alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP W32/PullUpdate.Adware CnC Beacon"; flow:established,to_server; urilen:7; http.method; content:"POST"; http.uri; content:"?v="; fast_pattern; pcre:"/^\/[a-z]{2}\x3Fv\x3D[0-9]$/"; http.header_names; content:!"Referer"; content:!"Accept"; content:!"User-Agent"; reference:md5,129563c2ab034af094422db408d7d74f; classtype:pup-activity; sid:2018368; rev:7; metadata:attack_target Client_Endpoint, created_at 2014_04_07, deployment Perimeter, signature_severity Minor, tag c2, updated_at 2020_08_31, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)