Aliases: Trojan-Downloader.JS.Agent.hdm (Kaspersky) JS/Downloader (McAfee) Troj/JSDldr-AT (Sophos) JS.Downloader (Symantec)
Windows Defender detects and removes this threat.
This family of threats are .zip attachments that, when opened, try to download and install other malware on your PC, including ransomware and information stealing malware, such as:
- Crowti, Tescrypt, and Locky, which encrypt your files and demand payment to decrypt them
- Fareit, which attempts to steal your passwords and personal information
- Ursnif, which records information about you and your PC
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.
This threat might install ransomware. See our ransomware page for more information.
Use the following free Microsoft software to detect and remove this threat:
- Windows Defender for Windows 10 and Windows 8.1, or Microsoft Security Essentials for Windows 7 and Windows Vista
- Microsoft Safety Scanner
- Microsoft Windows Malicious Software Removal Tool
You should also run a full scan. A full scan might find hidden malware.
Get more help
If you’re using Windows XP, see our Windows XP end of support page.