alert tcp-pkt any any -> $HOME_NET any (msg:"ET INFO Apache Spark RPC - CheckExistence Request (set)"; flow:established,to_server; flowbits:isnotset,ET.ApacheSpark_CE; flowbits:set,ET.ApacheSpark_CE; flowbits:noalert; content:"endpoint-verifier"; fast_pattern; content:"CheckExistence"; distance:0; classtype:not-suspicious; sid:2035001; rev:3; metadata:attack_target Server, created_at 2022_01_28, deployment Internal, deployment Datacenter, confidence High, signature_severity Informational, updated_at 2024_03_14;)