Trojan:Win64/Sirefef.AA
Posted: July 23, 2012
Threat Metric
The following fields listed on the Threat Meter containing a specific value, are explained in detail below:
Threat Level: The threat level scale goes from 1 to 10 where 10 is the highest level of severity and 1 is the lowest level of severity. Each specific level is relative to the threat's consistent assessed behaviors collected from SpyHunter's risk assessment model.
Detection Count: The collective number of confirmed and suspected cases of a particular malware threat. The detection count is calculated from infected PCs retrieved from diagnostic and scan log reports generated by SpyHunter.
Volume Count: Similar to the detection count, the Volume Count is specifically based on the number of confirmed and suspected threats infecting systems on a daily basis. High volume counts usually represent a popular threat but may or may not have infected a large number of systems. High detection count threats could lay dormant and have a low volume count. Criteria for Volume Count is relative to a daily detection count.
Trend Path: The Trend Path, utilizing an up arrow, down arrow or equal symbol, represents the level of recent movement of a particular threat. Up arrows represent an increase, down arrows represent a decline and the equal symbol represent no change to a threat's recent movement.
% Impact (Last 7 Days): This demonstrates a 7-day period change in the frequency of a malware threat infecting PCs. The percentage impact correlates directly to the current Trend Path to determine a rise or decline in the percentage.
| Ranking: | 2,479 |
|---|---|
| Threat Level: | 9/10 |
| Infected PCs: | 95,361 |
| First Seen: | July 23, 2012 |
|---|---|
| Last Seen: | October 16, 2023 |
| OS(es) Affected: | Windows |
Trojan:Win64/Sirefef.AA is a component of a Sirefef (also known as Max++ or ZeroAccess) rootkit infection, a PC threat that's noted for flexible payloads and a multiple-component structure that's often used to hijack your web browser or install rogue security programs. All components of a Sirefef infection should be considered potentially high-level PC threats, and Trojan:Win64/Sirefef.AA isn't an exception to this general rule. Besides redirecting your online searches to harmful websites, Trojan:Win64/Sirefef.AA, by itself, may also turn your computer off at random intervals, forcing you to reboot manually. Other symptoms of infection by Trojan:Win64/Sirefef.AA and related PC threats may or may not be evident, and SpywareRemove.com malware research team recommends that you use powerful anti-malware products to remove Trojan:Win64/Sirefef.AA and other rootkit components.
Trojan:Win64/Sirefef.AA: a Very Special Browser Hijacker Just for Your OS
Trojan:Win64/Sirefef.AA, unlike many other Sirefef-based PC threats, is specific to 64-bit versions of Windows. 32-bit Windows OSes and non-Windows OSes can be considered safe from Trojan:Win64/Sirefef.AA, although the same doesn't apply to all variants of Sirefef or similar rootkits. Because Trojan:Win64/Sirefef.AA and other rootkit-based PC threats (such as a href="/removetrojsirefefkby.html" title="RemoveTroj_Sirefef.kby">Troj_Sirefef.kby, Win32/Sirefef.FY, Trojan.Sirefef.Ga, Win32:Sirefef-PL, PTCH_SIREFEF.L, Trojan win32:sirefef-sm and Trojan.Sirefef.BV) try to conceal themselves from visibility by infecting operating system files, you should use anti-malware programs to detect and remove Trojan:Win64/Sirefef.AA and its relatives non-hazardously.
SpywareRemove.com malware analysts have noted that Trojan:Win64/Sirefef.AA has two major functions, both of which can be detected manually:
- Trojan:Win64/Sirefef.AA can redirect your web browser's online searches to irrelevant, unwanted or even malicious websites. These redirects trigger off of popular search engines, such as Google, Bing, Ask.com, Search.Icq.com and Yahoo. At the time of this writing, online searches that use other types of search engines should be unaffected by Trojan:Win64/Sirefef.AA redirects.
- Trojan:Win64/Sirefef.AA may also turn off your PC under arbitrary circumstances (such as when Trojan:Win64/Sirefef.AA or a related PC threat detects usage of anti-malware scanners). However, booting your PC manually will the power state back to normal – until the next time Trojan:Win64/Sirefef.AA launches this attack.
Extra Reasons for You to Boot Trojan:Win64/Sirefef.AA's Browser-Hijacking Posterior from Your Hard Drive
Trojan:Win64/Sirefef.AA's attacks may be limited to the issues noted above, but SpywareRemove.com malware research team also adds that Trojan:Win64/Sirefef.AA is unlikely to be the only PC threat on any Trojan:Win64/Sirefef.AA-infected computer. Sirefef-based PC threats like Trojan:Win64/Sirefef.AA are designed to work in groups and can be used to hide each other, download other malicious files or launch attacks that can include:
- Disabling Windows safety features, such as Safe Mode, protection against files with improper signatures or Internet Explorer's security zones.
- Creating backdoor vulnerabilities that can allow criminals to control your computer for purposes such as stealing information or installing harmful software without your permission.
- Injecting malicious files into the memory processes of unrelated programs.
- Infecting components of your operating system.
As an advanced PC threat, Trojan:Win64/Sirefef.AA should be deleted by anti-malware programs that have proven themselves adequate against rootkits and similarly-sophisticated types of hostile software.
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