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Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

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Threat LevelModerate threatDamageHighDistributionNot widespread
Common name:Opaserv
Technical name:W32/Opaserv
Threat level:Low
Alias:Bck/Opasoft,, WORM_OPASOFT.A
Subtype: Trojan
Effects:  It spreads across networks and attempts to connect to a webpage to update itself.

Affected platforms:

Windows ME/98/95

First detected on:Sept. 30, 2002
Detection updated on:Nov. 9, 2007
Proactive protection:
Yes, using TruPrevent Technologies

Brief Description 


Opaserv is a worm that spreads through shared network drives and exploits a vulnerability in Windows Me/98/95. Its main action consists of connecting to the  page in order to download updates.

Visible Symptoms 


Opaserv is difficult to recognize, as it does not display any messages or warnings that indicate that it has infected a computer.