alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET RETIRED Red Wolf/RedCurl Payload Retrieval Attempt M5"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/ldn"; startswith; fast_pattern; http.header; content:"Content-type"; http.content_type; content:"application/x-www-form-urlencoded"; http.user_agent; content:"Mozilla/5.0"; startswith; content:"WindowsPowerShell/"; distance:0; http.content_len; byte_test:0,=,0,0,string,dec; 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:2047959; rev:2; metadata:created_at 2023_09_07, former_category MALWARE, confidence High, signature_severity Major, tag Red_Wolf, tag RedCurl, updated_at 2025_04_17, reviewed_at 2025_04_17;)