ET MALWARE Win32/TrojanProxy.JpiProx.B CnC Beacon 1

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;
)