Suspicious Multiple File Rename Or Delete Occurred

calendar Apr 21, 2023 · attack.impact attack.t1486  ·
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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).

Sigma rule (View on GitHub)

 1title: Suspicious Multiple File Rename Or Delete Occurred
 2id: 97919310-06a7-482c-9639-92b67ed63cf8
 3status: unsupported
 4description: 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).
 5references:
 6    - https://www.manageengine.com/data-security/how-to/how-to-detect-ransomware-attacks.html
 7author: Vasiliy Burov, oscd.community
 8date: 2020/10/16
 9modified: 2023/02/24
10tags:
11    - attack.impact
12    - attack.t1486
13logsource:
14    product: windows
15    service: security
16    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'
17detection:
18    selection:
19        EventID: 4663
20        ObjectType: 'File'
21        AccessList: '%%1537'
22        Keywords: '0x8020000000000000'
23    timeframe: 30s
24    condition: selection | count() by SubjectLogonId > 10
25falsepositives:
26    - Software uninstallation
27    - Files restore activities
28level: medium

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