alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET INFO Observed OpenDrive Cloud Storage SSL Cert"; flow:established,to_client; tls.cert_subject; bsize:47; content:"OU=Domain Control Validated, CN=*.opendrive.com"; fast_pattern; classtype:bad-unknown; sid:2044644; rev:2; metadata:attack_target Client_Endpoint, created_at 2023_03_16, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_26, reviewed_at 2023_10_23;)