alert http $EXTERNAL_NET any -> $HTTP_SERVERS any (msg:"ET WEB_SERVER ASP.NET Forms Authentication Bypass"; flow:to_server,established; content:"CreateUserStepContainer"; content:"UserName="; distance:0; content:"%00"; distance:0; pcre:"/UserName\x3d[^\x26]+\x2500/"; http.uri; content:"/CreatingUserAccounts.aspx"; reference:cve,2011-3416; classtype:attempted-user; sid:2014100; rev:5; metadata:created_at 2012_01_03, cve CVE_2011_3416, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_11_26, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)