Rule History

alert tls $EXTERNAL_NET 443 -> $HOME_NET any (msg:"ET MALWARE CozyDuke APT Possible SSL Cert 2"; flow:established,to_client; tls.cert_subject; content:"C=--"; startswith; content:"ST=SomeState"; distance:0; tls.cert_serial; content:"65:5d"; depth:5; fast_pattern; reference:url,securelist.com/blog/69731/the-cozyduke-apt/; reference:md5,859f167704b5c138ed9a9d4d3fdc0723; classtype:targeted-activity; sid:2020967; rev:4; metadata:attack_target Client_Endpoint, created_at 2015_04_22, deployment Perimeter, confidence Medium, signature_severity Major, tag SSL_Malicious_Cert, updated_at 2024_04_01;)