Manual Removal Guide for Win32.Sirefef

The following instructions have been created to help you to get rid of "Win32.Sirefef" manually.
Use this guide at your own risk; software should usually be better suited to remove malware, since it is able to look deeper.

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Threat Details:

Categories:

• trojan
• rootkit

Description:

Win32.Sirefef gets promoted via spam. It directs the user to a website faking youtube with porn videos. To watch the videos, the user is required to download and install Adobe flash. The linked download is a fake and installs the Trojan horse which will do further harm to the computer. Other versions of Win32.Sirefef also get promoted as other video codecs/players or updates and can also install rootkits and other Trojan horses.

Removal Instructions:

Autorun:

Please use Spybot-S&D, RunAlyzer or msconfig.exe to remove the following autorun entries.

• Entries named "Windows Init" and pointing to "?<$APPDATA>\*\svcnost.exe?".

Important: There are more autorun entries that cannot be safely described in simple words. Please use Spybot-S&D to remove them.

Files:

Please use Windows Explorer or another file manager of your choice to locate and delete these files.

• The file at "<$APPDATA>\ntuser.dat".
• The file at "<$PROFILE>\notes.exe".
• The file at "<$SYSDIR>\T0O5Y7Pu.com_".
• The file at "<$SYSDIR>\T0O5Y7Pu.com".
• The file at "<$WINDIR>\$NtUninstallKB45745$\1362224000\@".
• The file at "<$WINDIR>\$NtUninstallKB45745$\1362224000\bckfg.tmp".
• The file at "<$WINDIR>\$NtUninstallKB45745$\1362224000\cfg.ini".
• The file at "<$WINDIR>\$NtUninstallKB45745$\1362224000\Desktop.ini".
• The file at "<$WINDIR>\$NtUninstallKB45745$\1362224000\kwrd.dll".
• The file at "<$WINDIR>\$NtUninstallKB45745$\1362224000\L\rrrviooe".
• The file at "<$WINDIR>\$NtUninstallKB45745$\1362224000\U\00000001.@".
• The file at "<$WINDIR>\$NtUninstallKB45745$\1362224000\U\00000002.@".
• The file at "<$WINDIR>\$NtUninstallKB45745$\1362224000\U\00000004.@".
• The file at "<$WINDIR>\$NtUninstallKB45745$\1362224000\U\80000000.@".
• The file at "<$WINDIR>\$NtUninstallKB45745$\1362224000\U\80000004.@".
• The file at "<$WINDIR>\$NtUninstallKB45745$\1362224000\U\80000032.@".

Make sure you set your file manager to display hidden and system files. If Win32.Sirefef uses rootkit technologies, use our RootAlyzer or our Total Commander anti-rootkit plugins.
You will have to use a global search for files without a name specified. Be extra careful, because just the name might not be enough to identify files!

Important: There are more files that cannot be safely described in simple words. Please use Spybot-S&D to remove them.

Folders:

Please use Windows Explorer or another file manager of your choice to locate and delete these folders.

• The directory at "<$APPDATA>\<$ENV(Sirefef_path)>".
• The directory at "<$WINDIR>\$NtUninstallKB45745$\1362224000\L".
• The directory at "<$WINDIR>\$NtUninstallKB45745$\1362224000\U".
• The directory at "<$WINDIR>\$NtUninstallKB45745$\1362224000".
• The directory at "<$WINDIR>\$NtUninstallKB45745$\193997191".
• The directory at "<$WINDIR>\$NtUninstallKB45745$".
• The directory at "<$WINDIR>\Temp\<$REGMATCH1>".

Make sure you set your file manager to display hidden and system files. If Win32.Sirefef uses rootkit technologies, use our RootAlyzer or our Total Commander anti-rootkit plugins.
You will have to use a global search for files without a name specified. Be extra careful, because just the name might not be enough to identify folders!

Registry:

You can use regedit.exe (included in Windows) to locate and delete these registry entries.

• Delete the registry value "<$APPDATA>\<$ENV(Sirefef_path)>\svcnost.exe" at "HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\".
• Delete the registry value "<$APPDATA>\<$ENV(Sirefef_path)>\svcnost.exe" at "HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\".
• Delete the registry value "<$APPDATA>\<$ENV(Sirefef_path)>\svcnost.exe" at "HKEY_LOCAL_MACHINE\SYSTEM\ControlSet003\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\".

If Win32.Sirefef uses rootkit technologies, use our RegAlyzer, RootAlyzer or our Total Commander anti-rootkit plugins.

Final Words:

If neither Spybot-S&D nor self help did resolve the issue or you would prefer one on one help,

1. Please read these instructions before requesting assistance,
2. Then start your own thread in the Malware Removal Forum where a volunteer analyst will advise you as soon as available.

There are more files or system entries belonging to this product that <$SPYBOTSD> can remove, but that cannot be easily described in text. Please use <$SPYBOTSD> to make sure <$PRODUCTNAME> gets completely removed.