Azure Sentinel
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'This rule identifies a web request with a user agent header known to belong to a hacking tool. This indicates a hacking tool is used on the host.<br>You can add custom hacking tool indicating User-Agent headers using a watchlist, for more information refer to the [UnusualUserAgents Watchlist](https://aka.ms/ASimUnusualUserAgentsWatchlist).
This analytic rule uses [ASIM](https://aka.ms/AboutASIM) and supports any built-in or custom source that supports the ASIM WebSession schema (ASIM WebSession Schema)'
This analytic rule uses [ASIM](https://aka.ms/AboutASIM) and supports any built-in or custom source that supports the ASIM WebSession schema (ASIM WebSession Schema)'
'Detects Active Directory account lockouts'
'Identifies a match for SQL Injection 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/Top10/A03_2021-Injection/'
References: https://owasp.org/Top10/A03_2021-Injection/'
'Detects when a Temporary Access Pass (TAP) is created for a Privileged Account.
A Temporary Access Pass is a time-limited passcode issued by an admin that satisfies strong authentication requirements and can be used to onboard other authentication methods, including Passwordless ones such as Microsoft Authenticator or even Windows Hello.
A threat actor could use a TAP to register a new authentication method to maintain persistance to an account.
Review any TAP creations to ensure they were used legitimately.
Ref: https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-privileged-accounts#changes-to-privileged-accounts'
A Temporary Access Pass is a time-limited passcode issued by an admin that satisfies strong authentication requirements and can be used to onboard other authentication methods, including Passwordless ones such as Microsoft Authenticator or even Windows Hello.
A threat actor could use a TAP to register a new authentication method to maintain persistance to an account.
Review any TAP creations to ensure they were used legitimately.
Ref: https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-privileged-accounts#changes-to-privileged-accounts'
'This query will detect if user properties of Global Administrator are updated by an existing user. Usually only user administrator or other global administrator can update such properties.
Investigate if such user change is an attempt to elevate an existing low privileged identity or rogue administrator activity'
Investigate if such user change is an attempt to elevate an existing low privileged identity or rogue administrator activity'
'Detects anomalous IP address usage by user accounts and then checks to see if a suspicious Teams action is performed.
Query calculates IP usage Delta for each user account and selects accounts where a delta >= 90% is observed between the most and least used IP.
To further reduce results the query performs a prevalence check on the lowest used IP's country, only keeping IP's where the country is unusual for the tenant (dynamic ranges).
Please note, if the initial logic of prevalence to find suspicious logon activity is noisy then consider adding filtering based on Location.
Finally the user accounts activity within Teams logs is checked for suspicious commands (modifying user privileges or admin actions) during the period the suspicious IP was active.'
Query calculates IP usage Delta for each user account and selects accounts where a delta >= 90% is observed between the most and least used IP.
To further reduce results the query performs a prevalence check on the lowest used IP's country, only keeping IP's where the country is unusual for the tenant (dynamic ranges).
Please note, if the initial logic of prevalence to find suspicious logon activity is noisy then consider adding filtering based on Location.
Finally the user accounts activity within Teams logs is checked for suspicious commands (modifying user privileges or admin actions) during the period the suspicious IP was active.'
'Correlate IPs blocked by a Cisco firewall appliance with successful Microsoft Entra ID signins.
Because the IP was blocked by the firewall, that same IP logging on successfully to Entra ID is potentially suspect and could indicate credential compromise for the user account.'
Because the IP was blocked by the firewall, that same IP logging on successfully to Entra ID is potentially suspect and could indicate credential compromise for the user account.'
'This hunting query will try to identify the user account used to perform a file upload to blob storage.
This query can be used to match all file upload events, or filtering can be applied on filename to search for a specific upload.'
This query can be used to match all file upload events, or filtering can be applied on filename to search for a specific upload.'
The query for malicious file creations via TOCTOU Vulnerability in Leading Endpoint Detection and Response (EDR) and Antivirus (AV) Solutions.
- Microsoft Defender (CVE-2022-37971)
- Defender for Endpoint (CVE-2022-37971)
- SentinelOne EDR
- TrendMicro Apex One (CVE-2022-45797)
- Avast Antivirus (CVE-2022-4173)
- AVG Antivirus (CVE-2022-4173)
- Microsoft Defender (CVE-2022-37971)
- Defender for Endpoint (CVE-2022-37971)
- SentinelOne EDR
- TrendMicro Apex One (CVE-2022-45797)
- Avast Antivirus (CVE-2022-4173)
- AVG Antivirus (CVE-2022-4173)
'This query examines Microsoft Entra ID sign-ins for each application and identifies the most anomalous change in a user's location profile. The goal is to detect user account compromise, possibly via a specific application vector.'
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