alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP OSX/Adware.Pirrit CnC Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".sh?do="; content:"&d="; content:"&inj="; content:"&cl="; content:"&cs="; content:"&id="; content:"&se="; http.header; content:"User-Agent|3a 20|Mozilla/5.0|0d 0a|"; fast_pattern; http.header_names; content:!"Referer|0d 0a|"; reference:url,go.cybereason.com/rs/996-YZT-709/images/Cybereason-Lab-Analysis-OSX-Pirrit-4-6-16.pdf; reference:md5,85846678ad4dbff608f2e51bb0589a16; classtype:pup-activity; sid:2022716; rev:6; metadata:created_at 2016_04_08, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_29;)