alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE X-Files Stealer CnC Exfil Activity M1"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/log.php"; endswith; http.request_body; content:"form-data|3b 20|name=userfile|3b 20|filename="; content:"Stealer|5c|"; distance:0; fast_pattern; reference:md5,b572ed0bf3030cbb18d8af16e2c7e2c2; classtype:trojan-activity; sid:2032333; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_03_26, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_03_26;)