alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Clipsa Stealer - Exfiltration Activity"; flow:established,to_server; threshold:type limit, track by_src, count 1, seconds 30; http.method; content:"POST"; http.uri; content:"/wp-content/plugins/WPSecurity/up.php"; depth:37; fast_pattern; endswith; http.request_body; content:"Content-Disposition|3a 20|form-data|3b 20|name|3d 22|uploadfile|22 3b 20|filename|3d 22|"; content:".bin|22 0d 0a|Content-Type|3a 20|application/octet-stream|0d 0a|"; distance:18; within:47; http.content_type; content:"multipart/form-data|3b|"; reference:md5,7e52633ffa2c3aee03e8b26f03e07cc4; reference:url,decoded.avast.io/janrubin/clipsa-multipurpose-password-stealer/; classtype:trojan-activity; sid:2027895; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_08_16, deployment Perimeter, malware_family Clipsa, performance_impact Low, confidence High, signature_severity Major, tag Stealer, updated_at 2020_09_17;)