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hashes ie: file hashes #388

@neu5ron

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@neu5ron

Would like to discuss hashes, specifically the one that quickest comes to mind is file hashes.

I found some things with auditbeat that have md5, sha1, etc.
I am thinking that we could use hash as a nested similar to how Geo fields are being used.

File hashes would then be something like:

file.hash.md5
file.hash.sha1
file.hash.sha256

Going on something like x509/SSL/TLS certificates, would then be something like:

tls.certificate.hash.md5
tls.certificate.hash.sha1
tls.certificate.hash.sha256

Going on something like processes, example sysmon event id 1, would then be something like:

process.hash.md5
process.hash.sha1
process.hash.sha256
process.hash.imphash

This would then keep searching hashes across disparate log sources like:
*.hash.md5:60b725f10c9c85c70d97880dfe8191b3

Especially, if/when, start adding source and destination file when doing more things from Sysmon/endpoint/EDR.

Excuse me if I am missing an open issue, I performed some searches in this repo and didn't find much in the issues.

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