ET ADWARE_PUP OSX/Adware.Pirrit CnC Activity 1

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"?mid="; fast_pattern;
pcre:"/\/(cld|update-effect)\?mid=[A-F0-9]{8}-[A-F0-9]{4}-[A-F0-9]{4}-[A-F0-9]{4}-[A-F0-9]{12}&(ct|st)=[a-z0-9]+$/i";
http.user_agent;
content:"curl/"; startswith;
http.header_names;
content:!"Referer|0d 0a|";
Raw source ET ADWARE_PUP OSX/Adware.Pirrit CnC Activity 1 · 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 -> $EXTERNAL_NET any (
    msg:"ET ADWARE_PUP OSX/Adware.Pirrit CnC Activity 1";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"?mid="; fast_pattern;
    pcre:"/\/(cld|update-effect)\?mid=[A-F0-9]{8}-[A-F0-9]{4}-[A-F0-9]{4}-[A-F0-9]{4}-[A-F0-9]{12}&(ct|st)=[a-z0-9]+$/i";
    http.user_agent;
    content:"curl/"; startswith;
    http.header_names;
    content:!"Referer|0d 0a|";
    reference:url,go.cybereason.com/rs/996-YZT-709/images/Cybereason-Lab-Analysis-OSX-Pirrit-4-6-16.pdf;
    reference:md5,85846678ad4dbff608f2e51bb0589a16;
    classtype:pup-activity;
    sid:2022717; rev:4;
    metadata:created_at 2016_04_08, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_31;
)

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