Nasreddine Bencherchali
598d29f811
chore: change tags, date, modified fields to comply with v2 of the Sigma spec. chore: update the related type from `obsoletes` to `obsolete`. chore: update local json schema to the latest version.
38 lines
1.6 KiB
YAML
38 lines
1.6 KiB
YAML
title: Fsutil Suspicious Invocation
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id: add64136-62e5-48ea-807e-88638d02df1e
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status: stable
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description: |
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Detects suspicious parameters of fsutil (deleting USN journal, configuring it with small size, etc).
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Might be used by ransomwares during the attack (seen by NotPetya and others).
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references:
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- https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/fsutil-usn
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- https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/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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- https://github.com/albertzsigovits/malware-notes/blob/558898932c1579ff589290092a2c8febefc3a4c9/Ransomware/Lockbit.md
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- https://blog.cluster25.duskrise.com/2023/05/22/back-in-black-blackbyte-nt
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author: Ecco, E.M. Anhaus, oscd.community
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date: 2019-09-26
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modified: 2023-09-09
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tags:
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- attack.defense-evasion
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- attack.impact
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- attack.t1070
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- attack.t1485
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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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selection_img:
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- Image|endswith: '\fsutil.exe'
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- OriginalFileName: 'fsutil.exe'
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selection_cli:
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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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- 'setZeroData' # file setZeroData ==> empties a file with zeroes
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condition: all of 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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level: high
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