This file is indexed.

/etc/suricata/rules/app-layer-events.rules is in suricata 3.2-2ubuntu3.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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# App layer event  rules
#
# SID's fall in the 2260000+ range. See http://doc.emergingthreats.net/bin/view/Main/SidAllocation
#
# These sigs fire at most once per connection.
#
# A flowint applayer.anomaly.count is incremented for each match. By default it will be 0.
#
alert ip any any -> any any (msg:"SURICATA Applayer Mismatch protocol both directions"; flow:established; app-layer-event:applayer_mismatch_protocol_both_directions; flowint:applayer.anomaly.count,+,1; classtype:protocol-command-decode; sid:2260000; rev:1;)
alert ip any any -> any any (msg:"SURICATA Applayer Wrong direction first Data"; flow:established; app-layer-event:applayer_wrong_direction_first_data; flowint:applayer.anomaly.count,+,1; classtype:protocol-command-decode; sid:2260001; rev:1;)
alert ip any any -> any any (msg:"SURICATA Applayer Detect protocol only one direction"; flow:established; app-layer-event:applayer_detect_protocol_only_one_direction; flowint:applayer.anomaly.count,+,1; classtype:protocol-command-decode; sid:2260002; rev:1;)
alert ip any any -> any any (msg:"SURICATA Applayer Protocol detection skipped"; flow:established; app-layer-event:applayer_proto_detection_skipped; flowint:applayer.anomaly.count,+,1; classtype:protocol-command-decode; sid:2260003; rev:1;)

#next sid is 2260004