alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET JA3 Hash - Possible RustyBuer Client Activity"; flowbits:set,ET.rustybuer; flowbits:noalert; ja3.hash; content:"6cc312d5b10bcbc97c4619603a24131b"; reference:md5,ea98a9d6ca6f5b2a0820303a1d327593; classtype:bad-unknown; sid:2032959; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_05_13, deployment Perimeter, malware_family RustyBuer, performance_impact Low, confidence Low, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_05_13;)