port 5168

From: Molony, Duncan (Duncan.Molony@SPR.DOE.GOV)
Date: 04/17/03

  • Next message: Nicolas Couture: "Re: Logging of connects to port 6346"
    Date: Thu, 17 Apr 2003 13:03:42 -0500
    From: "Molony, Duncan" <Duncan.Molony@SPR.DOE.GOV>
    To: <incidents@securityfocus.com>
    
    

    In the past 2 hours I have captured over 18,000 packets attempting to initiate a connection on port 5168/TCP. All traffic is on my internal network. The machines orginating the traffic are Windows 2000 servers - one running SAP w/ Oracle and one running Citrix for development purposes only. In all but one case so far, the systems targeted have responded with a reset. The one that did respond opened a 'DCERPC' connection briefly and then closed the connection. From what I have found so far, DCERPC should only be listening on port 135. Source ports seem to be random. So far it looks to have hit every active address in the subnet I am sniffing.
     
    Below is a sample of the SYN packet being sent out. Any assistance in identifying this traffic would be greatly appreciated.
     
    04/17-09:56:12.106932 0:D0:D3:35:D3:EC -> 0:4:75:CB:87:CF type:0x800 len:0x3E
    xxx.xxx.xxx.48:2720 -> xxx.xx.xxx.31:5168 TCP TTL:127 TOS:0x0 ID:21131 IpLen:20 DgmLe
    n:48 DF
    ******S* Seq: 0xE6169382 Ack: 0x0 Win: 0x4000 TcpLen: 28
    TCP Options (4) => MSS: 1460 NOP NOP SackOK

     
    Thanks in advance,
     
    Duncan Molony

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  • Next message: Nicolas Couture: "Re: Logging of connects to port 6346"

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