ET ADWARE_PUP LNKR CnC Activity M1

Query · suricata

flow:established,to_server;
threshold:type limit, track by_dst, count 1, seconds 120;
http.method;
content:"GET";
http.uri;
content:"/optout/set/"; depth:12; fast_pattern;
content:"?jsonp="; within:20;
content:"&key="; distance:16; within:23;
content:"&cv="; distance:18; within:23;
content:"&t="; distance:0;
Raw source ET ADWARE_PUP LNKR CnC Activity M1 · 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 any -> $EXTERNAL_NET any (
    msg:"ET ADWARE_PUP LNKR CnC Activity M1";
    flow:established,to_server;
    threshold:type limit, track by_dst, count 1, seconds 120;
    http.method;
    content:"GET";
    http.uri;
    content:"/optout/set/"; depth:12; fast_pattern;
    content:"?jsonp="; within:20;
    content:"&key="; distance:16; within:23;
    content:"&cv="; distance:18; within:23;
    content:"&t="; distance:0;
    reference:url,securitytrails.com/blog/lnkr-malicious-browser-extension;
    classtype:pup-activity;
    sid:2027419; rev:5;
    metadata:affected_product Web_Browsers, affected_product Web_Browser_Plugins, attack_target Client_Endpoint, created_at 2019_06_03, deployment Perimeter, performance_impact Low, confidence High, signature_severity Minor, updated_at 2020_11_19;
)

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