alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET ADWARE_PUP LNKR landing page (possible compromised site) M2"; flow:established,from_server; http.stat_code; content:"200"; file.data; content:"/addons/lnkr30_nt.min.js"; fast_pattern; reference:url,securitytrails.com/blog/lnkr-malicious-browser-extension; classtype:pup-activity; sid:2027426; 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;)