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Security Updates.

Mar 12, 2010

Watch out for fake virus alerts

From Microsoft Security website:

Rogue security software, also known as "scareware," is software that appears to be beneficial from a security perspective but provides limited or no security, generates erroneous or misleading alerts, or attempts to lure users into participating in fraudulent transactions.

How does rogue security software get on my computer?

Rogue security software designers create legitimate looking pop-up windows that advertise security update software. These windows might appear on your screen while you surf the Web.

The "updates" or "alerts" in the pop-up windows call for you to take some sort of action, such as clicking to install the software, accept recommended updates, or remove unwanted viruses or spyware. When you click, the rogue security software downloads to your computer.

Rogue security software might also appear in the list of search results when you are searching for trustworthy antispyware software, so it is important to protect your computer.

What does rogue security software do?

Rogue security software might report a virus, even though your computer is actually clean. The software might also fail to report viruses when your computer is infected. Inversely, sometimes, when you download rogue security software, it will install a virus or other malicious software on your computer so that the software has something to detect.

Some rogue security software might also:

-Lure you into a fraudulent transaction (for example, upgrading to a non-existent paid version of a program).
-Use social engineering to steal your personal information.
-Install malware that can go undetected as it steals your data.
-Launch pop-up windows with false or misleading alerts.
-Slow your computer or corrupt files.
-Disable Windows updates or disable updates to legitimate antivirus software.
-Prevent you from visiting antivirus vendor Web sites.

Rogue security software might also attempt to spoof the Microsoft security update process. Here's an example of rogue security software that's disguised as a Microsoft alert but that doesn't come from Microsoft.

For more information about this threat, including analysis, prevention and recovery, see the Trojan:Win32/Antivirusxp entry in the Microsoft Malware Protection Center encyclopedia.

Another common rogue security program is FakeSecSen.

For more information about this threat, including analysis, prevention and recovery, see the Program:Win32/FakeSecSen entry in the Microsoft Malware Protection Center encyclopedia.

To help protect yourself from rogue security software:

-Install a firewall and keep it turned on.
-Use automatic updating to keep your operating system and software up to date.
-Install antivirus and antispyware software such as Microsoft Security Essentials and keep it updated. For links to other antivirus programs that work with Microsoft, see Microsoft Help and Support List of Antivirus Vendors.
-If your antivirus software does not include antispyware software, you should install a separate antispyware program such as Windows Defender and keep it updated. (Windows Defender is available as a free download for Windows XP and is included in Windows Vista.)
-Use caution when you click links in e-mail or on social networking Web sites.
-Use a standard user account instead of an administrator account.
-Familiarize yourself with common phishing scams.

If you think you might have rogue security software on your computer:

Scan your computer. Use your antivirus software or do a free scan with Windows Live safety scanner. The safety scanner checks for and removes viruses, eliminates junk on your hard drive, and improves your PC's performance.

Check your accounts. If you think you might have entered sensitive information, such as credit card numbers or passwords into a pop-up window or at a rogue security software site, you should monitor your associated accounts. For additional information, see What to do if you're a victim of fraud.

Call PC Safety. Microsoft provides free virus and spyware removal support to Windows customers who think they have an infected computer or have other PC Security questions.

Customers should call 1-866-PC Safety for phone support which is available 24 hours a day 7 days a week.

Customers can also visit http://safety.live.com for free online virus and spyware removal.

If you suspect that your computer is infected with rogue security software that is currently not detected with Microsoft security solutions, you can submit samples using the Microsoft Malware Protection Center submission form. For help with isolating undetected samples, call PC Safety.