ET ATTACK_RESPONSE Possible arp command output via HTTP (Windows Style)

Query · suricata

flow:established,to_client;
http.response_body;
content:!"<html";
content:"Interface|3a 20|";
content:"|20 2d 2d 2d 20|0x";
content:"|0d 0a|"; distance:1; within:2;
content:"Internet|20|Address"; within:100;
content:"Physical|20|Address"; fast_pattern; within:100;
Raw source ET ATTACK_RESPONSE Possible arp command output via HTTP (Windows Style) · 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 [$HOME_NET,$HTTP_SERVERS] any -> $EXTERNAL_NET any (
    msg:"ET ATTACK_RESPONSE Possible arp command output via HTTP (Windows Style)";
    flow:established,to_client;
    http.response_body;
    content:!"<html";
    content:"Interface|3a 20|";
    content:"|20 2d 2d 2d 20|0x";
    content:"|0d 0a|"; distance:1; within:2;
    content:"Internet|20|Address"; within:100;
    content:"Physical|20|Address"; fast_pattern; within:100;
    classtype:successful-recon-limited;
    sid:2049392; rev:1;
    metadata:attack_target Server, created_at 2023_11_29, deployment Perimeter, performance_impact Low, confidence Low, signature_severity Major, tag WebShell, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_11_29, mitre_tactic_id TA0003, mitre_tactic_name Persistence, mitre_technique_id T1505, mitre_technique_name Server_Software_Component;
)

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