Analysis
- max time kernel
150s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20240426-en - resource tags
- submitted
27/05/2024, 18:26
General
- Target 2024-05-27_3eed62ab5b309e077a6fd6161a27caa3_cryptolocker.exe
- Size 40KB
- Sample240527-w3prbsec73
- SHA256 f7921d5b497c54ade3c82381df4d163e5a20cfaf9ff60d938edd92815d361031
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\2024-05-27_3eed62ab5b309e077a6fd6161a27caa3_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-27_3eed62ab5b309e077a6fd6161a27caa3_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/716-18-0x0000000000500000-0x0000000000510000-memory.dmp
memory/716-20-0x00000000020F0000-0x00000000020F6000-memory.dmp
memory/716-26-0x00000000005B0000-0x00000000005B6000-memory.dmp
memory/716-27-0x0000000000500000-0x0000000000510000-memory.dmp
memory/1948-1-0x00000000006B0000-0x00000000006B6000-memory.dmp
memory/1948-0-0x0000000000500000-0x0000000000510000-memory.dmp
memory/1948-2-0x0000000002070000-0x0000000002076000-memory.dmp
memory/1948-9-0x00000000006B0000-0x00000000006B6000-memory.dmp
memory/1948-17-0x0000000000500000-0x0000000000510000-memory.dmp