Azure Sentinel
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This query lists files copied to USB external drives with USB drive information based on FileCreated events associated with most recent USBDriveMount events befor file creations. But be aware that Advanced Hunting is not monitoring all the file types.
'Detects potentially malicious Visual Studio Code (VSCode) extensions installed on a users system, which threat actors might use to control devices and exfiltrate personal information.
Ref: https://blog.checkpoint.com/securing-the-cloud/malicious-vscode-extensions-with-more-than-45k-downloads-steal-pii-and-enable-backdoors/'
Ref: https://blog.checkpoint.com/securing-the-cloud/malicious-vscode-extensions-with-more-than-45k-downloads-steal-pii-and-enable-backdoors/'
This query looks for users sharing access to files with external users.
This applies to SharePoint and OneDrive users.
Audit event and Cloud application identifier references.
Reference - https://learn.microsoft.com/microsoft-365/compliance/audit-log-sharing?view=o365-worldwide
Reference - https://learn.microsoft.com/azure/sentinel/entities-reference#cloud-application-identifiers
This applies to SharePoint and OneDrive users.
Audit event and Cloud application identifier references.
Reference - https://learn.microsoft.com/microsoft-365/compliance/audit-log-sharing?view=o365-worldwide
Reference - https://learn.microsoft.com/azure/sentinel/entities-reference#cloud-application-identifiers
In this detection,we hunt for any sign-in attempt from a non-managed, non-compliant, untrusted device.
'This hunting query looks in Azure Web Application Firewall data to find possible SpringShell Exploitation Attempt (CVE-2022-22965).
The Spring Framework is one of the most widely used lightweight open-source framework for Java. To exploit the vulnerability attackers can
send a specially crafted query to a web server running the Spring Core framework to change the target of logging facility and create a new
malicious JSP file in a location accessible by http requests. Attackers then make requests to the malicious backdoor to run system commands.
Reference: https://www.microsoft.com/security/blog/2022/04/04/springshell-rce-vulnerability-guidance-for-protecting-against-and-detecting-cve-2022-22965/'
The Spring Framework is one of the most widely used lightweight open-source framework for Java. To exploit the vulnerability attackers can
send a specially crafted query to a web server running the Spring Core framework to change the target of logging facility and create a new
malicious JSP file in a location accessible by http requests. Attackers then make requests to the malicious backdoor to run system commands.
Reference: https://www.microsoft.com/security/blog/2022/04/04/springshell-rce-vulnerability-guidance-for-protecting-against-and-detecting-cve-2022-22965/'
This query visualises the amount of spam emails that are quarantined, summarized daily by the detection method
'Malware authors will sometimes hardcode user agent string values when writing the network communication component of their malware. Malformed user agents can be an indication of such malware.'
'This query identifies attackers trying to enumerate the Storage keys as well as updating roles using AzureActivity,SigninLogs
and AuditLogs'
and AuditLogs'
// Detect multiple sensitive Active Directory LDAP queries made in bin time
// Sensitive queries defined as Roasting or sensitive objects queries
// Replace 10 on line 6 with your desired thershold
// Replace 1m on line 7 with your desired bin time
// This LDAP query cover Rubeus, Kerberoast, BloodHound tools
// Sensitive queries defined as Roasting or sensitive objects queries
// Replace 10 on line 6 with your desired thershold
// Replace 1m on line 7 with your desired bin time
// This LDAP query cover Rubeus, Kerberoast, BloodHound tools
This query looks for Teams messages from an external user with a suspicious display name.
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