alert http $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET PHISHING GOV UK Possible COVID-19 Phish 2020-04-06";
flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/Postcode.php?sslchannel="; fast_pattern;
content:"&sessionid="; distance:0;
http.request_body;
content:"postcode="; depth:9;
content:!"&"; distance:0;
classtype:credential-theft;
sid:2029849; rev:3;
metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2020_04_06, deployment Perimeter, confidence Medium, signature_severity Major, tag Phishing, updated_at 2020_11_12;
)