Analysis
- max time kernel
150s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
03/06/2024, 11:27
General
- Target 2024-06-03_3118020d19f1da306816443e1861fa6f_cryptolocker.exe
- Size 53KB
- Sample240603-nkxp8aeb24
- SHA256 faaf7d478854d36a9e4d1e38ecbf6169b2f3714d3f42121c06ff8ff9003fe433
Malware Config
Signatures
- Detection of CryptoLocker Variants 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\2024-06-03_3118020d19f1da306816443e1861fa6f_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-03_3118020d19f1da306816443e1861fa6f_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\lossy.exe"C:\Users\Admin\AppData\Local\Temp\lossy.exe"2⤵
- Executes dropped EXE
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
lossy.exe
memory/4604-16-0x0000000008000000-0x000000000800F000-memory.dmp
memory/4604-20-0x0000000002060000-0x0000000002066000-memory.dmp
memory/4604-26-0x00000000004D0000-0x00000000004D6000-memory.dmp
memory/4604-27-0x0000000008000000-0x000000000800F000-memory.dmp
memory/4764-0-0x0000000008000000-0x000000000800F000-memory.dmp
memory/4764-1-0x0000000002130000-0x0000000002136000-memory.dmp
memory/4764-2-0x0000000002040000-0x0000000002046000-memory.dmp
memory/4764-9-0x0000000002130000-0x0000000002136000-memory.dmp
memory/4764-18-0x0000000008000000-0x000000000800F000-memory.dmp