alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Alpha Stealer v1.5 PWS Exfil via HTTP"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php"; endswith; http.request_body; content:"Content-Disposition|3a 20|form-data|3b 20|name=|22|file|22 3b 20|filename=|22|"; pcre:"/^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[A-Za-z]+?/Rsi"; content:"Content-Type|3a 20|application/octet-stream|0d 0a|"; distance:0; content:"Screen.jpg"; distance:0; fast_pattern; http.header_names; content:!"Referer"; content:!"User-Agent"; reference:md5,a55bd3cc5caa47cb45355e9f79d4fc47; classtype:trojan-activity; sid:2027917; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_08_26, deployment Perimeter, malware_family Alpha_Stealer, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2020_09_17;)