Analysis
- max time kernel
148s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20231215-en - resource tags
- submitted
18/02/2024, 16:58
General
- Target 2024-02-18_dd3b705cf2b7a9c4673f64e274d44447_cryptolocker.exe
- Size 99KB
- Sample240218-vg2y4ace5t
- SHA256 4e46578229bd501acb3ff287ea94d420451fcbf3564fb4d53677ce4ec29e3da9
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\2024-02-18_dd3b705cf2b7a9c4673f64e274d44447_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-18_dd3b705cf2b7a9c4673f64e274d44447_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/996-17-0x0000000000500000-0x000000000050F000-memory.dmp
memory/996-20-0x0000000001F70000-0x0000000001F76000-memory.dmp
memory/996-22-0x0000000001F50000-0x0000000001F56000-memory.dmp
memory/996-27-0x0000000000500000-0x000000000050F000-memory.dmp
memory/4584-0-0x0000000000500000-0x000000000050F000-memory.dmp
memory/4584-1-0x0000000000560000-0x0000000000566000-memory.dmp
memory/4584-2-0x0000000000560000-0x0000000000566000-memory.dmp
memory/4584-3-0x00000000006D0000-0x00000000006D6000-memory.dmp
memory/4584-18-0x0000000000500000-0x000000000050F000-memory.dmp