CrowdStrike / psfalcon

PowerShell for CrowdStrike's OAuth2 APIs
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{"code":400,"message":"offset 10000 and limit 100 are invalid; offset + limit must be less than or equal to 10000"} #394

Closed brushenas closed 5 months ago

brushenas commented 5 months ago

Describe the bug

The following code to retrieve a large number of accounts (more than 20K accounts) but the function fails after 10,000. Not sure if I am using the Limit and Offset parameters properly or not but if it is wrong I will appreciate if you can provide a sample.

To Reproduce

function LoadCrowdStrikeAccounts { param([string]$filter) [int]$offset=0 [int]$limit=100 $accounts=$() do{ $accts=Get-FalconAsset -Account -Filter $filter -Limit $limit -Offset $offset -Detailed $offset +=$limit $accounts +=$accts
} while($accts.count)

return $accounts }

$crowdUsers=LoadCrowdStrikeAccounts -filter "username:!null"**_

Write-Result: C:\Users\BRUSHENAS\Documents\PowerShell\Modules\PSFalcon\2.2.6\private\Private.ps1:663:9 Line | 663 | Write-Result $Object | ~~~~ | {"code":400,"message":"offset 10000 and limit 100 are invalid; offset + limit must be less than or equal to 10000"}

Expected behavior I am expecting to return me the total number of accounts which is more than 20,000

Environment (please complete the following information):

Additional context Add any other context about the problem here.

Transcript content If possible, please include a PowerShell transcript.

  1. Set $VerbosePreference = 'Continue'
  2. Run Import-Module, Request-FalconToken, Start-Transcript, Show-FalconModule, the affected PSFalcon commands or script, and Stop-Transcript
  3. Copy/paste transcript content
bk-cs commented 5 months ago

This is normal and expected behavior; the majority of the CrowdStrike APIs won't return more than 10,000 results--they're designed to return the results of a filtered search, not "all data". -All is provided as a "best effort" fashion to return whatever the API will allow you to retrieve through pagination.

In general, it's best to try different filter values until you have a total result set of less than 10,000. Breaking the results into groups using timestamps, names, etc.

Here's an example script that will break "applications" up into smaller groups when using the Falcon Discover APIs: https://github.com/CrowdStrike/psfalcon/blob/dev/samples/discover/retrieve_hosts_and_their_applications.ps1

brushenas commented 5 months ago

I have seen in other CrowdStrike GIT repository where they are able to return all data by leveraging the meta data as explained in the following link. is it something that can be leveraged for this PS module?

https://github.com/CrowdStrike/falconpy/discussions/536

bk-cs commented 5 months ago

That's a difference in the APIs. Get-FalconHost, which calls the API referenced in that python issue (GET /devices/queries/devices-scroll/v1), will return all results when used with -All. It is one of the few that will return all results without a limit.

PSFalcon's -All will return all results when the API allows. If the API doesn't allow it, you're going to get an error at 10,000 results. This is also mentioned in the documentation for the All parameter: https://github.com/CrowdStrike/psfalcon/wiki/Importing,-Syntax-and-Output#all