Rule History

alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Malicious Cobalt Strike SSL Certificate (cloudflace-network .digital)"; flow:established,to_client; tls.cert_subject; content:"CN=cloudflace-network.digital"; bsize:29; fast_pattern; reference:url,www.cert.ssi.gouv.fr/cti/CERTFR-2021-CTI-009/; classtype:domain-c2; sid:2034356; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_11_08, deployment Perimeter, malware_family Cobalt_Strike, confidence Medium, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_11_08;)