alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Red Wolf/RedCurl Payload Retrieval Attempt M4"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/dn01"; fast_pattern; http.user_agent; content:"Mozilla/5.0"; startswith; content:"WindowsPowerShell/"; distance:0; http.connection; content:"Keep-Alive"; reference:md5,6ece95df231083c37ecf9a39c324e2bb; reference:url,bi.zone/eng/expertise/blog/red-wolf-vnov-shpionit-za-kommercheskimi-organizatsiyami/; reference:url,www.facct.ru/blog/redcurl-2023/; classtype:trojan-activity; sid:2047958; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2023_09_07, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, tag Red_Wolf, tag RedCurl, updated_at 2023_09_08, reviewed_at 2023_09_07; target:src_ip;)