ET SCADA Rockwell RNA Message Large Header Length - 8Kb

Query · suricata

flow:established,to_server;
content:"rna|f2|"; startswith; fast_pattern;
byte_test:4,>,0x2000,0,relative,little;
target:dest_ip;
Raw source ET SCADA Rockwell RNA Message Large Header Length - 8Kb · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp any !443 -> $HOME_NET [1330,1331,1332,4241,4242,4445,4446,5241,6543,9111,60093,49281] (
    msg:"ET SCADA Rockwell RNA Message Large Header Length - 8Kb";
    flow:established,to_server;
    content:"rna|f2|"; startswith; fast_pattern;
    byte_test:4,>,0x2000,0,relative,little;
    classtype:attempted-dos;
    sid:2049795; rev:5;
    metadata:attack_target ICS, created_at 2011_09_30, cve CVE_2011_3489, deployment Internal, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_12_27, reviewed_at 2024_03_06, former_sid 2803783;
    target:dest_ip;
)

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