alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed ACR Stealer Domain (pddbj .xyz) in TLS SNI"; flow:established,to_server; tls.sni; bsize:9; content:"pddbj.xyz"; fast_pattern; reference:url,www.fortinet.com/blog/threat-research/exploiting-cve-2024-21412-stealer-campaign-unleashed; classtype:command-and-control; sid:2054838; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2024_08_01, deployment Perimeter, malware_family ACR_Stealer, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_10_04, reviewed_at 2024_10_04;)