clear journalctl logs #5439
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clear journalctl logs #5439
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phantinuss
reviewed
May 28, 2025
Co-authored-by: phantinuss <79651203+phantinuss@users.noreply.github.com>
Co-authored-by: phantinuss <79651203+phantinuss@users.noreply.github.com>
Co-authored-by: phantinuss <79651203+phantinuss@users.noreply.github.com>
Co-authored-by: phantinuss <79651203+phantinuss@users.noreply.github.com>
phantinuss
reviewed
May 31, 2025
Co-authored-by: phantinuss <79651203+phantinuss@users.noreply.github.com>
Co-authored-by: phantinuss <79651203+phantinuss@users.noreply.github.com>
Co-authored-by: phantinuss <79651203+phantinuss@users.noreply.github.com>
phantinuss
approved these changes
Jun 4, 2025
swachchhanda000
suggested changes
Jun 10, 2025
| service: auditd | ||
| detection: | ||
| selection_root: | ||
| type: 'EXECVE' |
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As also mentioned in PR 5460, it is better to use a generic Linux process creation format rather than the auditd-type EXECVE format, since most modern SIEM systems collect logs using the command-line format instead of the a0, a1 argument-style used by auditd.
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Summary of the Pull Request
Detects attempts to rotate or delete system logs using
journalctlwith options like
--rotate,--vacuum-time. These actions can be abused by attackersto erase forensic evidence after gaining elevated access.
This rule focuses on EXECVE events that capture command-line arguments.
Changelog
{ "type": "EXECVE", "msg": "audit(1748369794.317:3537)", "argc": 3, "a0": "sudo", "a1": "journalctl", "a2": "--vacuum-time=1s" }{ "type": "EXECVE", "msg": "audit(1748369794.317:3537)", "argc": 3, "a0": "sudo", "a1": "journalctl", "a2": "--rotate" }Example Log Event
Fixed Issues
SigmaHQ Rule Creation Conventions