ET WEB_SERVER base64_decode in UA

Query · suricata

flow:established,to_server;
http.user_agent;
content:"base64_decode("; nocase; fast_pattern;
Raw source ET WEB_SERVER base64_decode in UA · Suricata
Esc
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_SERVER base64_decode in UA";
    flow:established,to_server;
    http.user_agent;
    content:"base64_decode("; nocase; fast_pattern;
    reference:url,blog.spiderlabs.com/2013/02/honeypot-alert-user-agent-field-php-injection-attacks.html;
    classtype:bad-unknown;
    sid:2016416; rev:5;
    metadata:created_at 2013_02_16, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_18;
)

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.