you're right. I am trying to extract fields from JSON-data. I used botsv2 data, in "stream:smtp" sourcetype. This is my _raw data(I try to search index="botsv2" sourcetype="stream:smtp"). The _raw data result. {"endtime":"2017-08-31T22:56:56.070751Z","timestamp":"2017-08-31T22:56:56.070751Z","ack_packets_in":0,"ack_packets_out":0,"bytes":72,"bytes_in":0,"bytes_out":72,"capture_hostname":"matar","client_rtt":0,"client_rtt_packets":0,"client_rtt_sum":0,"data_packets_in":0,"data_packets_out":1,"dest_ip":"172.31.38.181","dest_mac":"06:6A:51:FA:0A:B0","dest_port":25,"duplicate_packets_in":0,"duplicate_packets_out":0,"flow_id":"b6b9eb1b-e8e1-4cec-ab3c-f7223adc490a","greeting":"ip-172-31-38-181.us-west-2.compute.internal ESMTP Postfix (Ubuntu)","missing_packets_in":0,"missing_packets_out":0,"network_interface":"eth0","packets_in":0,"packets_out":1,"protocol_stack":"ip:tcp:smtp","reply_time":0,"request_ack_time":0,"request_time":0,"response_ack_time":24624,"response_code":220,"response_time":0,"sender_server":"ip-172-31-38-181.us-west-2.compute.internal","server_agent":"ESMTP Postfix (Ubuntu)","server_response":"220 ip-172-31-38-181.us-west-2.compute.internal ESMTP Postfix (Ubuntu)","server_rtt":0,"server_rtt_packets":0,"server_rtt_sum":0,"src_ip":"104.47.34.68","src_mac":"06:E3:CC:18:AA:33","src_port":37952,"time_taken":0,"transport":"tcp"} I have one more question. The raw data results I searched with index=botsv2 sourcetype="stream:smtp" and Why are the search results with index="botsv2" sourcetype="stream:smtp" attach_filename{}="*" different? The field I want to extract exists in the search results with index="botsv2" sourcetype="stream:smtp" attach_filename{}="*". Search Try: index="botsv2" sourcetype="stream:smtp" attach_filename{}="*" {"endtime":"2017-08-30T15:08:00.075698Z","timestamp":"2017-08-30T15:07:59.774655Z","ack_packets_in":0,"ack_packets_out":31,"attach_disposition":["attachment"],"attach_filename":["Saccharomyces_cerevisiae_patent.docx"],"attach_size":[142540],"attach_size_decoded":[104162],"attach_transfer_encoding":["base64"],"attach_type":["application/vnd.openxmlformats-officedocument.wordprocessingml.document"],"bytes":155976,"bytes_in":155939,"bytes_out":37,"capture_hostname":"matar","client_rtt":0,"client_rtt_packets":0,"client_rtt_sum":0,"content":["DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;\r\n d=jacobsmythe111.onmicrosoft.com; s=selector1-froth-ly;\r\n h=From:Date:Subject:Message-ID:Content-Type:MIME-Version;
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