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Microsoft Security Intelligence
Published Oct 27, 2016 | Updated Sep 15, 2017

Worm:Win32/Dorkbot!ac

Detected by Microsoft Defender Antivirus

Aliases: Trojan.Cryptlock.N!g6 (Symantec)

Summary

Microsoft Defender Antivirus detects and removes this threat.

This threat can steal your user names and passwords by watching what you do online. It can also download other malware and stop you from visiting security-related websites.

It can be installed on your PC through an infected USB flash drive, or when you click a malicious link sent through instant messaging programs and social networks.

See the Win32/Dorkbot family description for more information.

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.

Protect your sensitive information

This threat tries to steal your sensitive and confidential information. If you think your information has been stolen, see:

You should change your passwords after you've removed this threat:

Scan removable drives

Remember to scan any removable or portable drives. If you have Microsoft security software, see this topic on our software help page:

Disable Autorun

This threat tries to use the Windows Autorun function to spread through removable drives, like USB flash drives. You can disable Autorun to prevent worms from spreading:

Use cloud protection 

Use cloud protection to help guard against the latest malware threats. It’s turned on by default for Microsoft Security Essentials and Windows Defender for Windows 10.  

Go to All settings > Update & security > Windows Defender and make sure that your Cloud-based Protection settings is turned On

Get more help

You can also see our advanced troubleshooting page for more help or search the Microsoft virus and malware community for more help.

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

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