Kaspersky Lab has developed the TDSSKiller utility that that detects and
removes both, known (TDSS, Sinowal, Whistler, Phanta, Trup, Stoned) and
unknown rootkits. A rootkit is a program or a program kit that hides the
presence of malware in the system. A rootkit for Windows systems is a program
that penetrates into the system and intercepts the system functions (Windows
API). (in System Utilities)