Processes with Trailing Spacesedit
Identify instances where adversaries include trailing space characters to mimic regular files, disguising their activity to evade default file handling mechanisms.
Rule type: eql
Rule indices:
- logs-endpoint.events.*
- endgame-*
- 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:
- Domain: Endpoint
- OS: Linux
- OS: macOS
- Use Case: Threat Detection
- Tactic: Defense Evasion
- Rule Type: BBR
- Data Source: Elastic Defend
- Data Source: Elastic Endgame
- Data Source: Auditd Manager
Version: 2
Rule authors:
- Elastic
Rule license: Elastic License v2
Rule queryedit
process where event.type == "start" and event.action in ("exec", "exec_event", "executed", "process_started") and process.name : "* "
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
-
Technique:
- Name: Masquerading
- ID: T1036
- Reference URL: https://attack.mitre.org/techniques/T1036/
-
Sub-technique:
- Name: Space after Filename
- ID: T1036.006
- Reference URL: https://attack.mitre.org/techniques/T1036/006/