alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP OSX/Adware.Pirrit CnC Activity 3"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/rl?tm="; content:"&id="; content:"&cu="; content:"&ci="; content:"&cv="; content:"&iv="; content:"&pchid="; content:"&ug="; http.header_names; content:!"Referer|0d 0a|"; reference:url,www.cybereason.com/blog/targetingedge-mac-os-x-pirrit-malware-adware-still-active; classtype:pup-activity; sid:2033028; rev:1; metadata:affected_product Mac_OSX, attack_target Client_Endpoint, created_at 2021_05_25, deployment Perimeter, performance_impact Low, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_05_25;)