aswMBR is a rootkit scanner from Avast Software that scans for MBR/VBR/SRV rootkits. It can detect TDL4/3(Alureon), ZAccess, MBRoot (Sinowal), Whistler, SST, Cidox, Pihar and other malware.The current version of aswMBR uses "Virtualization Technology" to improve detection of stealth malware. Please note that to use this feature your machine & CPU must support hardware virtualization.