Rule History

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed BOUNCEBEAM Backdoor CnC Domain (cloudflare .5156game .com in TLS SNI)"; flow:established,to_server; tls.sni; content:"cloudflare.5156game.com"; bsize:23; fast_pattern; reference:url,twitter.com/ESETresearch/status/1415542465176735748; reference:md5,429914c2cf45355ca4baa95a1dcdffab; reference:md5,bded44bf177a52a9ffbd13d077f8747d; reference:md5,19b8681e4dd4f9698ec324606a642dd6; classtype:command-and-control; sid:2033390; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_07_22, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_07_22, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)