Analysis
- max time kernel
88s - max time network
126s - platform
windows10-2004_x64 - resource
win10v2004-20231215-en - resource tags
- submitted
12/02/2024, 20:16
General
- Target 2024-02-12_b79a4e75df2da2815132a6cbaf923cfb_cryptolocker.exe
- Size 80KB
- Sample240212-y19d3adb99
- SHA256 41418def11f5b00dd2d4d4e70798f5c9d5dd92c41db66043d1354697b770deb2
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 2 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\2024-02-12_b79a4e75df2da2815132a6cbaf923cfb_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-12_b79a4e75df2da2815132a6cbaf923cfb_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\misid.exe"C:\Users\Admin\AppData\Local\Temp\misid.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
misid.exe
memory/2348-0-0x0000000000500000-0x0000000000510000-memory.dmp
memory/2348-1-0x00000000005A0000-0x00000000005A6000-memory.dmp
memory/2348-3-0x00000000005C0000-0x00000000005C6000-memory.dmp
memory/2348-2-0x00000000005A0000-0x00000000005A6000-memory.dmp
memory/2348-18-0x0000000000500000-0x0000000000510000-memory.dmp
memory/3340-17-0x0000000000500000-0x0000000000510000-memory.dmp
memory/3340-20-0x0000000000660000-0x0000000000666000-memory.dmp
memory/3340-26-0x00000000004D0000-0x00000000004D6000-memory.dmp
memory/3340-55-0x0000000000500000-0x0000000000510000-memory.dmp