diff --git a/rules/windows/file_event/file_event_win_word_template_creation.yml b/rules/windows/file_event/file_event_win_word_template_creation.yml new file mode 100644 index 000000000..a94a226da --- /dev/null +++ b/rules/windows/file_event/file_event_win_word_template_creation.yml @@ -0,0 +1,41 @@ +title: Office Template Creation +id: 0e20c89d-2264-44ae-8238-aeeaba609ece +status: experimental +description: Detects creation of template files for Microsoft Office from outside Office +author: Max Altgelt +date: 2022/06/02 +references: + - https://insight-jp.nttsecurity.com/post/102hojk/operation-restylink-apt-campaign-targeting-japanese-companies +tags: + - attack.persistence + - attack.t1137 +logsource: + category: file_event + product: windows +detection: + selection_word: + TargetFilename|endswith: + - .dot + - .dotm + - .doc + - .docm + - .docx + - .rtf + TargetFilename|contains: '\Microsoft\Word\Startup' + selection_excel: + TargetFilename|endswith: + - .xlt + - .xltm + - .xls + - .xlsm + - .xlsx + TargetFilename|contains: '\Microsoft\Excel\Startup' + filter_office: + Image|endswith: + - \WINWORD.exe + - \EXCEL.exe + condition: 1 of selection* and not filter_office +falsepositives: + - Loading a user environment from a backup or a domain controller + - Synchronization of templates +level: high