Unix Auditd Modeling Rule

Modeling Rule

Auditd

Details

IDunix_auditd_modeling_rule
From Version6.10.0
TagsUnix Auditd

Rules (XIF)

[MODEL:dataset="unix_auditd_raw"]
alter eventid = arrayindex(regextract(_raw_log, "audit\([^\:]+\:([^\)]+)"),0),
hostname = arrayindex(regextract(_raw_log ,"\w+\s\d+\s\d+\:\d+\:\d+\s(\w+)\s"),0),
type = arrayindex(regextract(_raw_log , "type\=([^\s]+)"),0),
ses = arrayindex(regextract(_raw_log ,"\sses\=(\S+)\s"),0),
res = arrayindex(regextract(_raw_log ,"\sres\=([a-zA-Z0-9\-\_]+)"),0),
success = arrayindex(regextract(_raw_log ,"\ssuccess\=(\S+)\s"),0),
key = arrayindex(regextract(_raw_log ,"\skey\=\"([^\"]+)\""),0),
op = arrayindex(regextract(_raw_log ,"\sop\=PAM\:(\S+)\s"),0),
acct = arrayindex(regextract(_raw_log ,"\sacct\=\"*([^\"]+)\"*\s"),0),
uid = arrayindex(regextract(_raw_log ,"\suid\=(\S+)\s"),0),
addr = arrayindex(regextract(_raw_log ,"\saddr\=(\d+\.\d+\.\d+\.\d+)\s"),0),
pid = arrayindex(regextract(_raw_log ,"\spid\=(\S+)\s"),0),
comm = arrayindex(regextract(_raw_log ,"\scomm\=\"*([^\"]+)\"*\s"),0),
exe = arrayindex(regextract(_raw_log ,"\sexe\=\"*([^\"]+)\"*\s"),0)
| alter
    outcome_result = coalesce(res,success)
| alter
    xdm.event.id = eventid,
	xdm.event.type = type,
    xdm.session_context_id = ses,
    xdm.event.outcome = if(outcome_result = "failed", XDM_CONST.OUTCOME_FAILED, outcome_result = "no", XDM_CONST.OUTCOME_FAILED, outcome_result = "success", XDM_CONST.OUTCOME_SUCCESS, outcome_result = "yes", XDM_CONST.OUTCOME_SUCCESS, outcome_result = null, null, to_string(outcome_result)),
    xdm.event.operation = coalesce(op,key),
	xdm.source.user.username = acct,
	xdm.source.user.identifier = uid,
	xdm.source.ipv4 = addr,
    xdm.source.process.pid = to_number(pid),
    xdm.source.host.hostname = hostname,
    xdm.source.process.command_line = comm,
    xdm.source.process.executable.path = exe;

Schema

unix_auditd_raw

Field Type Array?
_raw_log string
Raw JSON
{
    "unix_auditd_raw": {
        "_raw_log": {
          "type": "string",
          "is_array": false
        }
    }
  }