W32.HLLW.Walrain

Risk Level 1: Very Low

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Discovered:: September 3, 2002
Updated:: February 13, 2007 11:40:17 AM
Type:: Worm
Systems Affected:: Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows XP

W32.HLLW.Walrain is a worm that attempts to spread across file-sharing networks such as KaZaA, iMesh, Morpheus, Gnutella and NeoModus. It disguises itself as a porno-related program to trick users into downloading and opening it. W32.HLLW.Walrain is written using the Microsoft Visual Basic programming language and may be compressed with ASPack.

Antivirus Protection Dates

Initial Rapid Release version September 3, 2002
Latest Rapid Release version September 3, 2002
Initial Daily Certified version September 3, 2002
Latest Daily Certified version September 3, 2002
Initial Weekly Certified release date September 4, 2002

Click for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment

Wild

Wild Level: Low
Number of Infections: 0 - 49
Number of Sites: 0 - 2
Geographical Distribution: Low
Threat Containment: Easy
Removal: Moderate

Damage

Damage Level: Low

Distribution

Distribution Level: Medium

Writeup By: Yana Liu

Technical Details

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Internet Security Threat Report, Volume 16