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TrojanDownloader:Win32/Nonaco.J
Detected by Microsoft Defender Antivirus
Aliases: TrojanClicker:Win32/Zirit.Y (Microsoft) Trojan:Win32/Adclicker.KT (Microsoft) Trojan-Dropper.Win32.Agent.vnl (Kaspersky) Troj/DldrBJ-Gen (Sophos) Win32/Puper!generic (CA) Puper (McAfee)
Summary
TrojanDownloader:Win32/Nonaco.J installs other malware including TrojanClicker:Win32/Zirit.Y and Trojan:Win32/Adclicker.KT. The installed malware visits a specific website repeatedly with a related side-affect to increase pay-per-click counts associated with the malware. It may also display pop-ups and download other malware from the predefined website.
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 (http://go.microsoft.com/fwlink/?LinkId=212742). For more information, see http://www.microsoft.com/protect/computer/viruses/vista.mspx.
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