Rule History

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Marbled Dust CnC Domain (wordinfos .com in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".wordinfos.com"; endswith; fast_pattern; reference:url,www.microsoft.com/en-us/security/blog/2025/05/12/marbled-dust-leverages-zero-day-in-output-messenger-for-regional-espionage/; classtype:trojan-activity; sid:2062300; rev:1; metadata:attack_target Client_Endpoint, created_at 2025_05_13, deployment Perimeter, confidence High, signature_severity Major, tag MarbledDust, tag AI_Generated_Description, updated_at 2025_05_13;)