Versions (4)
Version DetailsCurrent
Rev: 1 • Apr 22, 2022, 12:00 PMET MALWARE BlackCat Ransomware Related Domain in TLS SNI (updatedaemon .com)
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE BlackCat Ransomware Related Domain in TLS SNI (updatedaemon .com)"; flow:established,to_server; tls.sni; content:"updatedaemon.com"; startswith; fast_pattern; reference:md5,e76fd61eea3bf2073d29c6aa963bc34b; reference:url,www.trendmicro.com/en_us/research/22/d/an-investigation-of-the-blackcat-ransomware.html; classtype:domain-c2; sid:2036312; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_04_22, deployment Perimeter, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_04_22, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)
Apr 22, 2022, 12:00 PM
Apr 22, 2022, 12:00 PM
Sep 21, 2024, 3:00 AM
Sep 3, 2025, 8:34 PM
rules/emerging-malware.rules