Posted: December 12, 2011
Threat Metric
Threat Level: 10/10
Infected PCs 45

Mal/ZAccess-D Description

Mal/ZAccess-D is a component of a ZeroAccess rootkit that alters your Windows Registry, creates serious security holes and may cause other forms of harm to your PC (such as browser redirects or poor system performance). Other ZeroAccess rootkit components such as Mal/ZAccess-A and Backdoor.Win64.ZAccess.o may also be involved in a Mal/ZAccess-D infection, and malware researchers recommend that you remove Mal/ZAccess-D by scanning your entire PC so that related PC threats are also detected and deleted. Although Mal/ZAccess-D, like other rootkit-based PC threats, may show few signs of its presence, Mal/ZAccess-D should be considered a top-level security risk and combated with appropriate haste.

Mal/ZAccess-D: A Brand-New Assassin Against Your Computer's Safety

Although the rootkits that Mal/ZAccess-D is based on have been around for some time, Mal/ZAccess-D itself has only been identified as a specific form of PC threat since November of 2011. Anti-malware products with threat databases that are earlier than this may be unable to detect or remove Mal/ZAccess-D, although, in most cases, using the default update function should be enough to alleviate this issue. malware researchers stress the importance of using anti-malware programs to detect Mal/ZAccess-D due to its rootkit-level concealment functions that allow Mal/ZAccess-D run as malicious code that's injected into unrelated files (such as baseline Windows files).

Common behavior by Mal/ZAccess-D include:

  • Altering the Windows Registry to cause errors in the Winsock interface that redirect your web browser to hostile sites, block safe websites or even deny you Internet connectivity wholesale.
  • Infecting a normal system file so that Mal/ZAccess-D can launch itself automatically and constantly use system resources for malicious activities.

Because Mal/ZAccess-D can use browser hijacks to expose you to sites that may attack your PC with drive-by-download scripts and similar forms of hostility, malware researchers recommend that you pay close attention to your web-browsing behavior while you're using any computer that's infected by Mal/ZAccess-D.

Restoring Your Non-Malicious Access to the Web

Although removing Mal/ZAccess-D by manual methods can be considered extremely-difficult for all but PC security experts, removing Mal/ZAccess-D with appropriate anti-malware software is a safe and straightforward task. A complete scan of your PC is the recommended means of deleting Mal/ZAccess-D due to the high chance that Mal/ZAccess-D will be accompanied by other components of a ZeroAccess rootkit infection. If your anti-malware software fails to detect Mal/ZAccess-D even though you're experiencing its symptoms, you may want to run your scan in Safe Mode or launch Windows from an external source to stop Mal/ZAccess-D from launching and interfering with its own removal.

Mal/ZAccess-D can also be detected by other names that are dependent on the type of anti-malware program that catches Mal/ZAccess-D. malware researchers have found that Mal/ZAccess-D's current aliases include Trojan-Dropper.Win32.Injector.ugv, Trojan.Win32.Menti.irro and Trojan.Win32.Pakes.qwe.

Use SpyHunter to Detect and Remove PC Threats

If you are concerned that malware or PC threats similar to Mal/ZAccess-D may have infected your computer, we recommend you start an in-depth system scan with SpyHunter. SpyHunter is an advanced malware protection and remediation application that offers subscribers a comprehensive method for protecting PCs from malware, in addition to providing one-on-one technical support service.

Download SpyHunter's Malware Scanner

Note: SpyHunter's free version is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter's malware tool to remove the malware threats. Learn more on SpyHunter. If you would like to uninstall SpyHunter for any reason, please follow these uninstall instructions. To learn more about our policies and practices, visit our EULA, Privacy Policy and Threat Assessment Criteria.

Why can't I open any program including SpyHunter? You may have a malware file running in memory that kills any programs that you try to launch on your PC. Tip: Download SpyHunter from a clean computer, copy it to a USB thumb drive, DVD or CD, then install it on the infected PC and run SpyHunter's malware scanner.

Technical Details

Registry Modifications

The following newly produced Registry Values are:

HKEY..\..\..\..{Subkeys}HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\System "EnableUIADesktopToggle"= 0HKEY_LOCAL_MACHINE\Software\Microsoft\WindowsNT\CurrentVersion\winlogon\Mal/ZAccess-DHKLM\~\services\sharedaccess\parameters\firewallpolicy\standardprofile\AuthorizedApplications\List "%windir%\\Network Diagnostic\\xpnetdiag.exe"=

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