Published Jun 30, 2011 | Updated Sep 15, 2017

Trojan:Win32/Tracur

Severe |Detected with Windows Defender Antivirus

Aliases: Win32/Kryptik (ESET) Sefnit (McAfee) W32/Vundo (Norman) Win32.Genome (Kaspersky) Trojan.Alyak (Rising AV) Trojan.Click (Dr.Web) TROJ_TRACUR (Trend Micro)

Summary

Windows Defender detects and removes this threat.

This threat is a component of , which is a family of that redirect web search queries to malicious , download and run and other files, including other malware, and let backdoor access and remote control.Win32/TracurURLstrojans

The purpose of this redirection may be to earn revenue for the malware's authors via online advertisement fraud. The trojans hijack search result links from the following search engines, and redirect you to a different result than where you were intending to go:

  • Alltheweb
  • Altavista
  • AOL
  • Ask
  • Bing
  • Gigablast
  • Google
  • Hotbot
  • Lycos
  • Netscape
  • Snap
  • Yahoo
  • Youtube

The following free software detects and removes this threat:Microsoft

Even if we've already detected and removed this particular threat, running a full scan might find other malware that is hiding on your .PC

You can also visit the for more help.Microsoft virus and malware community

You may need to remove add-ons from your browser. You can find out how to do this in the following articles:

This threat might add itself to your exception list. This means it can go online without being blocked. To remove it from the exception list, do the following:Windows Firewall

For Windows 8 :

For Windows 7:

For :Windows Vista

For :Windows XP

Remove browser add-ons
Remove program exceptions in the firewall
  1. Open by swiping in from the right edge of the screen, tapping (or if you're using a mouse, pointing to the upper-right corner of the screen, moving the mouse pointer down, and then clicking ), entering in the search box, tapping or clicking , and then tapping or clicking .Windows FirewallSearchSearchfirewallSettingsWindows Firewall
  2. In the left pane, tap or click .let an app or feature through Windows Firewall
  3. Tap or click . You might be asked for an admin password or to confirm your choice.Change settings
  4. Select the check box next to the app you want to let, select the network types you want to let communication on, and then click .OK
  1. Click , select , then .StartControl PanelSystem and Security
  2. Select .Windows Firewall
  3. On the menu on the left, select . If you're prompted, type the password or provide confirmation.let a program through Windows Firewall
  4. Click . If you're prompted, type the password or provide confirmation.Change Settings
  5. Select <program name> from the list of leted programs and features. Click .Remove
  6. Click .OK
  1. Click , select , then .StartControl PanelSecurity Center
  2. On the menu on the left, select .Windows Firewall
  3. On the menu on the left, select . If you are prompted, type the password or provide confirmation.let a program through Windows Firewall
  4. Select <program name> from the list of leted programs and features. Click .Delete
  5. Click .OK
  1. Use an administrator account to log on.
  2. Click , select , type , and then click .StartRunOKwscui.cpl
  3. In Windows Security Center, click .Windows Firewall
  4. On the tab, click <program name> and then click .ExceptionsDelete
  5. Click .OK
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