Published Jan 20, 2009 | Updated Sep 15, 2017


Severe |Detected with Windows Defender Antivirus

Aliases: :Trj/DNSChanger.NY (Panda) Trojan-Downloader.Win32.Calac.ajq (Kaspersky) Trojan-Downloader.Win32.Agent.arts (Kaspersky)


TrojanDownloader:Win32/Horst.Q is the trojan downloader component of the Win32/Horst malware family. It connects to certain websites to download arbitrary files, which may be other malware.
Manual removal is not recommended for this threat. To detect and remove this threat and other malicious software that may have been installed, run a full-system scan with an up-to-date antivirus product such as the Microsoft Safety Scanner ( For more information, see
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