Analysis
- max time kernel
148s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
10/06/2024, 06:23
General
- Target 2024-06-10_bac89f39a7ce57918e2643bb14eac1e7_cryptolocker.exe
- Size 60KB
- Sample240610-g5ralsdg96
- SHA256 d99284a8259ecc33e8017a46fd7f977d7cc1278dbd2b60d21036f783d9b53fae
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\2024-06-10_bac89f39a7ce57918e2643bb14eac1e7_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-10_bac89f39a7ce57918e2643bb14eac1e7_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/2340-18-0x0000000000500000-0x0000000000510000-memory.dmp
memory/2340-20-0x00000000006C0000-0x00000000006C6000-memory.dmp
memory/2340-26-0x00000000006A0000-0x00000000006A6000-memory.dmp
memory/2340-27-0x0000000000500000-0x0000000000510000-memory.dmp
memory/4804-0-0x0000000000500000-0x0000000000510000-memory.dmp
memory/4804-1-0x00000000005C0000-0x00000000005C6000-memory.dmp
memory/4804-2-0x00000000005E0000-0x00000000005E6000-memory.dmp
memory/4804-9-0x00000000005C0000-0x00000000005C6000-memory.dmp
memory/4804-17-0x0000000000500000-0x0000000000510000-memory.dmp