Microsoft Entra tenant with bulk changes of groups
Cayosoft Threat Definition CTD-000064
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Risk Summary
Bulk changes might be a result of threat activities.
- Severity: Medium
- Platform: Entra ID
- Category: Account protection
- MITRE ATT&CK Tactics: Impact
- MITRE D3FEND Tactics: User Account Permissions
Description
Bulk changes might be malicious or accidental. Deletions or modifications of Microsoft Entra objects can lead to service outages. NOTE: This threat rule includes a built-in lookback parameter set to 25 hours. Only events that occurred within this timeframe are processed by the rule.
Real-World Scenario
An attacker gains access to a helpdesk account with group management permissions. Within 30 minutes, the attacker deletes 60 Microsoft 365 groups tied to Teams and SharePoint, breaking access to key resources and halting collaboration across multiple departments. Users lose file access and meeting chats, and automated workflows fail. Cayosoft Guardian detects the bulk deletion pattern within the configured threshold and raises CTD-000064 with evidence listing the first/last event times and a sample of affected groups, allowing rapid response before the impact spreads.
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Real-time alerts across AD & Entra ID with one-click rollback.
Detect this and other threats with Cayosoft Guardian Protector (Free of Charge)
1.) Download Cayosoft Guardian Protector for free real-time threat detection and monitoring of your hybrid AD and Microsoft 365 environment. Once downloaded, sign in and navigate to the Threat Detection Dashboard.
2.) Open All Alerts and search for CTD-000064 or Microsoft Entra tenant with bulk changes of groups.
3.) Open any alert and Click for details (from Raise Threat Alert action).
4.)Evidence:
- First event time (UTC)
- Last event time (UTC)
- Total number of objects
- Affected objects (first N per configuration)
Remediation Steps
To rollback unwanted changes:
- ) Go to Change History.
- ) Select unwanted changes.
- ) Roll them back.
How to Prevent It
Cayosoft Guardian can proactively detect and alert on Microsoft Entra tenant with bulk changes of groups. It continuously monitors Active Directory, Entra ID, Microsoft 365, and Intune for 200+ misconfigurations, providing early warning before attackers can exploit them.
FAQ
Because sudden mass deletions or modifications can instantly disrupt access to Teams, SharePoint, applications, and workflows. Attackers often use bulk operations to cause outages or hide privilege manipulation.
Examine Change History for who initiated the changes, which groups were affected, whether service principals or automated systems were involved, and whether the pattern aligns with maintenance or suspicious activity.
It depends on configuration. The rule primarily monitors deletion and undeletion events, but bulk creation can be enabled if required.
Yes. Cayosoft Guardian Protector can detect AD, Entra ID, and Microsoft 365 risks — including bulk change anomalies — at no cost.
Yes. Cayosoft Guardian offers continuous monitoring, real-time alerting, configuration auditing, and prescriptive remediation for 200+ AD, Entra ID, M365, and Intune misconfigurations.
Final Thought
Proactive monitoring and timely remediation of configuration risks is essential to maintaining a secure Active Directory and Microsoft 365 environment. By addressing issues like Microsoft Entra tenant with bulk changes of groups, you reduce attack surfaces and strengthen your organization’s overall security posture.