alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/FireStealer Related Activity M2 (POST)"; flow:established,to_server; urilen:1; http.method; content:"POST"; http.content_type; content:"application/json"; bsize:16; http.header_names; content:!"Referer|0d 0a|"; http.request_body; content:"|7b 22|name|22 3a 22|"; depth:24; content:"|22 2c 22|title|22 3a 22|grabg|3a 3a|"; distance:0; fast_pattern; reference:md5,03f80949b6a0d5148c4e0d0557175131; classtype:trojan-activity; sid:2051908; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, tls_state plaintext, created_at 2024_04_03, deployment Perimeter, malware_family Win32_FireStealer, performance_impact Low, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_03; target:src_ip;)