Analysis
- max time kernel
149s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20240426-en - resource tags
- submitted
30/05/2024, 03:48
General
- Target 2024-05-30_595a942ff8efd1bfe7ef703941f3f4b0_cryptolocker.exe
- Size 97KB
- Sample240530-edasfadd5t
- SHA256 daea8971d64c9d1d644b96ccb374122aa620ee6b99ec5eb2a80d5272069c304b
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\2024-05-30_595a942ff8efd1bfe7ef703941f3f4b0_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-30_595a942ff8efd1bfe7ef703941f3f4b0_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/2076-18-0x0000000000500000-0x000000000050F000-memory.dmp
memory/2076-20-0x00000000005D0000-0x00000000005D6000-memory.dmp
memory/2076-26-0x00000000005B0000-0x00000000005B6000-memory.dmp
memory/2076-27-0x0000000000500000-0x000000000050F000-memory.dmp
memory/3196-0-0x0000000000500000-0x000000000050F000-memory.dmp
memory/3196-1-0x00000000004A0000-0x00000000004A6000-memory.dmp
memory/3196-2-0x0000000000670000-0x0000000000676000-memory.dmp
memory/3196-9-0x00000000004A0000-0x00000000004A6000-memory.dmp
memory/3196-17-0x0000000000500000-0x000000000050F000-memory.dmp