alert tcp $EXTERNAL_NET any -> $HOME_NET $HTTP_PORTS (msg:"ET WEB_SPECIFIC_APPS phpBB3 registration (Step4 POST)"; flow:to_server,established; content:"POST "; depth:5; nocase; content:"/ucp.php"; http_uri; nocase; content:"mode=register"; http_uri; content:"username="; content:"email="; content:"email_confirm="; content:"new_password"; content:"password_confirm"; content:"lang="; content:"tz="; content:"confirm_code="; content:"refresh_vc="; content:"confirm_id="; content:"agreed="; content:"change_lang="; content:"confirm_id="; content:"creation_time="; content:"form_token="; flowbits:set,ET.phpBB3_test; flowbits:isset,ET.phpBB3_register_stage3; flowbits:set,ET.phpBB3_register_stage4; flowbits:noalert; classtype:attempted-user; sid:2010893; rev:3; metadata:created_at 2010_07_30, signature_severity Major, updated_at 2019_08_22;)