IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Suspicious Proc Pseudo File System Enumerationedit
This rule monitors for a rapid enumeration of 25 different proc cmd, stat, and exe files, which suggests an abnormal activity pattern. Such behavior could be an indicator of a malicious process scanning or gathering information about running processes, potentially for reconnaissance, privilege escalation, or identifying vulnerable targets.
Rule type: threshold
Rule indices:
- auditbeat-*
- logs-auditd_manager.auditd-*
Severity: low
Risk score: 21
Runs every: 60m
Searches indices from: now-119m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References: None
Tags:
- OS: Linux
- Use Case: Threat Detection
- Tactic: Discovery
- Rule Type: BBR
Version: 5
Rule authors:
- Elastic
Rule license: Elastic License v2
Rule queryedit
host.os.type:linux and event.category:file and event.action:"opened-file" and file.path : (/proc/*/cmdline or /proc/*/stat or /proc/*/exe) and not process.name : ( ps or netstat or landscape-sysin or w or pgrep or pidof or needrestart or apparmor_status ) and not process.parent.pid : 1
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Discovery
- ID: TA0007
- Reference URL: https://attack.mitre.org/tactics/TA0007/
-
Technique:
- Name: Process Discovery
- ID: T1057
- Reference URL: https://attack.mitre.org/techniques/T1057/
-
Technique:
- Name: System Information Discovery
- ID: T1082
- Reference URL: https://attack.mitre.org/techniques/T1082/