alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE BackSwap Trojan C2 Domain Observed (debasuin .nl in TLS SNI)"; flow:established,to_server; tls.sni; content:"debasuin.nl"; endswith; nocase; reference:url,www.cert.pl/en/news/single/backswap-malware-analysis; classtype:command-and-control; sid:2025597; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_06_20, deployment Perimeter, malware_family Banking_Trojan, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_16, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)