alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Proyecto RAT Variant - Yopmail Stage 2 CnC Retrieval"; flow:established,from_server; flowbits:isset,ET.Proyecto.YopmailLogin; http.stat_code; content:"200"; http.response_body; content:"|3c|span class|3d 22|lms|22 3e c2 a1|"; fast_pattern; content:"|c2 a1|</span>"; within:30; reference:md5,295d31fd532ed0257149b191146b5236; reference:url,blog.trendmicro.com/trendlabs-security-intelligence/spam-campaign-targets-colombian-entities-with-custom-proyecto-rat-email-service-yopmail-for-cc/; classtype:command-and-control; sid:2027735; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_07_19, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag RAT, updated_at 2020_08_31;)