Versions (4)
Version DetailsCurrent
Rev: 1 • Apr 22, 2022, 12:00 PMET MALWARE Observed BlackCat Ransomware Related SSL Cert (updatedaemon .com)
alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Observed BlackCat Ransomware Related SSL Cert (updatedaemon .com)"; flow:established,to_client; tls.cert_subject; content:"CN=updatedaemon.com"; bsize:19; 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:2036314; 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 TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)
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