Published May 18, 2017 | Updated Jul 17, 2017


Severe |Detected with Windows Defender Antivirus

Aliases: W32.Eternalrocks (Symantec) MicroBotMassiveNet (other)


Windows Defender Antivirus  detects and removes this threat.

This threat downloads and installs other programs, including other malware, onto your PC without your consent.

For those organizations who have not yet applied the security update, we suggest you immediately deploy Microsoft Security Bulletin MS17-010 if you have not already done so.

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.

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:

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 Settings > Update & Security > Windows Defender > Open Windows Defender Security Center > Virus & threat protection> Virus & threat protectionsettings and make sure that your Cloud-delivered 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

If you think that an application has been wrongfully identified, submit the file here along with the detection name in the comments section.

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