Trojan:Win32/Sirefef.AC is a malicious .exe file that’s used as one part of a multi-component ZeroAccess Rootkit (AKA Sirefef Trojan) infection. Because Trojan:Win32/Sirefef.AC is never installed by itself and will always serve as a portent of the presence of other PC threats, what is recommended by SpywareRemove.com malware researchers is to run a scan of your entire PC thoroughly to detect and remove both Trojan:Win32/Sirefef.AC and any related malicious software that’s been installed without your permission. Trojan:Win32/Sirefef.AC doesn’t display visible symptoms of its attacks and, like other rootkit-based PC threats, may restore itself from incomplete deletion or a System Restore rollback. However, you may be able to detect Trojan:Win32/Sirefef.AC indirectly by noting some of the symptoms of a ZeroAccess Rootkit’s payload, such as browser redirects and unusual search engine results. Despite the low visibility of its presence and hostile behavior, Trojan:Win32/Sirefef.AC should always be considered a threat to your machine that should be removed immediately, like all rootkits.
Trojan:Win32/Sirefef.AC: a Piece of the Puzzle That Confounds Your Online Searches
By itself, Trojan:Win32/Sirefef.AC doesn’t have significant symptoms, and its 5.5k file size causes Trojan:Win32/Sirefef.AC to be easy to overlook unless you’re specifically searching for Trojan:Win32/Sirefef.AC on your PC. SpywareRemove.com malware researchers recommend that you use appropriate security programs to detect Trojan:Win32/Sirefef.AC, which will always be installed with other PC threats from the Sirefef family, such as Win32/Sirefef.AH, TrojanDropper:Win32/Sirefef, Trojan:Win32/Sirefef.S, Trojan:Win32/Sirefef.J, Trojan:Win64/Sirefef.K or Virus:Win32/Sirefef.N.Trojan.Zeroaccess!inf.
Symptoms of an overall Sirefef infection can be observed in the form of browser hijacks, especially redirect attacks that reroute your searches through questionable search engine websites as a form of click fraud. Since these attacks are accomplished by way of Trojan:Win32/Sirefef.AC and other Sirefef components, as well as various system setting changes, SpywareRemove.com malware researchers warn against any attempt to stop them simply by changing your browser or browser settings.
Why Trojan:Win32/Sirefef.AC, Like a Bad Memory, Keeps Coming Back
If Trojan:Win32/Sirefef.AC is deleted incompletely or you fail to remove all related PC threats along with Trojan:Win32/Sirefef.AC, Trojan:Win32/Sirefef.AC will most likely be reinstalled the next time your PC reboots. SpywareRemove.com malware researchers also note that this especially includes attempts to delete Trojan:Win32/Sirefef.AC with Windows functions such as System Restore, which are ineffective at removing all components of most rootkit infections like ZeroAccess. However, as a silver lining, Trojan:Win32/Sirefef.AC and its kin are Windows-specific, and as such, are unable to attack other types of operating systems.
Trojan:Win32/Sirefef.AC was identified by many PC security companies in early February of 2012. To insure that your security software can find and remove Trojan:Win32/Sirefef.AC completely, SpywareRemove.com malware experts reinforce that it is crucial to have your software updated to at least that point (and, preferentially, to the latest available threat definitions patch). You may also need to take further steps to disable Trojan:Win32/Sirefef.AC and associated malicious software before Trojan:Win32/Sirefef.AC can be fully deleted.
Trojan:Win32/Sirefef.AC Automatic Detection Tool (Recommended)
Is your PC infected with Trojan:Win32/Sirefef.AC? To safely & quickly detect Trojan:Win32/Sirefef.AC, we highly recommend you run the malware scanner listed below.
Download SpyHunter's* Malware Scanner to detect Trojan:Win32/Sirefef.AC What happens if Trojan:Win32/Sirefef.AC does not let you open SpyHunter or blocks the Internet?
Posted: April 10, 2012 | By SpywareRemove
Threat Level: 9/10
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Detection Count: 98