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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Encyclopedia GetVirusCard True 0

Snapper.A

 
Threat LevelModerate threatDamageHighDistributionNot widespread
Common name:Snapper.A
Technical name:W32/Snapper.A.worm
Threat level:Low
Alias:I-Worm.Snapper, W32.Snapper.A@mm
Type:Worm
Effects:  It exploits two Internet Explorer vulnerabilities in order to spread via e-mail.

Affected platforms:

Windows 2003/XP/2000/NT/ME/98/95

Detection updated on:March 24, 2004
StatisticsNo

Brief Description 

    

Snapper.A is a worm that spreads via e-mail. It is automatically activated when the e-mail message is viewed through Outlook's Preview Pane. It does this by exploiting a vulnerability in Internet Explorer, which allows e-mail attachments to be automatically run. This vulnerability exploit is known as Exploit/iFrame.

This exploit points to an HTML page, from which a file with a CGI extension is downloaded. This file exploits another vulnerability, known as Object Data Remote Execution, in order to run a Visual Basic Script code, which creates a DLL (Dynamic Link Library) in the Windows directory. This DLL provides the functionalities of the worm.

Snapper.A checks if several processes are active. For example, NAVAPW32.EXE, CCAPP.EXE, OUTPOST.EXE and SPIDERML.EXE.

Visible Symptoms 

    

Snapper.A is difficult to recognize, as it does not show any messages or warnings that indicate it has reached the computer.