alert tcp $EXTERNAL_NET any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET POLICY Successful LDAPSv3 LDAPS_START_TLS Request Outbound"; flow:established,to_client; flowbits:isset,ET.LDAPSBindRequest; stream_size:server,<,50; content:"|30 24 02 01|"; startswith; content:"|78 1f 0a 01 00 04 00 04 00 8a 16 31 2e 33 2e 36 2e 31 2e 34 2e 31 2e 31 34 36 36 2e 32 30 30 33 37|"; endswith; fast_pattern; reference:url,ldap.com/ldapv3-wire-protocol-reference-extended/; classtype:policy-violation; sid:2034720; rev:2; metadata:attack_target Client_and_Server, created_at 2021_12_14, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_12_15;)