alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Observed Malicious SSL Cert (Bazar Backdoor)"; flow:established,to_client; tls.cert_subject; content:"C=--, ST=SomeState, L=SomeCity, O=SomeOrganization, OU=SomeOrganizationalUnit, CN=mail.paolemahta.icu"; content:"root@mail.paolemahta.icu"; fast_pattern; reference:md5,4fd5867c45716f0a25c74f3510984cf2; reference:url,twitter.com/bryceabdo/status/1300787997755891712; classtype:domain-c2; sid:2030820; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2020_09_01, deployment Perimeter, malware_family Bazar, performance_impact Low, confidence High, signature_severity Major, tag SSL_Malicious_Cert, updated_at 2025_07_24, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)