Linux Keylogging with Pam.d

calendar Aug 12, 2024 · attack.credential-access attack.t1003 attack.t1056.001  ·
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Detect attempt to enable auditing of TTY input

Sigma rule (View on GitHub)

 1title: Linux Keylogging with Pam.d
 2id: 49aae26c-450e-448b-911d-b3c13d178dfc
 3status: test
 4description: Detect attempt to enable auditing of TTY input
 5references:
 6    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1056.001/T1056.001.md
 7    - https://linux.die.net/man/8/pam_tty_audit
 8    - https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/security_guide/sec-configuring_pam_for_auditing
 9    - https://access.redhat.com/articles/4409591#audit-record-types-2
10author: 'Pawel Mazur'
11date: 2021-05-24
12modified: 2022-12-18
13tags:
14    - attack.credential-access
15    - attack.t1003
16    - attack.t1056.001
17logsource:
18    product: linux
19    service: auditd
20detection:
21    selection_path_events:
22        type: PATH
23        name:
24            - '/etc/pam.d/system-auth'
25            - '/etc/pam.d/password-auth'
26    selection_tty_events:
27        type:
28            - 'TTY'
29            - 'USER_TTY'
30    condition: 1 of selection_*
31falsepositives:
32    - Administrative work
33level: high

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