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August 7, 2023 13:58
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Hunting query for Midnight Blizzard based on the IoCs from https://www.microsoft.com/en-us/security/blog/2023/08/02/midnight-blizzard-conducts-targeted-social-engineering-over-microsoft-teams/
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| OfficeActivity | |
| | where TimeGenerated > ago(90d) | |
| | where UserId has_any ("msftprotection","identityVerification","accountsVerification","azuresecuritycenter","teamsprotection") and UserId has "onmicrosoft" | |
| | summarize by UserId |
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| OfficeActivity | |
| | where TimeGenerated > ago(90d) | |
| | where UserId has_any ("msftprotection","identityVerification","accountsVerification","azuresecuritycenter","teamsprotection") and UserId has "onmicrosoft" | |
| | where RecordType == "MicrosoftTeams" | |
| | where Operation == "MessageSent" | |
| | summarize by ChatThreadId | |
| | join kind=inner OfficeActivity on ChatThreadId |
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