1. Computing
Tommy Armendariz

Keep Your PC Safe from Sirefef (ZeroAccess)

By January 24, 2013

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Sirefef Malware

The Sirefef malware (aka ZeroAccess) is a severe, multi-component family of malware. Sirefef can be implemented in a variety of different ways, such as a rootkit, virus, or a Trojan horse.

To help protect your computer from the Sirefef malware, perform the following steps:

  1. Keep Current with Operating System Updates -- Important system updates provide significant benefits such as improved security. Not keeping up with operating system updates will make your PC vulnerable to malware threats such as Sirefef. Ensure you use the Automatic Updates feature in Windows and have your computer automatically download Microsoft security updates.
  2. Use an Antivirus Software -- Even though Sirefef can disable antivirus applications once it has been installed on your machine, having an antivirus application installed prior to becoming infected with the malware can help prevent infection. You must update the antivirus application with the latest signature files.  Out-of-date signature files will be render the antivirus application useless not only against Sirefef, but against other malware such as the FBI virus.
  3. Be Cautious of the Websites You Visit -- Keep away from unknown sites and don't click on links within emails unless you're absolutely sure it's safe to do so.
  4. Don't Download and Install Pirated Software -- Sirefef is often distributed by exploits that promote software piracy. Pirated software can introduce other threats, such as the Suspicious.Emit malware.

Sirefef can cause significant damage to your computer in a variety of ways. By performing these mitigation steps, you can help prevent this malicious attack from infecting your computer.

Image İRyan Whitwam

February 4, 2013 at 3:52 pm
(1) Ed says:

My Microsoft Security Essentials notifed me last week that my computer ws infected with the Trojan Sirefef. Hopefully it removed it before damage was done–BUT I now notice that I cannot access my WIndows Firewall!

Could it have been disconnected by sirefef? And how can I recover it?

February 4, 2013 at 6:04 pm
(2) antivirus says:

Hi Ed,

Thank you for sharing your experience with us. Yes, it is possible that Sirefef disabled your firewall. Have you tried rebooting your PC in safemode and running your antivirus? I am working on a separate article with step-by-step instructions on removing Sirefef from infected computers. I will post a link to the article here once I have published it.

February 11, 2013 at 3:31 pm
(3) Virgina says:

Is there a really reliable free antivirus? Thanks for your comments

February 12, 2013 at 4:28 am
(4) stu says:

try avast

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