ET ADWARE_PUP LNKR landing page (possible compromised site) M3

Query · suricata

flow:established,from_server;
http.stat_code;
content:"200";
file.data;
content:"/optout/set/lt?jsonp="; fast_pattern;
content:"key="; distance:16; within:27;
content:"cv="; distance:18; within:27;
content:"t="; distance:0;
Raw source ET ADWARE_PUP LNKR landing page (possible compromised site) M3 · 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 -> $HOME_NET any (
    msg:"ET ADWARE_PUP LNKR landing page (possible compromised site) M3";
    flow:established,from_server;
    http.stat_code;
    content:"200";
    file.data;
    content:"/optout/set/lt?jsonp="; fast_pattern;
    content:"key="; distance:16; within:27;
    content:"cv="; distance:18; within:27;
    content:"t="; distance:0;
    reference:url,securitytrails.com/blog/lnkr-malicious-browser-extension;
    classtype:pup-activity;
    sid:2027427; rev:5;
    metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2019_06_03, deployment Perimeter, performance_impact Low, confidence High, signature_severity Minor, updated_at 2020_10_30;
)

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