ET HUNTING Suspicious Purported MSIE 7 with terse HTTP Headers GET to PHP

Query · suricata

flow:established,to_server;
http.uri;
content:".php"; nocase;
http.user_agent;
content:"Mozilla/4.0 (compatible|3b 20|MSIE 7.0|3b 20|Windows NT 5.1)"; depth:50; endswith; fast_pattern;
http.protocol;
content:"HTTP/1.1";
http.header_names;
content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a|"; depth:20;
content:"Cache-Control|0d 0a 0d 0a|"; distance:0;
Raw source ET HUNTING Suspicious Purported MSIE 7 with terse HTTP Headers GET to PHP · 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 Purported MSIE 7 with terse HTTP Headers GET to PHP";
    flow:established,to_server;
    http.uri;
    content:".php"; nocase;
    http.user_agent;
    content:"Mozilla/4.0 (compatible|3b 20|MSIE 7.0|3b 20|Windows NT 5.1)"; depth:50; endswith; fast_pattern;
    http.protocol;
    content:"HTTP/1.1";
    http.header_names;
    content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a|"; depth:20;
    content:"Cache-Control|0d 0a 0d 0a|"; distance:0;
    classtype:bad-unknown;
    sid:2012384; rev:7;
    metadata:created_at 2011_02_27, performance_impact Moderate, confidence Medium, signature_severity Unknown, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_10;
)

Detection rules belong to the projects that publish them and remain under their own licenses. This site indexes and links to them; it claims no rights in them.