TDL4 rootkit around since 2008, recently its authors modified and made TDL4/TDSS rootkit version  as “indestructible botnet” if you’re redirected to malicious sites and affiliate links shown in place of search results then your system may be infected with TDL4, most sophisticated rootkit ever. Security vendors BitDefender and Kaspersky released free TDL4 removal tools for Windows users.

BitDefender Removal tool

TDL4  can infect both 32-bit and 64-bit Windows version, makes it more dangerous. TDL4 uses encrypted custom algorithms to stays deeply hidden from detection from most antivirus solutions. This Bootkit infects Master Boot Record (MBR) which allows to load its code before Windows startup. This rootkit spreads through Porn and illegal file sharing sites.

TDSSKiller

Both BitDefender and Kaspersky offering TDL4/TDSS removal tools for 32-bit and 64-bit versions of Windows.

Download TDL4/TDSS Removal tools