38 lines
1.3 KiB
YAML
38 lines
1.3 KiB
YAML
title: Fsutil Suspicious Invocation
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author: Ecco, E.M. Anhaus, oscd.community
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date: 2019/09/26
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description: Detects suspicious parameters of fsutil (deleting USN journal, configuring
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it with small size, etc). Might be used by ransomwares during the attack (seen
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by NotPetya and others).
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detection:
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SELECTION_1:
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EventID: 1
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SELECTION_2:
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Image: '*\fsutil.exe'
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SELECTION_3:
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OriginalFileName: fsutil.exe
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SELECTION_4:
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CommandLine: '*deletejournal*'
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SELECTION_5:
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CommandLine: '*createjournal*'
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condition: (SELECTION_1 and (SELECTION_2 or SELECTION_3) and (SELECTION_4 or SELECTION_5))
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falsepositives:
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- Admin activity
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- Scripts and administrative tools used in the monitored environment
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id: add64136-62e5-48ea-807e-88638d02df1e
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level: high
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logsource:
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category: process_creation
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product: windows
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modified: 2019/11/11
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references:
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- https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/fsutil-usn
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- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1070/T1070.md
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- https://eqllib.readthedocs.io/en/latest/analytics/c91f422a-5214-4b17-8664-c5fcf115c0a2.html
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tags:
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- attack.defense_evasion
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- attack.t1070
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yml_filename: win_susp_fsutil_usage.yml
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yml_path: /Users/user/Documents/YamatoSecurity/sigma/rules/windows/process_creation
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