alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Possible Upatre SSL Cert twitterbacklinks.com"; flow:established,to_client; tls.cert_subject; content:"CN=www.twitterbacklinks.com"; reference:md5,4cb5a748416b9f03d875245437344177; classtype:trojan-activity; sid:2018758; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2014_07_23, deployment Perimeter, malware_family Upatre, confidence Medium, signature_severity Critical, tag SSL_Malicious_Cert, tag Exploit_Kit, tag Downloader, tag Upatre, updated_at 2024_04_12;)