Analysis
- max time kernel
148s - max time network
139s - platform
windows10-2004_x64 - resource
win10v2004-20231215-en - resource tags
- submitted
22/12/2023, 01:14
General
- Target 4307ea6dc3759c609a950c11763ebe3e.exe
- Size 209KB
- Sample231222-bl52rsddf7
- SHA256 7582fd4ed2e0b92d254962953083d90b3324d41a3a81ff30f146af4b3ae4e442
Malware Config
Extracted
-
systembc
-
yan0212.com:4039
-
yan0212.net:4039
Signatures
- SystemBC
SystemBC is a proxy and remote administration tool first seen in 2019.
- Executes dropped EXE 1 IoCs
- UPX packed file 1 IoCs
Detects executables packed with UPX/modified UPX open source packer.
- Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Drops file in Windows directory 2 IoCs
- Program crash 1 IoCs
- Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\4307ea6dc3759c609a950c11763ebe3e.exe"C:\Users\Admin\AppData\Local\Temp\4307ea6dc3759c609a950c11763ebe3e.exe"1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1112 -s 9482⤵
- Program crash
-
-
C:\ProgramData\wrmg\swbjmf.exeC:\ProgramData\wrmg\swbjmf.exe start1⤵
- Executes dropped EXE
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 1112 -ip 11121⤵
Network
MITRE ATT&CK Matrix
Replay Monitor
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Downloads
swbjmf.exe
memory/1112-2-0x00000000001C0000-0x00000000001C9000-memory.dmp
memory/1112-1-0x00000000048B0000-0x00000000049B0000-memory.dmp
memory/1112-9-0x0000000000400000-0x00000000045F0000-memory.dmp
memory/1112-14-0x00000000048B0000-0x00000000049B0000-memory.dmp
memory/1112-24-0x0000000000400000-0x00000000045F0000-memory.dmp
memory/3488-11-0x00000000001E0000-0x00000000001E9000-memory.dmp
memory/3488-10-0x00000000046D0000-0x00000000047D0000-memory.dmp
memory/3488-13-0x0000000000400000-0x00000000045F0000-memory.dmp
memory/3488-17-0x00000000046D0000-0x00000000047D0000-memory.dmp