alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET PHISHING Zimbra Phishing Landing on Appspot Hosting"; flow:established,to_client; flowbits:isset,ET.appspothosted; file.data; content:"<title>Zimbra Web Client Sign In"; fast_pattern; classtype:social-engineering; sid:2030869; rev:2; metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2020_09_14, deployment Perimeter, confidence Medium, signature_severity Minor, tag Phishing, updated_at 2020_09_14;)