Asr Office Macro Win32api Calls Audited Deteciton Rule

# Rule : Detection of Office Macro Win32 API Calls Audited ## Description This detection rule identifies audited events where Office Macros make Win32 API calls. Monitoring for such API calls is crucial because macros can be used to execute malicious code on the system. Malicious actors often exploit Office macros to run unauthorized scripts or binaries by leveraging Win32 API calls, which can lead to system compromise or data exfiltration. This rule monitors for audited actions related to Office macros making Win32 API calls, helping to identify potentially malicious macros that could compromise the system. ## Detection Logic - Monitors `DeviceEvents` for events where: - The `ActionType` is "AsrOfficeMacroWin32ApiCallsAudited". ## Tags - Office Security - Macro Security - Win32 API Calls - Malware - Suspicious Activity ## Search Query ```kql DeviceEvents | where ActionType == "AsrOfficeMacroWin32ApiCallsAudited" ``` ## Note Exclude trusted file names as this might get noisy

Explanation

Summary of the Query

Purpose: This query is designed to detect when Office Macros make Win32 API calls, which can be a sign of malicious activity. Monitoring these events helps in identifying potentially harmful macros that could compromise the system.

Detection Logic:

The query looks at DeviceEvents.
It filters events where the ActionType is "AsrOfficeMacroWin32ApiCallsAudited".

Tags:

Office Security
Macro Security
Win32 API Calls
Malware
Suspicious Activity

Search Query:

DeviceEvents 
| where ActionType == "AsrOfficeMacroWin32ApiCallsAudited"

Note: To reduce noise, consider excluding events from trusted file names.

KQL Search