Published Nov 19, 2012 | Updated Mar 16, 2018


Severe |Detected with Windows Defender Antivirus

Aliases: No associated aliases


Windows Defender Antivirus  detects and removes this threat.

This CoinMiner trojan mines Electroneum cryptocurrency, but its code could support mining other cryptocurrencies. Like other miners, it can cause infected computers to run slower than usual.

TrojanDownloader:Win32/Dofoil.AB has been observed downloading this coin mining trojan and dropping it into the Temp folder as wuauclt.exe.

On March 6, 2018, behavior monitoring and machine learning technologies in Windows Defender Antivirus stopped a Dofoil malware (also known as Smoke Loader) that tried to infect more than 400,000 computers. The massive campaign aimed to install a Trojan:Win32/CoinMiner variant that uses victim computers' resources for coin mining purposes. Learn how artificial intelligence stopped the attack within minutes:

Behavior monitoring combined with machine learning spoils a massive Dofoil coin mining campaign

Learn more about this type of threat: Invisible resource thieves: The increasing threat of cryptocurrency miners

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.

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 Antivirus for Windows 10. 

Go to Settings > Update & security > Windows Defender > Windows Defender Security Center > Virus & threat protection> Virus & threat protection settings, and make sure that your Cloud-based Protection settings is turned On.

Get more help

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

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