alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET RETIRED Red Wolf/RedCurl Implant Checkin"; flow:established,to_server; pcre:"/Content-[Tt]ype\x3a\x20/H"; http.method; content:"POST"; http.uri; content:"/"; http.content_type; content:"application/x-www-form-urlencoded"; http.request_body; content:"Lg0KLi4NC"; fast_pattern; pcre:"/(ZGVza3RvcC5pbm|Rlc2t0b3AuaW5p|kZXNrdG9wLmlua)/R"; reference:md5,b7a633613d95dedd57775dcbb72accc7; 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:2047961; rev:2; 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, former_category MALWARE, performance_impact Low, confidence High, signature_severity Major, tag Red_Wolf, tag RedCurl, updated_at 2025_04_17, reviewed_at 2025_04_17; target:src_ip;)