ET WEB_SPECIFIC_APPS Apache Struts inbound .getWriter OGNL injection remote code execution attempt

Query · suricata

flow:to_server,established;
http.uri;
content:"${";
content:".getWriter"; fast_pattern; distance:0;
Raw source ET WEB_SPECIFIC_APPS Apache Struts inbound .getWriter OGNL injection remote code execution attempt · Suricata
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Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HTTP_SERVERS any (
    msg:"ET WEB_SPECIFIC_APPS Apache Struts inbound .getWriter OGNL injection remote code execution attempt";
    flow:to_server,established;
    http.uri;
    content:"${";
    content:".getWriter"; fast_pattern; distance:0;
    reference:cve,2018-11776;
    classtype:attempted-admin;
    sid:2026032; rev:2;
    metadata:affected_product Apache_Struts2, attack_target Server, created_at 2018_08_24, cve CVE_2018_11776, deployment Datacenter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_25, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
)

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