Versions (3)
Version DetailsCurrent
Rev: 1 • Aug 25, 2021, 12:00 PMET MALWARE Observed Cobalt Strike CnC Domain (windowsupdatesc .com in TLS SNI)
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Cobalt Strike CnC Domain (windowsupdatesc .com in TLS SNI)"; flow:established,to_server; tls.sni; content:"windowsupdatesc.com"; bsize:19; fast_pattern; reference:url,thedfirreport.com/2021/08/16/trickbot-leads-up-to-fake-1password-installation/; classtype:domain-c2; sid:2033797; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_08_25, deployment Perimeter, malware_family Cobalt_Strike, confidence High, signature_severity Major, updated_at 2021_08_25, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1001, mitre_technique_name Data_Obfuscation;)
Aug 25, 2021, 12:00 PM
Aug 25, 2021, 12:00 PM
Sep 21, 2024, 3:00 AM
Sep 21, 2024, 3:00 AM
rules/emerging-malware.rules