Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Scarsi Variant CnC Activity"; flow:to_server,established; http.uri; content:"/WP"; content:".php"; within:50; endswith; pcre:"/\/WP(?:Security|CoreLog)\/(?:data\/)?\w+\.php$/i"; http.header; content:"Content-Length|3a 20|"; byte_test:1,>,0x30,0,relative; http.request_body; pcre:"/^[\x20-\x25\x27-\x3c\x3e-\x7e]{25,}$/si"; http.content_type; content:"application/x-www-form-urlencoded|3b 20|Charset=UTF-8"; fast_pattern; bsize:48; http.header_names; content:!"Referer|0d 0a|"; reference:md5,52c193a7994a6bb55ec85addc8987c10; classtype:command-and-control; sid:2024758; rev:8; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_09_21, deployment Perimeter, malware_family Win32_Scarsi, performance_impact Low, confidence High, signature_severity Major, updated_at 2020_11_19;)