Versions (3)
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Rev: 1 • Nov 10, 2021, 12:00 PMET MALWARE Observed Cobalt Strike Related Domain (azurestat .app in TLS SNI)
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Cobalt Strike Related Domain (azurestat .app in TLS SNI)"; flow:established,to_server; tls.sni; content:"azurestat.app"; bsize:13; fast_pattern; reference:url,www.cert.ssi.gouv.fr/uploads/CERTFR-2021-CTI-009.pdf; classtype:domain-c2; sid:2034400; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_11_10, deployment Perimeter, malware_family Cobalt_Strike, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_11_10, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)
Nov 10, 2021, 12:00 PM
Nov 10, 2021, 12:00 PM
Sep 21, 2024, 3:00 AM
Sep 8, 2025, 9:34 PM
rules/emerging-malware.rules