Technical Information
To ensure autorun and distribution
Modifies the following registry keys
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '<File name>.exe' = '%APPDATA%\<File name>.exe'
Creates the following files on removable media
- <Drive name for removable media>:\lshss.exe
- <Drive name for removable media>:\autorun.ini
Malicious functions
To bypass firewall, removes or modifies the following registry keys
- [<HKLM>\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%APPDATA%\build.exe' = '%APPDATA%\build.exe:*:Enabled:Windows Mess...
- [<HKLM>\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%APPDATA%\lshss.exe' = '%APPDATA%\lshss.exe:*:Enabled:Windows Mess...
- [<HKLM>\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DoNotAllowExceptions' = '00000000'
Injects code into
the following user processes:
- lshss.exe
Modifies file system
Creates the following files
- %APPDATA%\lshss.exe
- %TEMP%\x943cwz1.0.cs
- %TEMP%\x943cwz1.cmdline
- %TEMP%\x943cwz1.out
- %TEMP%\csc5342.tmp
- %TEMP%\res5343.tmp
- %TEMP%\x943cwz1.dll
- %APPDATA%\build.exe
- %APPDATA%\<File name>.exe
- %APPDATA%\data.dat
Sets the 'hidden' attribute to the following files
- <Drive name for removable media>:\lshss.exe
- <Drive name for removable media>:\autorun.ini
Deletes the following files
- %TEMP%\res5343.tmp
- %TEMP%\csc5342.tmp
- %TEMP%\x943cwz1.dll
- %TEMP%\x943cwz1.0.cs
- %TEMP%\x943cwz1.out
- %TEMP%\x943cwz1.cmdline
Network activity
UDP
- DNS ASK in####uskrew.info
Miscellaneous
Creates and executes the following
- '%APPDATA%\lshss.exe'
- '%WINDIR%\microsoft.net\framework\v2.0.50727\csc.exe' /noconfig /fullpaths @"%TEMP%\x943cwz1.cmdline"' (with hidden window)
- '%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RES5343.tmp" "%TEMP%\CSC5342.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%\lshss.exe" /t REG_SZ /d "%APPDATA%\lshss.exe:*...' (with hidden window)
- '%WINDIR%\syswow64\cmd.exe' /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%APPDATA%\build.exe" /t REG_SZ /d "%APPDATA%\build.exe:*...' (with hidden window)
Executes the following
- '%WINDIR%\microsoft.net\framework\v2.0.50727\csc.exe' /noconfig /fullpaths @"%TEMP%\x943cwz1.cmdline"
- '%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RES5343.tmp" "%TEMP%\CSC5342.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%\lshss.exe" /t REG_SZ /d "%APPDATA%\lshss.exe:*...
- '%WINDIR%\syswow64\cmd.exe' /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%APPDATA%\build.exe" /t REG_SZ /d "%APPDATA%\build.exe:*...
- '%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%\build.exe" /t REG_SZ /d "%APPDATA%\build.exe:*:Enable...
- '%WINDIR%\syswow64\reg.exe' ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%APPDATA%\lshss.exe" /t REG_SZ /d "%APPDATA%\lshss.exe:*:Enable...
