alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Proyecto RAT Variant - Yopmail Login attempt (set)"; flow:established,to_server; flowbits:set,ET.Proyecto.YopmailLogin; flowbits:noalert; http.method; content:"GET"; http.uri; content:"/es/inbox.php?login="; content:"&p="; content:"&d=&ctrl=&scrl=&spam=true&yf="; distance:1; within:29; fast_pattern; http.host; content:"www.yopmail.com"; http.header_names; content:!"|0d 0a|Referer|0d 0a|"; 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:trojan-activity; sid:2027734; 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;)