alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET PHISHING BulletProofLink Phishkit Activity (POST)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/email-list/"; fast_pattern; content:".php"; endswith; reference:url,microsoft.com/security/blog/2021/09/21/catching-the-big-fish-analyzing-a-large-scale-phishing-as-a-service-operation/; classtype:credential-theft; sid:2034046; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_09_29, deployment Perimeter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_04_04, reviewed_at 2025_03_14;)