Analysis
- max time kernel
148s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20240611-en - resource tags
- submitted
13/06/2024, 04:29
General
- Target 2024-06-13_8534f7509df38002eeca856635d2b204_cryptolocker.exe
- Size 54KB
- Sample240613-e4k14axgnl
- SHA256 12fbf0edb5382caaed22a5365f26a732cdf1f898fd73e5d933c930d38ba4c2c7
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\2024-06-13_8534f7509df38002eeca856635d2b204_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-13_8534f7509df38002eeca856635d2b204_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/1616-18-0x0000000000500000-0x0000000000510000-memory.dmp
memory/1616-20-0x0000000000510000-0x0000000000516000-memory.dmp
memory/1616-26-0x00000000004D0000-0x00000000004D6000-memory.dmp
memory/1616-27-0x0000000000500000-0x0000000000510000-memory.dmp
memory/4792-0-0x0000000000500000-0x0000000000510000-memory.dmp
memory/4792-1-0x0000000002050000-0x0000000002056000-memory.dmp
memory/4792-2-0x0000000002070000-0x0000000002076000-memory.dmp
memory/4792-9-0x0000000002050000-0x0000000002056000-memory.dmp
memory/4792-17-0x0000000000500000-0x0000000000510000-memory.dmp