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31 lines
1.2 KiB
YAML
31 lines
1.2 KiB
YAML
title: Fsutil Suspicious Invocation
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id: add64136-62e5-48ea-807e-88638d02df1e
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description: Detects suspicious parameters of fsutil (deleting USN journal, configuring it with small size, etc). Might be used by ransomwares during the attack (seen by NotPetya and others).
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author: Ecco, E.M. Anhaus, oscd.community
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date: 2019/09/26
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modified: 2019/11/11
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level: high
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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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logsource:
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category: process_creation
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product: windows
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detection:
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binary_1:
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Image|endswith: '\fsutil.exe'
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binary_2:
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OriginalFileName: 'fsutil.exe'
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selection:
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CommandLine|contains:
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- 'deletejournal' # usn deletejournal ==> generally ransomware or attacker
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- 'createjournal' # usn createjournal ==> can modify config to set it to a tiny size
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condition: (1 of binary_*) and selection
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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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