alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE ServHelper RAT CnC Domain Observed in SNI"; flow:established,to_server; tls.sni; content:"arhidsfderm.pw"; endswith; nocase; reference:md5,43e7274b6d42aef8ceae298b67927aec; classtype:command-and-control; sid:2026768; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_11_13, deployment Perimeter, malware_family ServHelper, performance_impact Low, confidence High, signature_severity Major, tag RAT, updated_at 2020_09_16;)