Detectionlowtest

Office Macro File Download

Detects the creation of a new office macro files on the system via an application (browser, mail client). This can help identify potential malicious activity, such as the download of macro-enabled documents that could be used for exploitation.

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Launch

Nasreddine Bencherchali (Nextron Systems)Created Sun Jan 23Updated Wed Oct 290e29e3a7-1ad8-40aa-b691-9f82ecd33d66windows

Log Source

WindowsFile Event

ProductWindows← raw: windows

CategoryFile Event← raw: file_event

Events for file system activity including creation, modification, and deletion.

Detection Logic

detection:
    selection_processes:
        Image|endswith:
            # Email clients
            - '\RuntimeBroker.exe' # Windows Email clients uses RuntimeBroker to create the files
            - '\outlook.exe'
            - '\thunderbird.exe'
            # Browsers
            - '\brave.exe'
            - '\chrome.exe'
            - '\firefox.exe'
            - '\iexplore.exe'
            - '\maxthon.exe'
            - '\MicrosoftEdge.exe'
            - '\msedge.exe'
            - '\msedgewebview2.exe'
            - '\opera.exe'
            - '\safari.exe'
            - '\seamonkey.exe'
            - '\vivaldi.exe'
            - '\whale.exe'
    selection_ext:
        - TargetFilename|endswith:
              - '.docm'
              - '.dotm'
              - '.xlsm'
              - '.xltm'
              - '.potm'
              - '.pptm'
        - TargetFilename|contains:
              - '.docm:Zone'
              - '.dotm:Zone'
              - '.xlsm:Zone'
              - '.xltm:Zone'
              - '.potm:Zone'
              - '.pptm:Zone'
    condition: all of selection_*