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Published Mar 24, 2011 | Updated Sep 15, 2017


Detected with Windows Defender Antivirus

Aliases: W32/Bredolab.HM (Command) TR/Kazy.16615 (Avira) Trojan-Downloader.Win32.Small.btbv (Kaspersky) Backdoor:Win32/Hostil.gen!A (other) Mal/Bredo-K (Sophos) Trojan-Downloader.Win32.Small.btbf (Kaspersky)


TrojanDownloader:Win32/Chepvil.I is a trojan that attempts to download other malware from a remote server. In the wild, this trojan was observed to download files detected as Rogue:Win32/Winwebsec, Backdoor:Win32/Cycbot.B and VirTool:Win32/Injector.gen!BG.
To detect and remove this threat and other malicious software that may be installed on your computer, run a full-system scan with an appropriate, up-to-date, security solution. The following Microsoft products detect and remove this threat:
For more information on antivirus software, see
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