Rule History

alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Likely Dridex SSL Cert"; flow:established,to_client; tls.cert_subject; content:"O=clan"; content:"OU=bushes"; fast_pattern; reference:md5,a5f7d314e2b996b69751a4e46503c644; classtype:trojan-activity; sid:2021518; rev:3; metadata:attack_target Client_Endpoint, created_at 2015_07_23, deployment Perimeter, confidence Medium, signature_severity Major, tag SSL_Malicious_Cert, updated_at 2024_04_23;)