AntivirusIS is a Rogue Antivirus program. Once Antivirus IS is installed, it runs a scan, the program reports false scan alerts. The user is then prompted to pay for a full license of the software in order to remove the threats. The program is also a browser hijacker that changes browser settings. The program will prevent a user from accessing other programs on the computer such as; task manager, registry editor and even system restore.

If you are unable to launch Malwarebytes Anti-Malware, simply rename the installer to iexplore.exe.

Type: Misleading Application
Name: Antivirus IS
Website: (Site rated poor on
Risk Impact: Medium
Systems Affected: Windows 2000, Windows Server 2003, Windows Vista, Windows XP and Windows 7
Behavior: AntivirusIS is a misleading application that may give exaggerated reports of threats on the computer.

AntivirusIS Removal

AntivirusIS Manual Removal Instructions

AntivirusIS registry values:

Delete registry values:
HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Download “RunInvalidSignatures” = “1”
HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\PhishingFilter “Enabled” = “0”
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings “ProxyOverride” = “”
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings “ProxyServer” = “http=”
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Associations “LowRiskFileTypes” = “.exe”
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Attachments “SaveZoneInformation” = “1”
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run “[random]”
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run “[random]”
HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Download “CheckExeSignatures” = “no”
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings “ProxyEnable” =”1″

Other malicious files:
C:\Documents and Settings\[User Name]\Local Settings\Application Data\SET OF RANDOM CHARACTERS]\
C:\Documents and Settings\[User Name]\Local Settings\Application Data\SET OF RANDOM CHARACTERS]\SET OF RANDOM CHARACTERS].exe
C:\Users\User\AppData\Local\[SET OF RANDOM CHARACTERS]

Automatic Removal

Download and install SUPERAntiSpyware and Malwarebytes Anti-Malware. Both security programs come with free versions.

I recommend that you run multiple passes of SUPERAntiSpyware and Malwarebytes Anti-Malware.

It’s important that you keep your security programs up to date. I highly recommend downloading the WOT (Web of Trust) add-on for IE and/or Firefox. The WOT add-on warns you about risky sites before you click.

This rogue software is from the same family as Security Suite and Antivirus Soft.

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