alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT RealVNC Authentication Bypass Attempt"; flowbits:isset,BSvnc.auth.offered; flow:established; dsize:1; content:"|01|"; depth:1; flowbits:set,BSvnc.null.auth.sent; reference:url,secunia.com/advisories/20107/; reference:url,archives.neohapsis.com/archives/fulldisclosure/2006-05/0356.html; reference:cve,2006-2369; classtype:attempted-admin; sid:2002916; rev:7; metadata:created_at 2010_07_30, 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;)