IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
File Made Executable via Chmod Inside A Containeredit
This rule detects when chmod is used to add the execute permission to a file inside a container. Modifying file permissions to make a file executable could indicate malicious activity, as an attacker may attempt to run unauthorized or malicious code inside the container.
Rule type: eql
Rule indices:
- logs-cloud_defend*
Severity: medium
Risk score: 47
Runs every: 5m
Searches indices from: now-6m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References: None
Tags:
- Data Source: Elastic Defend for Containers
- Domain: Container
- OS: Linux
- Use Case: Threat Detection
- Tactic: Execution
- Tactic: Defense Evasion
Version: 2
Rule authors:
- Elastic
Rule license: Elastic License v2
Rule queryedit
file where container.id: "*" and event.type in ("change", "creation") and
/*account for tools that execute utilities as a subprocess, in this case the target utility name will appear as a process arg*/
(process.name : "chmod" or process.args : "chmod") and
process.args : ("*x*", "777", "755", "754", "700") and not process.args: "-x"
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Execution
- ID: TA0002
- Reference URL: https://attack.mitre.org/tactics/TA0002/
-
Technique:
- Name: Command and Scripting Interpreter
- ID: T1059
- Reference URL: https://attack.mitre.org/techniques/T1059/
-
Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
-
Technique:
- Name: File and Directory Permissions Modification
- ID: T1222
- Reference URL: https://attack.mitre.org/techniques/T1222/
-
Sub-technique:
- Name: Linux and Mac File and Directory Permissions Modification
- ID: T1222.002
- Reference URL: https://attack.mitre.org/techniques/T1222/002/