Detections

Explore public detection logic contributed by the community across SIEM and rule languages.

3,141 detections

Detects the addition of a new Federated Domain.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
001
Detects when a Microsoft Cloud App Security reported when users were active from an IP address that has been identified as an anonymous proxy IP address.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
001
Detects when a Microsoft Cloud App Security reported when a user or IP address uses an app that is not sanctioned to perform an activity that resembles an attempt to exfiltrate information from your organization.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
001
Alert on when a user has performed an eDiscovery search or exported a PST file from the search. This PST file usually has sensitive information including email body content
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
001
Alert when a user has performed an export to a search using 'New-ComplianceSearchAction' with the '-Export' flag. This detection will detect PST export even if the 'eDiscovery search or exported' alert is disabled in the O365.This rule will apply to ExchangePowerShell usage and from the cloud.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
001
Detects when a Microsoft Cloud App Security reported users were active from an IP address identified as risky by Microsoft Threat Intelligence.
These IP addresses are involved in malicious activities, such as Botnet C&C, and may indicate compromised account.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
000
Detects when a Microsoft Cloud App Security reported when an activity occurs from a location that wasn't recently or never visited by any user in the organization.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
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Detects when a Microsoft Cloud App Security reported when a user uploads files to the cloud that might be infected with ransomware.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
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Detects when a Microsoft Cloud App Security reported suspicious email forwarding rules, for example, if a user created an inbox rule that forwards a copy of all emails to an external address.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
000
Detects when a Microsoft Cloud App Security reported when an app downloads multiple files from Microsoft SharePoint or Microsoft OneDrive in a manner that is unusual for the user.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
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Detects when a Microsoft Cloud App Security reported a user has deleted a unusual a large volume of files.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
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Detects when a Security Compliance Center reported a user who exceeded sending limits of the service policies and because of this has been restricted from sending email.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
000
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