Technical Information
To ensure autorun and distribution
Modifies the following registry keys
- [<HKLM>\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run] 'UDP Subsystem' = '%ProgramFiles(x86)%\UDP Subsystem\udpss.exe'
Creates or modifies the following files
- <SYSTEM32>\tasks\udp subsystem
- <SYSTEM32>\tasks\udp subsystem task
Malicious functions
Injects code into
the following system processes:
- %WINDIR%\microsoft.net\framework\v4.0.30319\installutil.exe
Modifies file system
Creates the following files
- %APPDATA%\36d1130a-ac2e-44f7-9dc1-e424fbcbe0ee\run.dat
- %ProgramFiles(x86)%\udp subsystem\udpss.exe
- %TEMP%\tmp7a14.tmp
- %APPDATA%\36d1130a-ac2e-44f7-9dc1-e424fbcbe0ee\task.dat
- %TEMP%\tmp7d8f.tmp
Deletes the following files
- %TEMP%\tmp7a14.tmp
- %TEMP%\tmp7d8f.tmp
Network activity
Connects to
- 'qo#####.ddnsfree.com':9035
UDP
- DNS ASK qo#####.ddnsfree.com
Miscellaneous
Executes the following
- '%WINDIR%\microsoft.net\framework\v4.0.30319\installutil.exe'
- '%WINDIR%\syswow64\schtasks.exe' /create /f /tn "UDP Subsystem" /xml "%TEMP%\tmp7A14.tmp"
- '%WINDIR%\syswow64\schtasks.exe' /create /f /tn "UDP Subsystem Task" /xml "%TEMP%\tmp7D8F.tmp"
