Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe %ALLUSERSPROFILE%\Start Menu\Programs\svchost\svchost.exe'
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '<Virus name>.exe' = '%ALLUSERSPROFILE%\Start Menu\Programs\svchost\svchost.exe'
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe %HOMEPATH%\svchost\svchost.exe'
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '<Virus name>.exe' = '%HOMEPATH%\svchost\svchost.exe'
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe %CommonProgramFiles%\svchost\svchost.exe'
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '<Virus name>.exe' = '%CommonProgramFiles%\svchost\svchost.exe'
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe %ALLUSERSPROFILE%\Application Data\svchost\svchost.exe'
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '<Virus name>.exe' = '%ALLUSERSPROFILE%\Application Data\svchost\svchost.exe'
Malicious functions:
To complicate detection of its presence in the operating system,
blocks execution of the following system utilities:
- Registry Editor (RegEdit)
Creates and executes the following:
- %CommonProgramFiles%\svchost\svchost.exe
Executes the following:
- <SYSTEM32>\net1.exe Stop SharedAccess
- <SYSTEM32>\net1.exe stop "Security Center"
- <SYSTEM32>\netsh.exe firewall set opmode mode=disable
- <SYSTEM32>\net.exe Stop SharedAccess
- <SYSTEM32>\net.exe stop "Security Center"
Modifies settings of Windows Internet Explorer:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Attachments] 'SaveZoneInformation' = '00000001'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Associations] 'LowRiskFileTypes' = '.exe;.bat;.com;.cmd;.reg;.vbs;.inf;.msi;.htm;.html;.js;'
- [<HKCU>\Software\Microsoft\Internet Explorer\Download] 'CheckExeSignatures' = 'no'
- [<HKCU>\Software\Microsoft\Internet Explorer\Download] 'RunInvalidSignatures' = '00000001'
Modifies file system :
Creates the following files:
- %HOMEPATH%\svchost\svchost.exe
- %ALLUSERSPROFILE%\Start Menu\Programs\svchost\svchost.exe
- %TEMP%\eoinvdd
- %TEMP%\aut2.tmp
- %TEMP%\cwcbekx
- %TEMP%\aut1.tmp
- %ALLUSERSPROFILE%\Application Data\svchost\svchost.exe
- %CommonProgramFiles%\svchost\svchost.exe
Sets the 'hidden' attribute to the following files:
- %ALLUSERSPROFILE%\Start Menu\Programs\svchost\svchost.exe
- %HOMEPATH%\svchost\svchost.exe
- %CommonProgramFiles%\svchost\svchost.exe
- %ALLUSERSPROFILE%\Application Data\svchost\svchost.exe
Deletes the following files:
- %TEMP%\aut2.tmp
- %TEMP%\eoinvdd
- %TEMP%\aut1.tmp
- %TEMP%\cwcbekx
