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A  U  S  C  E  R  T                                           A  L  E  R  T

                       AL-2006.0126 -- AUSCERT ALERT
                                   [Win]
     Increased levels of port 2967 scanning activity - W32.Sagevo worm
                             19 December 2006

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        AusCERT Alert Summary
        ---------------------

Product:              Symantec Client Security 3.x
                      Symantec Antivirus Corporate Edition 10.x
Operating System:     Windows
Impact:               Execute Arbitrary Code/Commands
Access:               Remote/Unauthenticated
CVE Names:            CVE-2006-2630
Member content until: Tuesday, January 16 2007

Ref:                  AL-2006.0042

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OVERVIEW:
        
        AusCERT and other entities [1] have observed an notable increase in 
        traffic to TCP port 2967. Indications are that the cause of this 
        activity is a new worm, W32.Sagevo [2] (aka: Big Yellow [3]), which 
        propagates by exploiting a vulnerability in Symantec Client Security 
        and Symantec Anti-virus products. Other recent malware has also 
        exploited this vulnerability [4], however, this malware appears to 
        be more widespread.


IMPACT: 

        Reports state that this worm downloads the Trojan Horse malware, 
        Backdoor.Wualess.B [5] from 61.172.250.59:12345 or 
        ftpd.3322.org:21211; however there may be other sites used to 
        download additional malware. This malware opens a backdoor and may 
        result in the execution of arbitrary code on the infected systems as 
        well as perform scanning and exploitation of this vulnerability in 
        order to propagate.


MITIGATION:

        Administrators are encouraged to:

          * Patch machines against the vulnerabilities exploited by this 
            worm [6].

          * Block traffic to Symantec System Center services at the 
            perimeter on TCP and UDP port 2967.

          * Monitor for outgoing connections to 61.172.250.59:12345 and 
            ftpd.3322.org:21211 and/or to any host with a destination port 
            2967 which may indicate a compromised system downloading
            additional malware and/or scanning for further propagation.


REFERENCES:

        [1] SANS ISC - Port 2967 TCP/UDP
            http://isc.sans.org/port_details.php?port=2967

        [2] Symantec.com - W32.Sagevo
            http://www.symantec.com/enterprise/security_response/writeup.jsp?docid=2006-121309-3331-99&tabid=1

        [3] eEye Digital Security - Worm Alert: Big Yellow
            http://research.eeye.com/html/alerts/AL20061215.html

        [4] AA-2006.0095 -- [Win] -- W32.Spybot.ACYR worm spreading via 
            Symantec and Windows vulnerabilities
            https://www.auscert.org.au/7022

        [5] Symantec.com - Backdoor.Wualess.B 
            http://www.symantec.com/enterprise/security_response/writeup.jsp?docid=2006-121511-2214-99&tabid=2

        [6] Symantec.com - SYM06-010 Symantec Client Security and Symantec 
            AntiVirus Elevation of Privilege
            http://www.symantec.com/avcenter/security/Content/2006.05.25.html

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        http://www.auscert.org.au/render.html?it=3192

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
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