Analysis
- max time kernel
141s - max time network
143s - platform
windows10-2004_x64 - resource
win10v2004-20241007-en - resource tags
- submitted
06/01/2025, 23:29
General
- Target JaffaCakes118_40b2fef6d047ce116da6000629f4b701.exe
- Size 209KB
- Sample250106-3gr3wssqct
- SHA256 f8b51295b62ca45e67e51b96bec09b57c4164173f13985f7b34d9a7e35e7cecb
Malware Config
Extracted
-
systembc
-
yan0212.com:4039
-
yan0212.net:4039
Signatures
- SystemBC
SystemBC is a proxy and remote administration tool first seen in 2019.
- Systembc family
- Executes dropped EXE 1 IoCs
- Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- UPX packed file 2 IoCs
Detects executables packed with UPX/modified UPX open source packer.
- Drops file in Windows directory 2 IoCs
- Program crash 1 IoCs
- System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40b2fef6d047ce116da6000629f4b701.exe"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40b2fef6d047ce116da6000629f4b701.exe"1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1256 -s 9482⤵
- Program crash
-
-
C:\ProgramData\jrbw\jmbn.exeC:\ProgramData\jrbw\jmbn.exe start1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1256 -ip 12561⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
jmbn.exe
memory/1256-1-0x0000000000400000-0x00000000045F0000-memory.dmp
memory/1256-2-0x00000000001C0000-0x00000000001C9000-memory.dmp
memory/1256-3-0x0000000000400000-0x000000000040B000-memory.dmp
memory/1256-4-0x0000000000400000-0x00000000045F0000-memory.dmp
memory/1256-24-0x0000000000400000-0x00000000045F0000-memory.dmp
memory/1256-25-0x0000000000400000-0x000000000040B000-memory.dmp
memory/2356-13-0x0000000000400000-0x00000000045F0000-memory.dmp