[Oisf-devel] two alerts for one content, why?

rmkml rmkml at yahoo.fr
Tue Jun 26 23:51:22 UTC 2012


Hi,

ok Im joigned a pcap file contains a ssh server Dropbear, but Im curious why Suricata fire two times ?

# with this sig, suricata fire two times:
alert tcp any 22 -> any any (msg:"dropbear detect 2"; flow:to_client,established; content:"SSH-"; depth:4; offset:0;
content:"dropbear_"; nocase; within:40; distance:0; classtype:attempted-admin; sid:990995; rev:1; )

# with this sig, suricata fire one time:
alert tcp any 22 -> any any (msg:"dropbear detect 1"; flow:to_client,established; content:"dropbear_"; nocase; 
classtype:attempted-admin; sid:990994; rev:1; )

Anyone replay this test please?
If yes Im open a new redmine ticket.
Of course, snort fire one time per sig.
Tested suricata git at 24 jun.

Regards
Rmkml

http://twitter.com/rmkml
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