Skip to main content
Microsoft Security Intelligence
Published Mar 29, 2015 | Updated Jul 24, 2019


Detected by Microsoft Defender Antivirus

Aliases: Trojan-Downloader.JS.Agent.hdm (Kaspersky) JS/Downloader (McAfee) Troj/JSDldr-AT (Sophos) JS.Downloader (Symantec)


Microsoft Defender Antivirus detects and removes this threat.

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

The trend towards increasingly sophisticated malware behavior, highlighted by the use of exploits and other attack vectors, makes older platforms so much more susceptible to ransomware attacks. From June to November 2017, Windows 7 devices were 3.4 times more likely to encounter ransomware compared to Windows 10 devices.

Read our latest report: A worthy upgrade: Next-gen security on Windows 10 proves resilient against ransomware outbreaks in 2017.

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