Rule History

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed ClickFix Domain (flynews .us in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".flynews.us"; endswith; fast_pattern; reference:url,www.proofpoint.com/us/blog/threat-insight/clipboard-compromise-powershell-self-pwn; reference:url,infosec.exchange/@monitorsg/112649297464424337; classtype:trojan-activity; sid:2053773; rev:2; metadata:attack_target Client_Endpoint, created_at 2024_06_20, deployment Perimeter, deprecation_reason Relevance, malware_family ClickFix, confidence High, signature_severity Major, tag compromised_website, updated_at 2025_04_21, reviewed_at 2025_04_21, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)