per.exe is a mass-mailing worm W32.Zotob.C@mm. per.exe opens a back door on TCP port 445. per.exe spreads by using the vulnerability in Microsoft Windows Plug and Play Service (Microsoft Security Bulletin MS05-039). Related files: %System%\per.exe Adds the value: "WINDOWS SYSTEM" = "per.exe" to the Windows startup registry keys. More info: http://securityresponse.symantec.com/avc... Removal: Kill per.exe process and remove per.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.
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