alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/TrojanDownloader.Delf.BXC CnC Beacon"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".php?cg="; fast_pattern; content:"&b="; distance:0; content:"&gt="; distance:0; http.header_names; content:!"Referer|0d 0a|"; reference:md5,d199b13d4676080073eaeb4e0ff39a75; reference:url,securelist.com/blog/research/76717/inpage-zero-day-exploit-used-to-attack-financial-institutions-in-asia/; classtype:command-and-control; sid:2023546; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2016_11_23, deployment Perimeter, malware_family Win32_TrojanDownloader_Delf_BXC, signature_severity Major, tag c2, updated_at 2020_08_03, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)