Published Aug 22, 2008 | Updated Sep 15, 2017


Severe |Detected with Windows Defender Antivirus

Aliases: Win32/Puper.NO (CA) Troj/Zlob-ALO (Sophos) Trojan-Downloader.Win32.Zlob.tnk (Kaspersky) Puper (McAfee) Trojan.Zlob (Symantec) TrojanDownloader:Win32/Zlob.gen!BD (Microsoft) TrojanDownloader:Win32/Zlob.gen!BZ (Microsoft)


TrojanDownloader:Win32/Zlob.gen!BL is a generic detection for a trojan downloader member of the Zlob family. It installs a BHO (Browser Helper Object) in the system. It may also modify the default browser search engine to redirect searches to a certain web site.
Manual removal is not recommended for this threat. Use Microsoft Security Essentials or another up-to-date scanning and removal tool to detect and remove this threat and other unwanted software from your computer. For more information on Microsoft security products, see
This threat may make lasting changes to an affected system’s configuration that will NOT be restored by detecting and removing this threat. For more information on returning an affected system to its pre-infected state, please see the following article/s:
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