W32.HLLW.Gaobot.AZ

W32.HLLW.Gaobot.AZ is a minor variant of W32.HLLW.Gaobot.AP that attempts to spread to network shares and allows access to 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
• The WebDav vulnerability (described in Microsoft Security Bulletin MS03-007) using TCP port 80
  

W32.HLLW.Gaobot.AZ is compressed with UPX.

Protection

• Initial Rapid Release version October 17, 2003
• Latest Rapid Release version October 17, 2003
• Initial Daily Certified version October 17, 2003
• Latest Daily Certified version October 17, 2003
• Initial Weekly Certified release date October 22, 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: Moderate

Damage

• Damage Level: Medium

Distribution

• Distribution Level: Medium