alert tls $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET JA3 Hash - Suspected Meterpreter Reverse Shell M1 (set)";
flow:established,to_server;
ja3.hash;
content:"8916410db85077a5460817142dcbc8de";
flowbits:set,ET.meterpreter.ja3;
flowbits:noalert;
classtype:command-and-control;
sid:2028828; rev:2;
metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_10_15, deployment Perimeter, malware_family Meterpreter, confidence Low, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_10_15;
)