Published Sep 21, 2012 | Updated Sep 15, 2017


Severe |Detected with Windows Defender Antivirus

Aliases: Trojan horse DDoS.AC (AVG) Trojan.Nitol!434E (Rising AV) Backdoor.Nitol (Symantec) WORM_NITOL.SMB (Trend Micro)


Windows Defender detects and removes this threat.

This trojan can use your PC for distributed denial-of-service (DDoS) attacks without your knowledge.

The attack typically targets websites. It perfoms the attack by sending random data to the site. This malware is usually installed as a bundle from other software taken from peer-to-peer shares.

Find out ways that malware can get on your PC.

Use the following free Microsoft software to detect and remove this threat:

You should also run a full scan. A full scan might find hidden malware.

Get more help

You can also see our advanced troubleshooting page for more help.

If you’re using Windows XP, see our Windows XP end of support page.

Follow us