arch-conf-install/services/audit-framework

Audit Framework

Kernel

To ensure that all process which may have started before auditd are marked as auditable use boot time kernel param audit=1.

Userspace

• Install the audit package, enable and start the auditd.service.
• The config file is auditd.conf.
• The rules are defined in /etc/audit/audit.rules.
• auditctl can be used to edit rules on the fly.
• ausearch and aureport are used to summarize and view data.

Rules

• Read from /etc/audit/auditd.rules

• If for example /etc/audit/rules.d/syscalls.rules is the sort of structure being followed, augenrules is used to merge all the component rules files.

  • It is recommended to run first with the --check flag and --load can be used if there were no errors found.
  • The files are concatenated in order, based on their natural sort (see -v option of ls(1)) and stripped of empty and comment (#) lines.

• rulesets:

  • syscalls
    • format: -a action,list -S syscall -F field=value -k keyname
  • files
    • format: -w path-to-file -p permissions -k keyname
  • ..?

Further Reading

• man pages (list here)
• archwiki article
• syscalls docs
• update the format for rules