W32.HLLW.Gaobot.AE

W32.HLLW.Gaobot.AE is a minor variant of W32.HLLW.Gaobot.AA that attempts to spread to network shares with weak passwords. The worm also allows for a hacker to access an infected computer through IRC.

The worm uses the following vulnerabilities:

• The DCOM RPC vulnerability, described in Microsoft Security Bulletin MS03-026, using TCP port 135. The worm specifically targets Windows XP machines using this exploit.
• The RPC locator vulnerability, described in Microsoft Security Bulletin MS03-001, using TCP port 445.

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

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Note: Virus definitions dated prior to September 11, 2003 may detect this threat as W32.HLLW.Gaobot.AA.

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Protection

• Initial Rapid Release version September 11, 2003
• Latest Rapid Release version March 3, 2008 revision 035
• Initial Daily Certified version September 11, 2003
• Latest Daily Certified version March 3, 2008 revision 037
• Initial Weekly Certified release date September 11, 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