alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Rarog Stealer CnC Keep-Alive"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/check.php"; endswith; fast_pattern; http.request_body; content:"m="; depth:2; pcre:"/^m=[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}$/si"; http.header_names; content:!"Referer"; reference:md5,b38a63aea75bcf06fed11067cc75cc7e; classtype:command-and-control; sid:2025580; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_05_16, deployment Perimeter, malware_family Win32_Rarog, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2020_09_16;)