Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '57bc04784935e5387d6fbbefa1be8037' = '"%TEMP%\sn.exe" ..'
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '57bc04784935e5387d6fbbefa1be8037' = '"%TEMP%\sn.exe" ..'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'WinUpdat' = 'wscript.exe //B "%TEMP%\WinUpdat.vbs"'
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'WinUpdat' = 'wscript.exe //B "%TEMP%\WinUpdat.vbs"'
Creates or modifies the following files:
- %HOMEPATH%\Start Menu\Programs\Startup\57bc04784935e5387d6fbbefa1be8037.exe
- %HOMEPATH%\Start Menu\Programs\Startup\WinUpdat.vbs
Creates the following files on removable media:
- <Drive name for removable media>:\WinUpdat.vbs
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%TEMP%\sn.exe' = '%TEMP%\sn.exe:*:Enabled:sn.exe'
Executes the following:
- '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%TEMP%\sn.exe" "sn.exe" ENABLE
Modifies file system:
Creates the following files:
- %TEMP%\WinUpdat.vbs
- %TEMP%\sn.exe
- %TEMP%\aut2.tmp
- %TEMP%\aut1.tmp
- %TEMP%\WinUpdat.exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\WinUpdat.vbs
Deletes the following files:
- %TEMP%\aut2.tmp
- %TEMP%\aut1.tmp
Network activity:
Connects to:
- 'localhost':1041
- 'ru######racker99.ddns.net':1177
UDP:
- DNS ASK ru######racker99.ddns.net
Miscellaneous:
Creates and executes the following:
- '%TEMP%\sn.exe'
- '<SYSTEM32>\wscript.exe' "%TEMP%\WinUpdat.vbs"
- '%TEMP%\WinUpdat.exe'
