Help with an odd log file...

sec_slave_at_hushmail.com
Date: 06/03/03

  • Next message: John McCracken: "RE: Dubious e-mail: [Fwd: Dell.com (Password Request)]" 
    Date: Tue,  3 Jun 2003 14:03:36 -0700
To: intrusions@incidents.org, incidents@securityfocus.com

    -----BEGIN PGP SIGNED MESSAGE-----
    Hash: SHA1

    Hello.

    I am looking for some assistance in trying to identify the nature of
    a suspected scan/attack against my corporate network.

    The scan/attack includes spoofed source addresses that cover a wide range
    of IP networks. There is also a relationship between source and
    destination addresses and ports for each entry. Each combination of
    address and port information appears between 3 and 8 times, all trickled
    in over a 3 day period. Normally, something like this might be identified
    as a TCP SYN SCAN, but the traffic is coming in too slowly and the destination
    ports are all upper level ports (as you can see).

    The pattern is one with which I am not familiar and would appreciate
    your assistance in identifying.

    Thnx,

    Sorted by source IP:

    Date/Time Source IP/Port Dest IP/Port
    May 25 13:53:48 2.66.161.64:55518 XX6.X37.153.7:61323
    May 26 04:34:53 2.66.161.64:55518 XX6.X37.153.7:61323
    May 26 23:29:58 2.66.161.64:55518 XX6.X37.153.7:61323
    May 27 08:20:55 2.66.161.64:55518 XX6.X37.153.7:61323
    May 27 15:39:08 2.66.161.64:55518 XX6.X37.153.7:61323
    May 26 12:03:34 2.71.250.0:54845 XX6.X37.54.171:5929
    May 26 20:54:18 2.71.250.0:54845 XX6.X37.54.171:5929
    May 27 16:49:56 2.71.250.0:54845 XX6.X37.54.171:5929
    May 25 06:18:33 2.86.7.241:56883 XX6.X37.41.151:21012
    May 25 10:16:48 2.86.7.241:56883 XX6.X37.41.151:21012
    May 26 05:04:11 2.86.7.241:56883 XX6.X37.41.151:21012
    May 27 07:28:50 2.86.7.241:56883 XX6.X37.41.151:21012
    May 27 15:37:04 2.86.7.241:56883 XX6.X37.41.151:21012
    May 27 16:28:04 2.86.7.241:56883 XX6.X37.41.151:21012
    May 27 10:11:14 2.95.43.255:12430 XX6.X37.29.228:9577
    May 25 08:30:38 2.95.43.255:12430 XX6.X37.29.228:9577
    May 26 07:56:32 2.95.43.255:12430 XX6.X37.29.228:9577
    May 26 18:55:34 2.95.43.255:12430 XX6.X37.29.228:9577
    May 26 20:22:41 2.95.43.255:12430 XX6.X37.29.228:9577
    Etc.

                    ---break for brevity's sake---
                          6353 lines removed

    May 26 05:38:31 221.237.154.247:45635 XX6.X37.48.56:8199
    May 26 08:13:10 221.237.154.247:45635 XX6.X37.48.56:8199
    May 26 09:23:33 221.237.154.247:45635 XX6.X37.48.56:8199
    May 26 17:30:12 221.237.154.247:45635 XX6.X37.48.56:8199
    May 27 09:55:22 221.237.154.247:45635 XX6.X37.48.56:8199
    May 25 18:02:24 222.6.30.78:55945 XX6.X37.12.103:32430
    May 26 23:28:25 222.6.30.78:55945 XX6.X37.12.103:32430
    May 27 03:23:43 222.6.30.78:55945 XX6.X37.12.103:32430
    May 26 09:12:56 222.12.8.159:40062 XX6.X37.39.135:43096
    May 26 23:02:06 222.12.8.159:40062 XX6.X37.39.135:43096
    May 26 23:53:30 222.12.8.159:40062 XX6.X37.39.135:43096
    May 27 13:32:13 222.12.8.159:40062 XX6.X37.39.135:43096
    May 26 12:28:58 222.20.24.164:3281 XX6.X37.21.175:27751
    May 26 21:26:42 222.20.24.164:3281 XX6.X37.21.175:27751
    May 26 22:10:47 222.20.24.164:3281 XX6.X37.21.175:27751
    May 27 11:04:40 222.20.24.164:3281 XX6.X37.21.175:27751
    May 27 13:31:51 222.20.24.164:3281 XX6.X37.21.175:27751
    May 27 15:36:37 222.20.24.164:3281 XX6.X37.21.175:27751
    Etc.

    Captured Frame Sample:

    Frame 1 (66 bytes on wire, 66 bytes captured)
        Arrival Time: May 27, 2003 14:13:58.220746000
        Time delta from previous packet: 0.000000000 seconds
        Time relative to first packet: 0.000000000 seconds
        Frame Number: 1
        Packet Length: 66 bytes
        Capture Length: 66 bytes
    Ethernet II, Src: 00:00:0c:95:72:bd, Dst: 00:60:91:0b:45:35
        Destination: 00:60:98:0d:45:35 (3Com_0d:45:35)
        Source: 00:00:0c:95:78:bd (Cisco_95:78:bd)
        Type: IP (0x0800)
    Internet Protocol, Src Addr: 155.128.250.228 (155.128.250.228), Dst Addr:
    XX6.X37.151.97 (XX6.X37.151.97)
        Version: 4
        Header length: 20 bytes
        Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00)
            0000 00.. = Differentiated Services Codepoint: Default (0x00)
            .... ..0. = ECN-Capable Transport (ECT): 0
            .... ...0 = ECN-CE: 0
        Total Length: 52
        Identification: 0xb82b
        Flags: 0x00
            .0.. = Don't fragment: Not set
            ..0. = More fragments: Not set
        Fragment offset: 0
        Time to live: 118
        Protocol: TCP (0x06)
        Header checksum: 0xc248 (correct)
        Source: 155.128.250.228 (155.128.250.228)
        Destination: XX6.X37.151.97 (XX6.X37.151.97)
    Transmission Control Protocol, Src Port: 866 (866), Dst Port: 26469 (26469),
     Seq: 1409168989, Ack: 0, Len: 0
        Source port: 866 (866)
        Destination port: 26469 (26469)
        Sequence number: 1409168989
        Header length: 32 bytes
        Flags: 0x0002 (SYN)
            0... .... = Congestion Window Reduced (CWR): Not set
            .0.. .... = ECN-Echo: Not set
            ..0. .... = Urgent: Not set
            ...0 .... = Acknowledgment: Not set
            .... 0... = Push: Not set
            .... .0.. = Reset: Not set
            .... ..1. = Syn: Set
            .... ...0 = Fin: Not set
        Window size: 55808
        Checksum: 0xd5a2 (correct)
        Options: (12 bytes)
            Maximum segment size: 1460 bytes
            NOP
            Window scale: 2 (multiply by 4)
            NOP
            NOP
            SACK permitted
    -----BEGIN PGP SIGNATURE-----
    Note: This signature can be verified at https://www.hushtools.com/verify
    Version: Hush 2.3

    wkYEARECAAYFAj7dDSgACgkQbTw24P1BTGJXaQCgsLPS0niweOjKLZSIRKUVWioqoTAA
    oIDwlD0AxJojtPAhIdlunJmyAG1R
    =US/J
    -----END PGP SIGNATURE-----

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  • Next message: John McCracken: "RE: Dubious e-mail: [Fwd: Dell.com (Password Request)]"
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