Analysis
- max time kernel
150s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
13/06/2024, 19:18
General
- Target 2024-06-13_d269885ea6cd661083a3c3c469bc2b7d_cryptolocker.exe
- Size 40KB
- Sample240613-xzzykasekn
- SHA256 2d9b74bca8c67b4df2277e895821fb1cef1e899430c7641ed347d9ce1651389c
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_d269885ea6cd661083a3c3c469bc2b7d_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-13_d269885ea6cd661083a3c3c469bc2b7d_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/880-18-0x0000000000500000-0x0000000000510000-memory.dmp
memory/880-20-0x00000000006D0000-0x00000000006D6000-memory.dmp
memory/880-26-0x00007FF834430000-0x00007FF834625000-memory.dmp
memory/880-27-0x0000000000500000-0x0000000000510000-memory.dmp
memory/880-29-0x00007FF834430000-0x00007FF834625000-memory.dmp
memory/1416-0-0x0000000000500000-0x0000000000510000-memory.dmp
memory/1416-1-0x00000000006A0000-0x00000000006A6000-memory.dmp
memory/1416-2-0x00000000006C0000-0x00000000006C6000-memory.dmp
memory/1416-9-0x00007FF834430000-0x00007FF834625000-memory.dmp
memory/1416-17-0x0000000000500000-0x0000000000510000-memory.dmp