ET HUNTING Suspicious Cisco Privilege Level 15 in HTTP Header (Outbound)

Query · suricata

flow:established,to_server;
http.header;
content:"|0d 0a|Priv-Level|3a 20|15|0d 0a|"; fast_pattern;
threshold:type limit,seconds 300,count 1,track by_src;
Raw source ET HUNTING Suspicious Cisco Privilege Level 15 in HTTP Header (Outbound) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET HUNTING Suspicious Cisco Privilege Level 15 in HTTP Header (Outbound)";
    flow:established,to_server;
    http.header;
    content:"|0d 0a|Priv-Level|3a 20|15|0d 0a|"; fast_pattern;
    threshold:type limit,seconds 300,count 1,track by_src;
    reference:url,blog.talosintelligence.com/active-exploitation-of-cisco-ios-xe-software/;
    reference:url,twitter.com/SI_FalconTeam/status/1718346358950711807;
    reference:cve,2023-20198;
    classtype:misc-activity;
    sid:2048937; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_10_30, cve CVE_2023_20198, deployment Perimeter, deployment SSLDecrypt, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_10_30, reviewed_at 2023_10_30;
)

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