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Microsoft Security Intelligence
Published Feb 11, 2010 | Updated Sep 15, 2017

Trojan:JS/Koobface.C

Detected by Microsoft Defender Antivirus

Aliases: HTML/FraudL.b.16546 (other) Trojan-Downloader.HTML.FraudLoad.b (Kaspersky) Downloader-QG (McAfee)

Summary

Trojan:JS/Koobface.C is a detection for a malicious JavaScript that displays a "Flash video" graphic and requests the user to download an executable to watch the video. The executable is detected as a variant of Win32/Koobface.
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 Microsoft Security Essentials, or the Microsoft Safety Scanner. For more information about using antivirus software, see http://www.microsoft.com/security/antivirus/av.aspx.
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