Home Malware Programs Trojans Win32.ZAccess.m

Win32.ZAccess.m

Posted: September 4, 2012

Threat Metric

Threat Level: 9/10
Infected PCs: 9
First Seen: September 4, 2012
Last Seen: July 14, 2020
OS(es) Affected: Windows

Win32.ZAccess.m is an alert for Windows system files that have been infected by ZeroAccess (AKA Sirefef or Max++) rootkits and Trojans. These attacks target specific Windows files and insert code for ZeroAccess to launch automatically as part of your operating system's processes, and SpywareRemove.com malware experts haven't seen any cases of Win32.ZAccess.m or related PC threats infected benign nonsystem files. Win32.ZAccess.m usually is related to launching or protecting other parts of a multi-component ZeroAccess infection, which can, themselves, launch severe attacks such as inserting phishing attacks into bank web pages or monitoring keyboard input (keylogging). Since Win32.ZAccess.m infects vital system files and is just one of several PC threats in any one ZeroAccess infection, you should delete Win32.ZAccess.m with a top-of-the-line anti-malware program and scan the rest of your PC to uncover the rest of ZeroAccess's files.

Win32.ZAccess.m: the Innocuous Windows Component with a Lot Going On Behind the Scenes

Other ZeroAccess components (such as Trojan droppers that specialize in installing ZeroAccess rootkits) install Win32.ZAccess.m by inserting its code into services.exe, the Windows file that controls the startup and cessation of services. From that location, Win32.ZAccess.m is used to launch other ZeroAccess components, while the Trojan dropper usually deletes itself to avoid detection. Win32.ZAccess.m may also shut down services that Win32.ZAccess.m considers a threat to itself such as anti-virus scanners and other PC security tools.

Other PC threats related to ZeroAccess infections usually use similar methods to conceal themselves – for example, by having their code injected into a web browser's process. As a result, SpywareRemove.com malware researchers discourage attempts to delete Win32.ZAccess.m and other ZeroAccess-based infections without anti-malware products or, at least, assistance from PC security experts. Deleting the infected files will damage your OS and may cause Windows to be unable to boot until you repair it with its factory CD/DVD.

What Win32.ZAccess.m Gives a Helping Hand in Creating

Win32.ZAccess.m isn't designed for functions other than the ones described above. However, SpywareRemove.com malware analysts have found a whole host of other attacks in closely-related PC threats from the ZeroAccess family. Other components of ZeroAccess that are launched by Win32.ZAccess.m can result in attacks that include:

  • Changing your online search results to display advertisements or unrelated sites.
  • Disabling security features such as Internet Explorer's security zones.
  • Monitoring keyboard input, screen activity (via screenshots), browser activities and text form fields to steal personal information. Account passwords and user names are especially likely to be compromised by PC threats linked to Win32.ZAccess.m.

SpywareRemove.com malware researchers have found many aliases for Win32.ZAccess.m, which is a well-defined threat that many PC security companies have identified and defined in their threat databases. Win32.ZAccess.m's prominent aliases include ZeroAccess.ds.gen.c, Trojan.Zeroaccess!inf4, PTCH_ZACCESS.A and Virus:Win32/Sirefef.R.

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