000-memory.dmp
memory/4460-26-0x0000000000500000-0x000000000050F311-memory.dmp