ET PHISHING Ferest Smuggler Request M2

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET PHISHING Ferest Smuggler Request M2";
    flow:established,to_server;
    http.uri;
    content:"?";
    content:"&pid="; distance:64; within:5;
    content:"&encoding"; distance:64; within:9;
    content:"="; distance:32; within:1;
    content:"&username="; distance:64; within:10;
    content:"&unsubscribe="; distance:0;
    content:"&pathOWA="; distance:32; within:9;
    content:"-mail"; endswith; distance:32; within:5; fast_pattern;
    pcre:"/\?(?P<variable>[a-f0-9]{32})(?P=variable)\&pid=(?P=variable){2}&encoding(?P=variable)=(?P=variable){2}&username=(?:[A-Za-z0-9+\/]{4})*(?:[A-Za-z0-9+\/]{4}|[A-Za-z0-9+\/]{3}=|[A-Za-z0-9+\/]{2}={2})\&unsubscribe=(?P=variable)\&pathOWA=(?P=variable)-mail$/";
    reference:url,medium.com/@thrunter/cyberuptive-identifies-and-disrupts-ferest-smuggler-a-mass-credential-harvesting-campaign-22875c563854;
    classtype:credential-theft;
    sid:2047706; rev:1;
    metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2023_08_23, deployment Perimeter, deployment SSLDecrypt, malware_family Ferest_Smuggler, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_08_23, reviewed_at 2023_08_23;
    target:src_ip;
)