alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE VersaMem Webshell Authentication Attempt M3"; flow:established,to_server; http.header_names; content:"|0d 0a|Versa-Auth|0d 0a|"; fast_pattern; reference:url,blog.lumen.com/taking-the-crossroads-the-versa-director-zero-day-exploitation/; classtype:trojan-activity; sid:2055538; rev:1; metadata:attack_target Server, tls_state TLSDecrypt, created_at 2024_08_27, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_08_27; target:dest_ip;)