Rule History

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Vidar Stealer Domain (reaitek .com in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".reaitek.com"; endswith; fast_pattern; reference:url,www.malwarebytes.com/blog/news/2025/07/steam-games-abused-to-deliver-malware-once-again; classtype:trojan-activity; sid:2063900; rev:1; metadata:attack_target Client_Endpoint, created_at 2025_08_04, deployment Perimeter, malware_family Vidar, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_08_04;)