RE: Traffic spoofed from Localhost 80 - NOT Nachi

"Aaron Lewis" <[email protected]>
Newsgroups gmane.comp.security.intrusions
Message-ID <013e01c4a2f7$be56d500$0b0aa8c0@zeus>
Please refer to http://www.adldatacomm.net/tips.html and click on 'Traffic
from 127.0.0.1 with a source port of 80'


Enjoy

-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of James C Slora Jr
Sent: Thursday, September 23, 2004 12:45 AM
To: [email protected]
Subject: [Intrusions] Traffic spoofed from Localhost 80 - NOT Nachi


This traffic just started today for the first time. The reporting device is
a router. Nothing inside it has ever had its host file altered in any
misguided Nachi defense.

These hits are all on the external router interface, at the perimeter. Only
one machine has been on that LAN during this period.

Any ideas besides the traditional Nachi suggestions? No user activity at all
was going on when this started. Notice also that the dest ports don't
increment in a pattern that indicates normal human ephemeral port usage, and
the intensity is not nearly high enough for anything Nachi-related. Some of
the ports appear several times.

I have not checked the machine out in person and do not have full packet
captures. There could be evil on the LAN, or this could just be some odd
probing going on from the outside.

2004-09-22 13:04:41	127.0.0.1	80	xx.xx.xx.xx	1898
2004-09-22 13:20:24	127.0.0.1	80	xx.xx.xx.xx	1530
2004-09-22 13:36:31	127.0.0.1	80	xx.xx.xx.xx	1713
2004-09-22 13:37:22	127.0.0.1	80	xx.xx.xx.xx	1969
2004-09-22 13:52:27	127.0.0.1	80	xx.xx.xx.xx	1841
2004-09-22 13:52:44	127.0.0.1	80	xx.xx.xx.xx	1337
2004-09-22 13:53:18	127.0.0.1	80	xx.xx.xx.xx	1097
2004-09-22 14:34:10	127.0.0.1	80	xx.xx.xx.xx	1237
2004-09-22 15:05:59	127.0.0.1	80	xx.xx.xx.xx	1284
2004-09-22 15:06:16	127.0.0.1	80	xx.xx.xx.xx	1780
2004-09-22 15:21:26	127.0.0.1	80	xx.xx.xx.xx	1653
2004-09-22 15:22:16	127.0.0.1	80	xx.xx.xx.xx	1909
2004-09-22 16:35:07	127.0.0.1	80	xx.xx.xx.xx	1096
2004-09-22 17:40:46	127.0.0.1	80	xx.xx.xx.xx	1530
2004-09-22 17:41:03	127.0.0.1	80	xx.xx.xx.xx	1794
2004-09-22 17:57:13	127.0.0.1	80	xx.xx.xx.xx	1209
2004-09-22 17:57:46	127.0.0.1	80	xx.xx.xx.xx	1969
2004-09-22 18:12:50	127.0.0.1	80	xx.xx.xx.xx	1841
2004-09-22 18:13:07	127.0.0.1	80	xx.xx.xx.xx	1337
2004-09-22 18:13:41	127.0.0.1	80	xx.xx.xx.xx	1097
2004-09-22 18:54:20	127.0.0.1	80	xx.xx.xx.xx	1237
2004-09-22 19:26:12	127.0.0.1	80	xx.xx.xx.xx	1284
2004-09-22 19:26:29	127.0.0.1	80	xx.xx.xx.xx	1780
2004-09-22 19:42:22	127.0.0.1	80	xx.xx.xx.xx	1909
2004-09-22 19:58:24	127.0.0.1	80	xx.xx.xx.xx	1827
2004-09-22 20:15:53	127.0.0.1	80	xx.xx.xx.xx	1898
2004-09-22 20:41:23	127.0.0.1	80	xx.xx.xx.xx	1530
2004-09-22 20:41:40	127.0.0.1	80	xx.xx.xx.xx	1794
2004-09-22 20:57:28	127.0.0.1	80	xx.xx.xx.xx	1713
2004-09-22 20:57:45	127.0.0.1	80	xx.xx.xx.xx	1209
2004-09-22 21:14:10	127.0.0.1	80	xx.xx.xx.xx	1097
2004-09-22 22:26:24	127.0.0.1	80	xx.xx.xx.xx	1284
2004-09-22 22:26:41	127.0.0.1	80	xx.xx.xx.xx	1780
2004-09-22 22:41:42	127.0.0.1	80	xx.xx.xx.xx	1653
2004-09-22 22:42:33	127.0.0.1	80	xx.xx.xx.xx	1909
2004-09-22 23:54:46	127.0.0.1	80	xx.xx.xx.xx	1096

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