is there no content?

----- Original Message -----
From: <sec_slave (at) hushmail (dot) com [email concealed]>
To: <intrusions (at) incidents (dot) org [email concealed]>; <incidents (at) securityfocus (dot) com [email concealed]>
Sent: Tuesday, June 03, 2003 2:03 PM
Subject: Help with an odd log file...

>
> -----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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