Published Sep 12, 2007 | Updated Sep 15, 2017


Severe |Detected with Windows Defender Antivirus

Aliases: Puper (McAfee) TrojanDownloader:Win32/Zlob (Microsoft) Worm-Win32/Nuwar!ini (Sunbelt Software)


Backdoor:Win32/Nuwar.A!ini is a configuration file used by Backdoor:Win32/Nuwar.A!sys. The file is dropped by Backdoor:Win32/Nuwar.A!sys, and contains a list of peers to connect to, as well as other information pertaining to the Trojan’s distributed peer-to-peer network.
The file itself is not malicious, rather it is an indication of infection by Win32/Nuwar.
Backdoor:Win32/Nuwar may download and install additional malicious software, thus manual removal is not recommended. To detect and remove this Trojan 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, visit
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