alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET RETIRED Bluebox Data Exfiltration"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/?ver="; fast_pattern; content:"corp="; content:"os="; content:"softid="; content:"hid="; content:"macadd="; content:"md5="; content:"rand="; content:"subid="; http.user_agent; content:"IEhook"; http.header_names; content:!"Referer|0d 0a|"; reference:md5,b13718f353c8c0ea51a15733e035199e; classtype:pup-activity; sid:2036236; rev:3; metadata:attack_target Client_Endpoint, created_at 2022_04_15, deployment Perimeter, former_category ADWARE_PUP, performance_impact Low, confidence Medium, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_09_12, reviewed_at 2024_09_12;)