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Porter76's avatar
Porter76
Brass Contributor
Sep 22, 2023

Help with a query to count

Trying to create a query that will count all of the diffrent ruleid's over the past week but having a hard time. Any help appreciated.   Thanks!
kusto
siem
Porter76's avatar
Porter76
Brass Contributor
Sep 25, 2023

Thanks so much Clive, that worked like a charm.
Is it possible to create an alert in log analytics whenever the count for a particular WAF rule being triggered exceeds a certain threshold in a given time frame?

i.e. if the count for "AWSManagedRulesAnonymousIpList" was typically 1000 in an hour and spiked to 15000, how can I alert on this?

Clive_Watson's avatar
Clive_Watson
Bronze Contributor
Sep 25, 2023

Porter76 

 

AWSCloudTrail
| where TimeGenerated > ago(1h)
//| summarize count() by EventSource
| count
| where Count > 1000

or

AWSCloudTrail
| where TimeGenerated > ago(1d)
| summarize countPerHour=count() by EventSource, bin(TimeGenerated,1h)
| where countPerHour > 1000

 

  • Porter76's avatar
    Porter76
    Brass Contributor
    Sep 26, 2023
    Thanks Clive, could you explain the difference bewteen the 2 here? How would I apply this to a specific ruleid?

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