alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/TrojanProxy.JpiProx.B CnC Beacon 1"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/sync"; depth:5; content:"/?ext="; within:7; fast_pattern; content:"&pid="; distance:0; http.header_names; content:!"Referer|0d 0a|"; reference:md5,aa9542f02b26a554650a9649d2239181; classtype:command-and-control; sid:2020737; rev:3; metadata:attack_target Client_Endpoint, created_at 2015_03_25, deployment Perimeter, malware_family Win32_TrojanProxy_JpiProx_B, signature_severity Major, tag c2, updated_at 2020_05_19, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)