Home Malware Programs Trojans TR/Sirefef.A.77

TR/Sirefef.A.77

Posted: April 9, 2013

Threat Metric

Threat Level: 9/10
Infected PCs: 16
First Seen: April 9, 2013
Last Seen: February 18, 2022
OS(es) Affected: Windows

TR/Sirefef.A.77 is a Trojan that is not able to propagate on its own. TR/Sirefef.A.77 is either downloaded by the computer user or is downloaded by another PC threat. The program, which drops another program is usually referred to as a vector. In this case, the vector is extremely dangerous rootkit of Zero Access family. TR/Sirefef.A.77 is virtually rather added to the hard drive than installed into the operating system. TR/Sirefef.A.77 stays beyond operating system so that a security tool functioning within operating system only cannot see the malware threat. TR/Sirefef.A.77 is able to recur even after removal. Once removed, TR/Sirefef.A.77 is restored by the relevant malware threat disguised in the boot sector.

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