alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET PHISHING Successful Zimbra Phish 2015-11-03"; flow:established,from_server; file_data; content:"<title>Thank You</title>"; fast_pattern; nocase; content:"enable us complete your security updates"; nocase; distance:0; content:"wrongly kindly click back"; nocase; distance:0; content:"resulting to the deactivation"; nocase; distance:0; classtype:credential-theft; sid:2031689; rev:3; metadata:attack_target Client_Endpoint, created_at 2015_11_03, deployment Perimeter, confidence Medium, signature_severity Critical, tag Phishing, updated_at 2022_03_17, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1566, mitre_technique_name Phishing;)