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How to extract a alphanumeric values with special characters

av_
Path Finder

I want to extract Sample ID field value
"Sample ID":"020ab888-a7ce-4e25-z8h8-a658bf21ech9"

Labels (1)
0 Karma

yuanliu
SplunkTrust
SplunkTrust

Additionally, the format looks too much like part of JSON.  If part or the whole of your event is JSON, you should treat it as structured data, not isolated strings.  Can you share the raw event? (Anonymize as needed.)

richgalloway
SplunkTrust
SplunkTrust

What you need is everything between the quotation marks.  Try this

| rex "Sample ID\\\":\\\"(?<SampleID>[^\"]+)"
---
If this reply helps you, Karma would be appreciated.
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