Rule History

alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE [Fireeye] Backdoor.SUNBURST SSL Cert Inbound (freescanonline .com)"; flow:established,to_client; tls.cert_subject; content:"CN=freescanonline.com"; bsize:21; fast_pattern; reference:url,www.fireeye.com/blog/threat-research/2020/12/evasive-attacker-leverages-solarwinds-supply-chain-compromises-with-sunburst-backdoor.html; classtype:trojan-activity; sid:2031343; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_12_14, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_12_15;)