W32.HLLW.Graps

Risk Level 1: Very Low

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Discovered:: July 7, 2003
Updated:: February 13, 2007 12:03:31 PM
Also Known As:: W32/Graps.worm [McAfee], Worm.Win32.Graps [KAV], W32/Graps-A [Sophos], Win32.Graps [CA]
Type:: Worm
Systems Affected:: Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows XP

W32.HLLW.Graps is a network-aware worm that has Backdoor capabilities. By default, it opens port 45836 for listening. The worm copies itself to available network shares by connecting with weak passwords.

This worm is a Visual Basic application compiled to native code. It may be packed with UPX v1.24. The unpacked file size is 192,512 bytes.

Antivirus Protection Dates

Initial Rapid Release version July 7, 2003
Latest Rapid Release version September 28, 2010 revision 054
Initial Daily Certified version July 7, 2003
Latest Daily Certified version September 28, 2010 revision 036
Initial Weekly Certified release date July 9, 2003

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: 3 - 9
Geographical Distribution: Low
Threat Containment: Easy
Removal: Moderate

Damage

Damage Level: Medium

Distribution

Distribution Level: Medium

Writeup By: Sergei Shevchenko

Technical Details

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Internet Security Threat Report, Volume 16