Aliases: Win32/Kryptik (ESET) Sefnit (McAfee) W32/Vundo (Norman) Win32.Genome (Kaspersky) Trojan.Alyak (Rising AV) Trojan.Click (Dr.Web) TROJ_TRACUR (Trend Micro)
Windows Defender detects and removes this threat.
Win32/Tracur is a family of trojans that can redirect your web searches. They do this to earn revenue for the malware authors via online advertisement fraud. The trojans hijack search result links from the following search engines, and redirect you to a different webpage:
Win32/Tracur can also download and run files, including other malware, and give a hacker control of your PC.
These threats can be installed on your PC by other malware, or when you click on a suspicious link or email attachment.
The following free Microsoft software detects and removes this threat:
- Microsoft Security Essentials or, for Windows 8, Windows Defender
- Microsoft Safety Scanner
- Microsoft Windows Malicious Software Removal Tool
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 Microsoft virus and malware community for more help.
Remove browser add-ons
You may need to remove add-ons from your browser. You can find out how to do this in the following articles:
- Manage add-ons in Internet Explorer
- Disable or remove Add-ons in Firefox
- Uninstall extensions in Chrome
Remove program exceptions in the firewall
This threat might add itself to your Windows Firewall exception list. This means it can go online without being blocked. To remove it from the exception list, do the following:
- Open Windows Firewall by swiping in from the right edge of the screen, tapping Search (or if you're using a mouse, pointing to the upper-right corner of the screen, moving the mouse pointer down, and then clicking Search), entering firewall in the search box, tapping or clicking Settings, and then tapping or clicking Windows Firewall.
- In the left pane, tap or click Allow an app or feature through Windows Firewall.
- Tap or click Change settings. You might be asked for an admin password or to confirm your choice.
- Select the check box next to the app you want to allow, select the network types you want to allow communication on, and then click OK.
For Windows 7:
- Click Start, select Control Panel, then System and Security.
- Select Windows Firewall.
- On the menu on the left, select Allow a program through Windows Firewall. If you're prompted, type the password or provide confirmation.
- Click Change Settings. If you're prompted, type the password or provide confirmation.
- Select <program name> from the list of allowed programs and features. Click Remove.
- Click OK.
For Windows Vista:
- Click Start, select Control Panel, then Security Center.
- On the menu on the left, select Windows Firewall.
- On the menu on the left, select Allow a program through Windows Firewall. If you are prompted, type the password or provide confirmation.
- Select <program name> from the list of allowed programs and features. Click Delete.
- Click OK.
For Windows XP:
- Use an administrator account to log on.
- Click Start, select Run, type wscui.cpl, and then click OK.
- In Windows Security Center, click Windows Firewall.
- On the Exceptions tab, click <program name> and then click Delete.
- Click OK.