alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET ADWARE_PUP LNKR Possible Response for LNKR js file"; flow:established,from_server; http.stat_code; content:"200"; http.content_type; content:"application/javascript"; file.data; content:"lnkr_redirecting"; fast_pattern; content:"_lnkr"; content:"excludeDomains"; within:40; content:"document.createElement|28 22|script|22|"; distance:0; reference:url,securitytrails.com/blog/lnkr-malicious-browser-extension; classtype:pup-activity; sid:2027424; rev:6; 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 Medium, signature_severity Minor, updated_at 2020_11_19;)