diff --git a/rules/windows/file_event/win_susp_multiple_files_renamed_or_deleted.yml b/rules/windows/file_event/win_susp_multiple_files_renamed_or_deleted.yml new file mode 100644 index 000000000..488512208 --- /dev/null +++ b/rules/windows/file_event/win_susp_multiple_files_renamed_or_deleted.yml @@ -0,0 +1,27 @@ +title: Suspicious Multiple File Rename Or Delete Occurred +id: 97919310-06a7-482c-9639-92b67ed63cf8 +status: experimental +description: Detects multiple file rename or delete events occurrence within a specified period of time by a same user (these events may signalize about ransomware activity). +tags: + - attack.impact + - attack.t1486 +author: Vasiliy Burov, oscd.community +date: 2020/10/16 +references: + - https://www.manageengine.com/data-security/how-to/how-to-detect-ransomware-attacks.html +logsource: + product: windows + service: security + definition: 'Requirements: Audit Policy : Policies/Windows Settings/Security Settings/Local Policies/Audit Policy/Audit object access, Policies/Windows Settings/Security Settings/Advanced Audit Policy Configuration/Object Access' +detection: + selection: + EventID: 4663 + ObjectType: 'File' + AccessList: '%%1537' + Keywords: '0x8020000000000000' + timeframe: 30s + condition: selection | count() by SubjectLogonId > 10 +falsepositives: + - Software uninstallation + - Files restore activities +level: high