Trojan.Mebroot is a dealdy Trojan that can modify and infect the Master Boot Record (MBR) of the hard-disk. Antivirus will hardly detect the trojan because it uses rootkit techniques to hide itself. 

Other Alias:
StealthMBR
Stealth MBR rootkit

Threat Level: Low

Systems Affected: Windows - All

More: Trojan.Mebroot on SSR