W32.HLLW.Gaobot.CB

W32.HLLW.Gaobot.CB is a minor variant of W32.HLLW.Gaobot.AO. It attempts to spread to network shares that have weak passwords and allows hackers to access an infected computer through an IRC channel.

The worm uses multiple vulnerabilities to spread, including:

• The DCOM RPC vulnerability (described in Microsoft Security Bulletin MS03-026) using TCP port 135
• The RPC locator vulnerability (described in Microsoft Security Bulletin MS03-001) using TCP port 445
  
  W32.HLLW.Gaobot.CB is compressed with Neolite.

Protection

• Initial Rapid Release version November 17, 2003
• Latest Rapid Release version March 3, 2008 revision 035
• Initial Daily Certified version November 17, 2003
• Latest Daily Certified version March 3, 2008 revision 037
• Initial Weekly Certified release date November 17, 2003

Click here 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: Easy

Damage

• Damage Level: Low

Distribution

• Distribution Level: Low