[Oisf-devel] SNORT alert on Suricata with Napatech

Dezs dezso.soos at gmail.com
Tue Oct 8 06:33:00 UTC 2019

Dear Members,

I need some help with the problem below.
The SNORT rule does not generate alarms in all cases.
The Napatech card uses all the 20 streams according to the Suricata.yaml
configuration file (attached).
It alerts only in case of HTTP 80 and only 5 times of 100 dowloaded eicar
test file..

Suricata 3.2.1; Debian.

alert tcp any any -> any any (msg:"POLICY-OTHER eicar test string download
attempt"; flow:to_client,established; file_data;
content:"7CC)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+"; fast_pattern:only;
metadata:policy balanced-ips drop, policy max-detect-ips drop, policy
security-ips drop; reference:url,www.eicar.org/86-0-Intended-use.html;
classtype:misc-activity; sid:37732; rev:3;)

Any ideas are appreciated.

Best Regards,
Dezső Soós
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