Analytics Story: Windows Attack Surface Reduction
Description
This story contains detections for Windows Attack Surface Reduction (ASR) events. ASR is a feature of Windows Defender Exploit Guard that prevents actions and apps that are typically used by exploit-seeking malware to infect machines. ASR rules are applied to processes and applications. When a process or application attempts to perform an action that is blocked by an ASR rule, an event is generated. This story contains detections for ASR events that are generated when a process or application attempts to perform an action that is blocked by an ASR rule.
Why it matters
This story contains detections for Windows Attack Surface Reduction (ASR) events. ASR is a feature of Windows Defender Exploit Guard that prevents actions and apps that are typically used by exploit-seeking malware to infect machines. ASR rules are applied to processes and applications. When a process or application attempts to perform an action that is blocked by an ASR rule, an event is generated. This story contains detections for ASR events that are generated when a process or application attempts to perform an action that is blocked by an ASR rule. It includes detections for both block and audit event IDs. Block event IDs are generated when an action is blocked by an ASR rule, while audit event IDs are generated when an action that would be blocked by an ASR rule is allowed to proceed for auditing purposes.
Detections
Data Sources
Name | Platform | Sourcetype | Source |
---|---|---|---|
Windows Event Log Defender 1121 | Windows | xmlwineventlog |
WinEventLog:Microsoft-Windows-Windows Defender/Operational |
Windows Event Log Defender 1122 | Windows | xmlwineventlog |
WinEventLog:Microsoft-Windows-Windows Defender/Operational |
Windows Event Log Defender 1129 | Windows | xmlwineventlog |
WinEventLog:Microsoft-Windows-Windows Defender/Operational |
Windows Event Log Defender 5007 | Windows | xmlwineventlog |
WinEventLog:Microsoft-Windows-Windows Defender/Operational |
References
- https://asrgen.streamlit.app/
- https://learn.microsoft.com/en-us/microsoft-365/security/defender-endpoint/attack-surface-reduction?view=o365-worldwide
Source: GitHub | Version: 1