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Create MultipleTeamsDeletes.yaml #1068

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Sep 17, 2020
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Create MultipleTeamsDeletes.yaml #1068

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Create MultipleTeamsDeletes.yaml
samikroy Sep 13, 2020
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30 changes: 30 additions & 0 deletions Detections/OfficeActivity/MultipleTeamsDeletes.yaml
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id: 173f8699-6af5-484a-8b06-8c47ba89b380
name: Multiple Teams deleted by a single user
description: |
'This detection flags the occurrences of deleting multiple teams within an hour.
This data is a part of Office 365 Connector in Azure Sentinel.'
severity: Low
requiredDataConnectors:
- connectorId: Office365
dataTypes:
- OfficeActivity (Teams)
queryFrequency: 1d
queryPeriod: 1d
triggerOperator: gt
triggerThreshold: 0
tactics:
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- Impact
relevantTechniques:
- T1485
- T1489
query: |

// Adjust this value to change how many Teams should be deleted before including
let max_delete_count = 3;
// Adjust this value to change the timewindow the query runs over
OfficeActivity
| where OfficeWorkload =~ "MicrosoftTeams"
| where Operation =~ "TeamDeleted"
| summarize StartTime = min(TimeGenerated), EndTime = max(TimeGenerated), DeletedTeams = make_set(TeamName) by UserId
| where array_length(DeletedTeams) > max_delete_count
| extend timestamp = StartTime, AccountCustomEntity = UserId