Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Windows SafeAssist' = '%APPDATA%\winlogon.exe'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Windows SafeAssist' = '%APPDATA%\winlogon.exe'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Windows Serivces' = '%APPDATA%\Microsoft\#winhost.exe'
Creates the following files on removable media:
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\driver\info\explorer.exe
- <Drive name for removable media>:\driver\info\Desktop.ini
Malicious functions:
Creates and executes the following:
- %APPDATA%\winlogon.exe
- %APPDATA%\Microsoft\#winhost.exe
Executes the following:
- <SYSTEM32>\reg.exe ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "Windows Serivces" /t REG_SZ /d "%APPDATA%\Microsoft\#winhost.exe" /f
- <SYSTEM32>\cmd.exe /c """%TEMP%\XdGVs.bat"" "
Modifies file system :
Creates the following files:
- %APPDATA%\winlogon.exe
- %APPDATA%\internetfiles213.tmp
- %TEMP%\XdGVs.bat
- %APPDATA%\Microsoft\#winhost.exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\driver\info\explorer.exe
- %APPDATA%\winlogon.exe
- %APPDATA%\Microsoft\#winhost.exe
Network activity:
Connects to:
- 'sa####samvps.info':6667
UDP:
- DNS ASK sa####samvps.info
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: ''