Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
8,407 detections
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'Query over SigninLogs summarizes login attempts per hour on weekdays. Kusto anomaly detection finds login spikes. Calculates percentage change between anomalous period and average logins. Determines success and failure rate for logins for 1 hour period.'
'This identifies when a user account successfully logs onto a given App and within 1 minute fails to logon to a different App.
This may indicate a malicious attempt at accessing disallowed Apps for discovery or potential lateral movement'
This may indicate a malicious attempt at accessing disallowed Apps for discovery or potential lateral movement'
'Identifies accounts that are added to a privileged group and then quickly removed, which could be a sign of compromise.'
'Query identifies users denied registration for multiple webinars or recordings but successfully registered for at least one event. Threshold variable adjusts number of events user needs to be rejected from.'
Prior to deploying Macaw ransomware in an organization, the adversary will disable several tools and functions in order to inhibit later recovery efforts.
Added credential from country X and Signed-In from country Y in a pecific time window:
This query tries to find all applications that credentials were added to them from country X while the application's identity Signed-In from country Y in a specific time window.
This query tries to find all applications that credentials were added to them from country X while the application's identity Signed-In from country Y in a specific time window.
Use this query to locate persistence in Startup with HTA files.
Use this query to locate injected processes launching discovery activity. Qakbot has been observed leading to ransomware in numerous instances.
This query helps identifying when new items being added to the Tenant/Allow Block List (TABL) in Defender for Office 365.
Intent:
- Use MTP capability to look for insider threat potential risk indicators
- Indicators would then serve as the building block for insider threat risk modeling in subsequent tools
Definition of Insider Threat:
"The potential for an individual who has or had authorized access to an organization's assets to use their access, either maliciously or unintentionally, to act in a way that could negatively affect the organization."
This collection of queries describes the different indicators that could be used to model and look for patterns suggesting an increased risk of an individual becoming a potential insider threat.
Note: no single indicator should be used as a lone determinant of insider threat activity, but should be part of an overall program to understand the increased risk to your organization's critical assets. This in turn is used to feed an investigation by a formal insider threat program to look at the context associated with the whole person to understand the implication of a set of indicators.
- Use MTP capability to look for insider threat potential risk indicators
- Indicators would then serve as the building block for insider threat risk modeling in subsequent tools
Definition of Insider Threat:
"The potential for an individual who has or had authorized access to an organization's assets to use their access, either maliciously or unintentionally, to act in a way that could negatively affect the organization."
This collection of queries describes the different indicators that could be used to model and look for patterns suggesting an increased risk of an individual becoming a potential insider threat.
Note: no single indicator should be used as a lone determinant of insider threat activity, but should be part of an overall program to understand the increased risk to your organization's critical assets. This in turn is used to feed an investigation by a formal insider threat program to look at the context associated with the whole person to understand the implication of a set of indicators.
First query digs in print spooler drivers folder for any file creations,
MANY OF THE FILES THAT SHOULD COME UP HERE MAY BE LEGIT. Unsigned files
or ones that don't have any relations to printers that you are using are
suspicious.
Second query that can be used for finding client machines that
could be operating print servers or file servers is also included here.
As additional mitigation for the exploit you might want to block the
incoming traffic to the SMB or EPMAP Ports (445) if you need to keep the
spooler service running to print from clients.
MANY OF THE FILES THAT SHOULD COME UP HERE MAY BE LEGIT. Unsigned files
or ones that don't have any relations to printers that you are using are
suspicious.
Second query that can be used for finding client machines that
could be operating print servers or file servers is also included here.
As additional mitigation for the exploit you might want to block the
incoming traffic to the SMB or EPMAP Ports (445) if you need to keep the
spooler service running to print from clients.
'This query looks at the last 14 days for "Consent to application" operation by a user/app which could potentially mean unauthorized access. Additional context is added from AuditLogs based on CorrleationId from the same account that performed the action.'
'This hunting query looks for increases in the number of workspaces queried by a user.'
Following the September 14th, 2021 release of three Elevation of Privilege (EoP) vulnerabilities (CVE-2021-38645, CVE-2021-38649, CVE-2021-38648) and one unauthenticated Remote Code Execution (RCE) vulnerability (CVE-2021-38647) in the Open Management Infrastructure (OMI) Framework.
This detection validates that any OMS-agent that is reporting to the Microsoft Sentinel workspace is updated with the patch. The detection will go over the heartbeats received from all agents over the last day and will create alert for those agents who are not updated.
This detection validates that any OMS-agent that is reporting to the Microsoft Sentinel workspace is updated with the patch. The detection will go over the heartbeats received from all agents over the last day and will create alert for those agents who are not updated.
'Identifies whenever a user account has the setting "Password Never Expires" in the user account properties selected.
This is indicated in Security event 4738 in the EventData item labeled UserAccountControl with an included value of %%2089.
%%2089 resolves to "Don't Expire Password - Enabled".'
This is indicated in Security event 4738 in the EventData item labeled UserAccountControl with an included value of %%2089.
%%2089 resolves to "Don't Expire Password - Enabled".'
New Service Creation
Sigma
Detects creation of a new service.
Detects changes to the Registry in which a monitor program gets registered to monitor the exit of another process
Detects Hurricane Panda Activity
Detects blocked load events that did not meet the authenticode signing level requirements or violated the code integrity policy.
Detects the presence of a loaded unsigned kernel module on the system.
Detects loaded kernel modules that did not meet the WHQL signing requirements.
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