sigmahighHunting

Linux Keylogging with Pam.d

Detect attempt to enable auditing of TTY input

MITRE ATT&CK

collectioncredential-access

Detection Query

selection_path_events:
  type: PATH
  name:
    - /etc/pam.d/system-auth
    - /etc/pam.d/password-auth
selection_tty_events:
  type:
    - TTY
    - USER_TTY
condition: 1 of selection_*

Author

Pawel Mazur

Created

2021-05-24

Data Sources

linuxauditd

Platforms

linux

References

Tags

attack.collectionattack.credential-accessattack.t1003attack.t1056.001

Raw Content

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