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W32.Korgo.S

Risk Level 2: Low

Discovered:
June 21, 2004
Updated:
February 13, 2007 12:24:32 PM
Also Known As:
Worm.Win32.Padobot.n [Kaspersk, W32/Korgo.worm.s [McAfee], WORM_KORGO.S [Trend], W32/Korgo-S [Sophos], Win32.Korgo.V [Computer Associ
Type:
Worm
Systems Affected:
Windows 2000, Windows XP


W32.Korgo.S is a variant of W32.Korgo.N. This worm attempts to propagate by exploiting the Microsoft Windows LSASS Buffer Overrun Vulnerability (described in Microsoft Security Bulletin MS04-011) on TCP port 445. It also listens on TCP port 113 and other random ports between 2000 and 8192.

Notes:
  • Definitions dated prior to June 28, 2004 detect this threat as W32.Korgo.M.
  • Symantec Security Response has developed a removal tool to clean the infections of W32.Korgo.S.


Antivirus Protection Dates

  • Initial Rapid Release version June 22, 2004
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version June 22, 2004
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date June 23, 2004
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment

Wild

  • Wild Level: Low
  • Number of Infections: 50 - 999
  • Number of Sites: More than 10
  • Geographical Distribution: Low
  • Threat Containment: Easy
  • Removal: Moderate

Damage

  • Damage Level: Medium

Distribution

  • Distribution Level: Medium
Writeup By: Yana Liu

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