Rule History

alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE [401TRG] Backdoor.BEACON SSL Cert Inbound (bigtopweb .com)"; flow:established,to_client; tls.cert_subject; content:"CN=bigtopweb.com"; bsize:16; fast_pattern; reference:url,symantec-enterprise-blogs.security.com/blogs/threat-intelligence/solarwinds-raindrop-malware; classtype:trojan-activity; sid:2031542; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_01_25, deployment Perimeter, confidence High, signature_severity Major, tag c2, updated_at 2021_01_25, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)