ET INFO Server Responding to Microsoft Office HTTP Request for .html with JavaScript

Query · suricata

flow:established,to_client;
flowbits:isset,ET.MSFT.GET.HTML;
http.stat_code;
content:"200";
http.response_body;
content:"application/javascript"; fast_pattern;
target:dest_ip;

Rule dependencies

⚠ Higher-order rule. It fires on other rules' alerts, not on raw events, so it cannot fire on its own. Deploy the rules it depends on too.

Depends on

Raw source ET INFO Server Responding to Microsoft Office HTTP Request for .html with JavaScript · 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 any any -> $HOME_NET any (
#    msg:"ET INFO Server Responding to Microsoft Office HTTP Request for .html with JavaScript";
#    flow:established,to_client;
#    flowbits:isset,ET.MSFT.GET.HTML;
#    http.stat_code;
#    content:"200";
#    http.response_body;
#    content:"application/javascript"; fast_pattern;
#    classtype:misc-activity;
#    sid:2054243; rev:1;
#    metadata:attack_target Client_Endpoint, created_at 2024_07_03, deployment Perimeter, deployment Internal, performance_impact Significant, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_07_03, mitre_tactic_id TA0005, mitre_tactic_name Defense_Evasion, mitre_technique_id T1221, mitre_technique_name Template_Injection;
#    target:dest_ip;
#)

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