Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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'Detects when a user has successfully authenticated to another Microsoft Entra ID tenant with an identity in your organization's tenant.
Ref: https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-user-accounts#monitoring-for-failed-unusual-sign-ins'
Ref: https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-user-accounts#monitoring-for-failed-unusual-sign-ins'
'Identifies accounts that have been locked out by smart lockout policies. Review this results for patterns that might suggest that a password spray is triggering these smart lockout events.
Ref : https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-user-accounts#monitoring-for-failed-unusual-sign-ins'
Ref : https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-user-accounts#monitoring-for-failed-unusual-sign-ins'
'Detects changes to an applications sign out URL.
Look for any modifications to a sign out URL. Blank entries or entries to non-existent locations would stop a user from terminating a session.
Ref: https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-applications#logout-url-modified-or-removed'
Look for any modifications to a sign out URL. Blank entries or entries to non-existent locations would stop a user from terminating a session.
Ref: https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-applications#logout-url-modified-or-removed'
' This query will detect when an attempt is made to update an existing user and link it to an guest or external identity. These activities are unusual and such linking of external
identities should be investigated. In some cases you may see internal Entra ID sync accounts (Sync_) do this which may be benign'
identities should be investigated. In some cases you may see internal Entra ID sync accounts (Sync_) do this which may be benign'
This detection identifies when a new packaged application has been added, updated, or deleted within Microsoft Intune. This functionality, while legitimate for software deployment, can be abused by adversaries to deploy malicious payloads to Intune-managed devices.
As described in previous guidance, Nobelium may re-purpose legitimate existing OAuth Applications in the environment to their own ends. However, malicious activity patterns may be discernable from legitimate ones.
The following query returns OAuth Applications that access mail both directly and via Graph, allowing review of whether such dual access methods follow expected use patterns.
Reference - https://msrc-blog.microsoft.com/2020/12/13/customer-guidance-on-recent-nation-state-cyber-attacks/
The following query returns OAuth Applications that access mail both directly and via Graph, allowing review of whether such dual access methods follow expected use patterns.
Reference - https://msrc-blog.microsoft.com/2020/12/13/customer-guidance-on-recent-nation-state-cyber-attacks/
In this query, we are looking for Url clicks on emails which are generated the alert-A potentially malicious URL click was detected
This query shows details about all approved Entra ID Governance Access Packages assignments. The results include the time the request was created and approved along with the justification text provided by the requestor and the approver.
'Identifies a match for XSS attack in the Application gateway WAF logs. The Threshold value in the query can be changed as per your infrastructure's requirement.
References: https://owasp.org/www-project-top-ten/2017/A7_2017-Cross-Site_Scripting_(XSS)'
References: https://owasp.org/www-project-top-ten/2017/A7_2017-Cross-Site_Scripting_(XSS)'
'Detects when a guest account in a tenant is converted to a member of the tenant.
Monitoring guest accounts and the access they are provided is important to detect potential account abuse.
Accounts converted to members should be investigated to ensure the activity was legitimate.
Ref: https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-user-accounts#monitoring-for-failed-unusual-sign-ins'
Monitoring guest accounts and the access they are provided is important to detect potential account abuse.
Accounts converted to members should be investigated to ensure the activity was legitimate.
Ref: https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-user-accounts#monitoring-for-failed-unusual-sign-ins'
This query helps hunting for Automated email notifications and suspicious sign-in activity
'Detects changes to the ownership of an appplicaiton.
Monitor these changes to make sure that they were authorized.
Ref: https://learn.microsoft.com/en-gb/entra/architecture/security-operations-applications#new-owner'
Monitor these changes to make sure that they were authorized.
Ref: https://learn.microsoft.com/en-gb/entra/architecture/security-operations-applications#new-owner'
This detection approach correlates a user accessing an email with image/document attachments and a risky sign-in attempt from non-trusted devices.
'This query looks for sign ins by the Microsoft Entra ID Connect Sync account to Azure where properties about the logon are anomalous.
This query uses Microsoft Sentinel's UEBA features to detect these suspicious properties.
A threat actor may attempt to steal the Sync account credentials and use them to access Azure resources. This alert should be
reviewed to ensure that the log in came was from a legitimate source.'
This query uses Microsoft Sentinel's UEBA features to detect these suspicious properties.
A threat actor may attempt to steal the Sync account credentials and use them to access Azure resources. This alert should be
reviewed to ensure that the log in came was from a legitimate source.'
'This query looks for accounts being created that do not have attributes populated that are commonly populated in the tenant.
Attackers may attempt to add accounts as a means of establishing persistant access to an environment, looking for anomalies in created accounts may help identify illegitimately created accounts.
Created accounts should be investigated to ensure they were legitimated created.
Ref: https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-user-accounts#accounts-not-following-naming-policies'
Attackers may attempt to add accounts as a means of establishing persistant access to an environment, looking for anomalies in created accounts may help identify illegitimately created accounts.
Created accounts should be investigated to ensure they were legitimated created.
Ref: https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-user-accounts#accounts-not-following-naming-policies'
'This query looks for an account being created from a domain that is not regularly seen in a tenant.
Attackers may attempt to add accounts from these sources as a means of establishing persistant access to an environment.
Created accounts should be investigated to confirm expected creation.
Ref: https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-user-accounts#short-lived-accounts'
Attackers may attempt to add accounts from these sources as a means of establishing persistant access to an environment.
Created accounts should be investigated to confirm expected creation.
Ref: https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-user-accounts#short-lived-accounts'
'Identifies a list of IP addresses with a minimum number (defualt of 5) of failed logon attempts to Microsoft Entra ID.
Uses that list to identify any successful AWS Console logons from these IPs within the same timeframe.'
Uses that list to identify any successful AWS Console logons from these IPs within the same timeframe.'
'Any Alerts that fired related to a given account during the range of +6h and -3d'
'Access attempts to Azure Portal from an unauthorized user. Either invalid password or the user account does not exist.'
'Detects a Conditional Access Policy being modified by a user who has not modified a policy in the last 14 days.
A threat actor may try to modify policies to weaken the security controls in place.
Investigate any change to ensure they are approved.
Ref: https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-infrastructure#conditional-access'
A threat actor may try to modify policies to weaken the security controls in place.
Investigate any change to ensure they are approved.
Ref: https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-infrastructure#conditional-access'
'This hunting query identifies a fork activity against a repository done by a user who is not the owner of the repo nor a contributes.'
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