alert http any any -> any any (msg:"ET WEB_SERVER Babydraco WebShell Activity"; flow:established,to_server; http.uri; content:"/owa/auth/babydraco.aspx"; bsize:24; fast_pattern; reference:url,krebsonsecurity.com/2021/03/no-i-did-not-hack-your-ms-exchange-server/; classtype:attempted-admin; sid:2032344; rev:1; metadata:created_at 2021_03_29, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_03_29, reviewed_at 2023_12_01;)