alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE W32/Bilakip.A Downloader API Ping CnC Beacon"; flow:established,to_server; http.uri; content:"/api/ping?stage="; content:"&uid="; reference:url,about-threats.trendmicro.com/Malware.aspx?id=50100&name=TROJ_DLOADR.BKM&language=au; classtype:command-and-control; sid:2016273; rev:3; metadata:attack_target Client_Endpoint, created_at 2013_01_25, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_04_23, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)