Decodes the packets in alerts

Hello

Is it possible to start and that dictate the length of the packet decodes the sensor?

For example, I don't get a decoding for netbios name invalid (3357), but do it for the color of the Image system Windows Management (6984).

example:

context:
fromAttacker:
0TH 00.0 000000 30 00 00 00 00 00 00 02 00 00 00 01 00 01...
000010 00 00 00 00 00 00 20 07 67 40 63 00 65 30 00 6F... [email protected]/ * /.
000020 74 00 6 00 79 00 20 00 75 00 01 00 00 04 00 00 t.l.y.. u.......
000030 00 00 20 07 4B C8 00 30 30 00 00 00 00 00 00 0F... . K.. 0.0...
000040 02 00 00 00 0 B 00 01 00 00 00 00 00 00 00 20 07....
000050 C8 4 B 00 0F K 30 30 00 00 00 00 00 00 02 00 00 00... 0.0..........
000060 0 B 00 01 00 00 00 00 00 00 00 20 07 C8 4 B 00 30.... K.. 0
0F 000070 30 00 00 00 00 00 00 02 00 00 00 0 B 00 01 00.0...
000080 00 00 00 00 00 00 20 07 4B 00 C8 0F 30... 30 00 00. K.. 0.0...
000090 00 00 00 00 02 00 00 00 0 B 00 01 00 00 04 00 00...
0000A0 00 00 20 07 C8 4 B 00 30 08 30 00 00 00 00 00 00... . K.. 0.0...
0000B0 02 00 00 00 01 00 01 00 00 00 00 00 00 00 20 07....
C8 4B 0 C 0000 00 0F K 30 30 00 00 00 00 00 00 02 00 00 00... 0.0..........
D 0000 0 0 B 00 01 00 00 00 00 00 00 00 20 07 C8 4 B 00 30.... K.. 0
0000E0 0F 30 00 00 00 00 00 00 02 00 00 00 0 B 00 01 00.0...
0000F0 00 00 00 00 00 00 20 07 6F A 40 64 00 65 30 3, 00... [email protected]/ * /:

fromTarget:
000000 73 65 73 65 73 73 69 3F 6th 69 64 43 46 30 3D 6F is? SessionID = CF0
000010 32 42 30 31 39 41 49 44 30 30 30 30 30 35 33 2B019AID_0000053 5F
000020 32 38 30 30 35 30 30 30 30 30 30 30 30 26 63 61 2800500000000 & ca
000030 73 65 69 64 3D 35 30 34 39 38 34 26 63 61 73 65 seid = 504984 & case
000040 74 72 61 6 73 66 65 72 66 6 61 67 59 0a transferflag 0D 3D = Y...
000050 41 63 63 65 70 74 2D 4 c 61 6th 67 75 61 67 65 3A Accept-Language:
000060 20 65 6th 2D 67 62 0 a 41 63 63 65 70 74 2D 45 en 0D - en... Accept-E
000070 6E 63 6F 64 69 6 67 3A 20 7 a 67 69 70 2 20 64 ncoding: gzip, d
000080 65 66 6 61 74 65 0 a 55 73 65 72 2D 41 67 65 eflate 0D... Age of user
000090 6th 74 3 20-4 6F 7 a 69 6 6 61 2F 34 2nd 30 20 nt: Mozilla/4.0
0000A 0 28 and 63 6F 6 70 61 74 69 62 3 b 6 65 and 20 4 d 53 49 (compatible; MSI
0000B 0 45 20 36 3 B 30 2E 20 57 69 6 64 77 73 20 6F 4TH E 6.0; Windows N
0000 0 54 20 35 C 2ND 31 3B 20 53 56 31 3 B 20 47 54 42 36 T 5.1. SV1; GTB6
0000 D 0 29 0D 0 A 48 6F 73 74 3 HAS 20 31 30 2 32 33 32 2ND)... Host: 10.232.
31 36 0000E0 2nd 37 0 a 43 6F 6F 65 63 74 69 6F 6th 0D 6th 16.7.Connection
0000F0 3A 20 4 b 65 65 and 70 2D 41 6 69 76 65 0 to 0D 0 to 0D: Keep-Alive...

Some alerts also justify a greater capture for example web addresses correctly false positive traffic.

Any help would be gratfeully received.

Can BTW I see events IPS from the CLI on the unit?

Thank you

Mark

There are two types of capture of packets on the IPS sensors. One you can watch

is included in the alert. It is defined by selecting the option 'products-verbose-alert' on the associated signature. There are no other options for this method of the packet capture.

Second how to do screenshots of package are, it's the 'journal-attacter-packages' and 'newspaper-victim-packages' (select these as a pair). They will create a PCAP file on the sensor with X number of captured packets. X is definable on a global basis for all signature captures (not on a basic GIS GIS).

You can see alerts only the CLI with these commands:

See the events warn past 01:00 (to view alerts for the last hour + current alerts that they roll)

-Bob

Tags: Cisco Security

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