Technical Information
To ensure autorun and distribution
Creates or modifies the following files
- %APPDATA%\microsoft\windows\start menu\programs\startup\<File name>.exe
Malicious functions
To bypass firewall, removes or modifies the following registry keys
- [<HKLM>\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%APPDATA%\t.exe' = '%APPDATA%\t.exe:*:Enabled:Windows Messanger'
- [<HKLM>\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DoNotAllowExceptions' = '00000000'
- [<HKLM>\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%APPDATA%\svchost.exe' = '%APPDATA%\svchost.exe:*:Enabled:Windows ...
Injects code into
the following user processes:
- svchost.exe
Modifies file system
Creates the following files
- %APPDATA%\svchost.exe
- %TEMP%\zyptff_s.0.cs
- %TEMP%\zyptff_s.cmdline
- %TEMP%\zyptff_s.out
- %TEMP%\cscf464.tmp
- %TEMP%\resf475.tmp
- %TEMP%\zyptff_s.dll
- %APPDATA%\t.exe
- <Current directory>\dns.bat
- %APPDATA%\data.dat
Deletes the following files
- %TEMP%\resf475.tmp
- %TEMP%\cscf464.tmp
- %TEMP%\zyptff_s.out
- %TEMP%\zyptff_s.cmdline
- %TEMP%\zyptff_s.dll
- %TEMP%\zyptff_s.0.cs
- <Current directory>\dns.bat
Modifies the HOSTS file.
Network activity
UDP
- DNS ASK cy#####terat.no-ip.info
Miscellaneous
Creates and executes the following
- '%APPDATA%\svchost.exe'
- '%WINDIR%\microsoft.net\framework\v2.0.50727\csc.exe' /noconfig /fullpaths @"%TEMP%\zyptff_s.cmdline"' (with hidden window)
- '%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RESF475.tmp" "%TEMP%\CSCF464.tmp"' (with hidden window)
- '%WINDIR%\syswow64\cmd.exe' /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f' (with hidden window)
- '%WINDIR%\syswow64\cmd.exe' /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%APPDATA%\svchost.exe" /t REG_SZ /d "%APPDATA%\svchost.e...' (with hidden window)
- '%WINDIR%\syswow64\cmd.exe' /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%APPDATA%\t.exe" /t REG_SZ /d "%APPDATA%\t.exe:*:Enabled...' (with hidden window)
- '%WINDIR%\syswow64\cmd.exe' /c ""<Current directory>\DNS.bat" "' (with hidden window)
Executes the following
- '%WINDIR%\microsoft.net\framework\v2.0.50727\csc.exe' /noconfig /fullpaths @"%TEMP%\zyptff_s.cmdline"
- '%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RESF475.tmp" "%TEMP%\CSCF464.tmp"
- '%WINDIR%\syswow64\cmd.exe' /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
- '%WINDIR%\syswow64\cmd.exe' /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%APPDATA%\svchost.exe" /t REG_SZ /d "%APPDATA%\svchost.e...
- '%WINDIR%\syswow64\cmd.exe' /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%APPDATA%\t.exe" /t REG_SZ /d "%APPDATA%\t.exe:*:Enabled...
- '%WINDIR%\syswow64\reg.exe' ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
- '%WINDIR%\syswow64\reg.exe' ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%APPDATA%\svchost.exe" /t REG_SZ /d "%APPDATA%\svchost.exe:*:En...
- '%WINDIR%\syswow64\reg.exe' ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%APPDATA%\t.exe" /t REG_SZ /d "%APPDATA%\t.exe:*:Enabled:Window...
- '%WINDIR%\syswow64\cmd.exe' /c ""<Current directory>\DNS.bat" "
- '%WINDIR%\syswow64\ipconfig.exe' /flushdnsipconfig/releaseipconfig/renew
- '%WINDIR%\microsoft.net\framework\v2.0.50727\dw20.exe' -x -s 680
