Versions (3)
Version DetailsCurrent
Rev: 1 • Oct 28, 2021, 12:00 PMET MALWARE Observed CloudAtlas APT Related Domain (checklicensekey .com in TLS SNI)
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed CloudAtlas APT Related Domain (checklicensekey .com in TLS SNI)"; flow:established,to_server; tls.sni; content:"checklicensekey.com"; bsize:19; fast_pattern; reference:url,twitter.com/h2jazi/status/1453748348964548617; reference:md5,1060678d61ea5152283be60df2472b6f; classtype:domain-c2; sid:2034282; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_10_28, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_10_28, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)
Oct 28, 2021, 12:00 PM
Oct 28, 2021, 12:00 PM
Sep 21, 2024, 3:00 AM
Sep 8, 2025, 9:34 PM
rules/emerging-malware.rules