[Filebeat] suricata fileset doesn't capture tls fields for alerts

[leehinman]

suricata/eve fileset doesn't map the TLS fields when event_type == alert.

This causes the events to not show up in the TLS tab in the SIEM.

Example:

{"flow":{"start":"2020-06-26T11:00:02.970011-0400","bytes_toclient":4660,"bytes_toserver":1074,"pkts_toclient":8,"pkts_toserver":7},"app_proto":"tls","tls":{"ja3s":{"string":"742,48172,30210-30","hash":"391231ba5675e42807b9e1f457b2614e"},"ja3":{"string":"718,4682-2687-2686-41992-41911-53292-53297-41969-22905-41926-41924-94181-94711-15-23-95-12-11-205,0-33-50-53-6-61-39-23-34-85-81,93-04-52,3-9-3","hash":"3f1ea03f5822e8021b60cc3e4b233181"},"notafter":"2026-06-25T17:36:29","notbefore":"2016-06-27T17:36:29","version":"TLS 1.2","sni":"host.domain.net","fingerprint":"36:3f:ee:2a:1c:fa:de:ad:be:ef:42:99:cf:a9:b0:91:01:eb:a9:cc","serial":"72:A9:2C:51","issuerdn":"C=Unknown, ST=Unknown, L=Unknown, O=Unknown, OU=Unknown, CN=Unknown","subject":"C=Unknown, ST=Unknown, L=Unknown, O=Unknown, OU=Unknown, CN=Unknown"},"alert":{"severity":3,"category":"","signature":"SURICATA TLS on unusual port","rev":1,"signature_id":2610003,"gid":1,"action":"allowed"},"proto":"TCP","dest_port":8443,"dest_ip":"10.128.2.48","src_port":64389,"src_ip":"10.137.3.54","event_type":"alert","in_iface":"enp0s31f6","flow_id":991192778198299,"timestamp":"2020-06-26T11:00:03.342282-0400"}

[elasticmachine]

Pinging @elastic/siem (Team:SIEM)

[AntonioMeireles]

XXL thanks for fixing this. btw, fwiw, it would by great to have this shipped already in upcoming 7.8.1 (i'm still using filebeat 7.6.2 to consume suricata logs due to this).

All the best,