alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Observed Malicious SSL Cert (TA577)"; flow:established,to_client; tls.cert_subject; bsize:114; content:"C=DE, ST=TR, O=Palmatilobate, OU=Underhorseman Majlis, L=Slugfest Wyvern, CN=isoimmunizationisothiocyanates.garden"; fast_pattern; reference:url,twitter.com/reecdeep/status/1735649391447302362; classtype:trojan-activity; sid:2049712; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_12_15, deployment Perimeter, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag TA577, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_12_15;)