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Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.


Threat LevelModerate threatDamageHighDistributionNot widespread
Common name:Opaserv.J
Technical name:W32/Opaserv.J
Threat level:Low
Effects:  It spreads across networks and attempts to connect to a webpage to update itself.

Affected platforms:

Windows ME/98/95

Detection updated on:Oct. 29, 2007
Proactive protection:
Yes, using TruPrevent Technologies
Repair utility:Panda QuickRemover

Brief Description 


Opaserv.J is a worm that doesn't have any destructive effects, whose main aim is to spread to other computers, especially if they are connected to a network. It does this by exploiting a vulnerability in Windows Me/98/95.

Opaserv.J spreads across shared network drives, infecting computers that are connected to other computers that are infected with this virus.

Once it has carried out its infection, Opaserve.J tries to connect to the web page in order to download updates for it components and therefore, change some of its characteristics.

Visible Symptoms 


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