alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET RETIRED Win32/Speedbit Variant Checkin"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".ashx?"; content:"pid="; content:"aid="; content:"mid="; fast_pattern; pcre:"/^[a-f0-9]{8}-[a-f0-9]{12}/Ri"; content:"shver="; content:"uid="; pcre:"/^[A-F0-9]{8}-(?:[A-F0-9]{4}-){3}[A-F0-9]{12}/Ri"; content:"rcnt="; content:"instd="; content:"subinst="; http.header_names; content:!"Referer"; http.request_body; content:"d="; startswith; reference:md5,1b74381a8834b161743c8b1b36e3ee29; classtype:pup-activity; sid:2038704; rev:2; metadata:attack_target Client_Endpoint, created_at 2022_08_31, deployment Perimeter, former_category ADWARE_PUP, performance_impact Low, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_09_17, reviewed_at 2024_09_17;)