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[Feature request] Add prefix to enriched fields #244

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ari-wein opened this issue Jan 10, 2025 · 6 comments · Fixed by #245
Closed

[Feature request] Add prefix to enriched fields #244

ari-wein opened this issue Jan 10, 2025 · 6 comments · Fixed by #245

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@ari-wein
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Can a feature be added where all enrichment keys that are added by laurel are prepended by a string that the user sets in the config?
For example, when the uid is resolved and added as UID, you would have the option as adding it as L_UID.
The reason is that the SIEM that im using doesn't differentiate between case, so uid and UID are the same, and one gets dropped.
This should apply to all fields that are added by laurel to the log.
@ari-wein ari-wein changed the title [Feature request] Add prefix to enhanced fields [Feature request] Add prefix to enriched fields Jan 10, 2025
@hillu
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hillu commented Jan 13, 2025

Interesting. What kind of SIEM are you using that does not properly understand JSON objects?

This one is going to be a bit messy because this means that laurel should also rewrite enriched fields (SYSCALL, ARCH, *UID, *GID) that have been created by auditd.

@ari-wein
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The SIEM is Wazuh.
If you take a look at my fork, you can see the job that AI did. I cant code in rust, so I don't actually know what it did, but if it provides any help at all, feel free to steal it. It got it working to add the prefix, but labels are not propagating down the process tree correctly.

@hillu
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hillu commented Jan 13, 2025

@ari-wein I don't see a LAUREL fork under your account.

@ari-wein
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https://github.com/ari-wein/laurel

hillu added a commit to hillu/laurel that referenced this issue Jan 14, 2025
@hillu
Add option to prefix enriched fields instead of capitalizing them
045951c 
This seems useful for mis-designed log analysis software that treats
JSNO object keys as case-insensitive.

Close threathunters-io#244
@hillu hillu mentioned this issue Jan 14, 2025
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@hillu
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hillu commented Jan 14, 2025

@ari-wein I decided that dealing with already-enriched fields coming from auditd is not worth the bother. Could you look if the changes made for PR #245 do what you want?

@ari-wein
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Yup. Tested that build, and it works great.
Thanks SO much for implementing!

@hillu hillu closed this as completed in bfff555 Jan 14, 2025
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Add option to prefix enriched fields instead of capitalizing them hillu/laurel
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@hillu @ari-wein