Strange UDP packets to non-existent network.

From: Christopher Lyon (cslyon_at_netsvcs.com)
Date: 08/19/03

  • Next message: Jeff Peterson: "RE: Software vendor clueless"
    Date: Mon, 18 Aug 2003 15:38:54 -0700
    To: <incidents@securityfocus.com>
    
    

    I am seeing something odd and wanted to run it by everybody. Below are
    some packet captures for everybody's review. The 192.168.254.4 is our
    exchange server running on Windows 2000. It is constantly streaming out
    these UDP packets to 192.168.40.1, 192.168.73.1, and a few other
    192.168.x.x addresses. The dominant ones are 192.168.40.1 and
    192.168.73.1. They all have the same rotating payload but the dst udp
    ports start at 1658+ and 1677+. So, you are saying at this point, what's
    the big deal, so something is talking to 192.168.40.1, 73.1 and xx.xx on
    your internal network? Well we don't use these addresses at all and
    never have used these. So, the question is, what is this box trying to
    do? Has anybody seen this?

    Header and Payload
    14:52:54.907608 192.168.254.4.14884 > 192.168.40.1.1658: udp 8
    000 : E8 28 1A 01 CB 44 F9 77 .(...D.w

    Header and Payload
    14:52:54.908789 192.168.254.4.14889 > 192.168.40.1.1677: udp 8
    000 : E8 28 4C 01 CB 44 F9 77 .(L..D.w

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  • Next message: Jeff Peterson: "RE: Software vendor clueless"