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Published May 18, 2009 | Updated Sep 15, 2017


Detected with Windows Defender Antivirus

Aliases: Packed.Win32.Tdss (Kaspersky) FakeAlert-CT (McAfee) Mal/UnkPack-Fam (Sophos) Win32/Razbho.A (CA) Packed.Win32.Krap (other) Backdoor.Tidserv (Symantec)


TrojanDownloader:Win32/Rugzip.A is a trojan that downloads other malware from predefined Web sites. Examples of malware downloaded by this trojan can include Trojan:Win32/Alureon.gen!J, TrojanDownloader:Win32/FakeRean, and Trojan:Win32/Meredrop.
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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