Sigma rule: Use of Debugfs to Access a Raw Disk

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-8251b29bb030, updated 2023-03-24T00:00:00.000Z.

Rule

Title: Use of Debugfs to Access a Raw Disk
Status: unsupported
Level: medium
Author: Janantha Marasinghe
Date: 2022/12/20
Modified: 2023/03/24
File: unsupported/linux/lnx_auditd_debugfs_usage.yml
Commit: ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects access to a raw disk on a host to evade detection by security products.

Log source

product: linux
service: auditd

Detection

selection_debugfs:
    type: 'EXECVE'
    a0: 'debugfs'
selection_tools:
    type: 'EXECVE'
    a0:
        - 'df'
        - 'lsblk'
        - 'pvs'
        - 'fdisk'
        - 'blkid'
        - 'parted'
        - 'hwinfo'
        - 'inxi'
timeframe: 5m
condition: selection_debugfs | near selection_tools # requires both

False positives (as the rule lists them)

Unknown

MITRE ATT&CK ids this rule names

T1006

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/unsupported/linux/lnx_auditd_debugfs_usage.yml

Sources and licences

SigmaHQ
"Use of Debugfs to Access a Raw Disk" by Janantha Marasinghe (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/unsupported/linux/lnx_auditd_debugfs_usage.yml.
Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License
Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: Use of Debugfs to Access a Raw Disk",
entity page, dataset version ref-8251b29bb030, updated 2023-03-24T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/fb0647d7-371a-4553-8e20-33bbbe122956 (accessed 2026-11-03).
Underlying source: SigmaHQ rule fb0647d7-371a-4553-8e20-33bbbe122956, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.