This threat was renamed to Trojan:Win32/Sefnit.AT in 2013.

If your Microsoft security software is reporting this detection, then you need to manually download and install updates immediately.

Windows Defender detects and removes this threat.

It uses your PC to do click fraud. It does this in the background, so you may not notice anything unusual.

If this threat is detected on your PC, it's likely you're infected with other malware from the Win32/Sefnit family. This malware family can give a malicious hacker access to your PC to download files and other malware.

This threat can be downloaded onto your PC by other malware, or it might have been bundled together with other software. Other variants of Win32/Sefnit are also downloaded through peer-to-peer sharing networks.

Microsoft security software detects and removes this family of threats.

This family of threats can allow backdoor access, download files, and use your PC and Internet connection for click fraud and bitcoin and Litecoin mining.

Some Sefnit versions can monitor Internet Explorer or Mozilla Firefox to hijack search results when you use search engines such as Bing, Yahoo!, and Google.

They can be downloaded by other malware, or bundled with other software and downloaded through peer-to-peer file sharing networks.

Find out ways that malware can get on your PC.

Windows Defender detects and removes this threat.

This threat is a part of the Win32/Sefnit family of trojans that can give a malicious hacker access to your PC. They can also download files onto your PC and use your Internet connection for click fraud.

This variant spreads itself on the eMule peer-to-peer network and can download other malware.

If you have this detected on your PC, then it's likely you're infected with other parts of the Win32/Sefnit family.

Windows Defender detects and removes this threat.

This threat is a part of the Win32/Sefnit family of trojans that can give a malicious hacker access to your PC. They can then download files and use your PC and Internet connection for click fraud.

This variant spreads itself on the eMule peer-to-peer network and can download other malware.

If you have this detected on your PC, then it's likely you're infected with other parts of the Win32/Sefnit family.