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Binary Executed from Shared Memory Directory

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Binary Executed from Shared Memory Directory

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Identifies the execution of a binary by root in Linux shared memory directories: (/dev/shm/, /run/shm/, /var/run/, /var/lock/). This activity is to be considered highly abnormal and should be investigated. Threat actors have placed executables used for persistence on high-uptime servers in these directories as system backdoors.

Rule type: eql

Rule indices:

logs-endpoint.events.*
endgame-*

Severity: high

Risk score: 73

Runs every: 5m

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

Elastic
Host
Linux
Threat Detection
Execution
BPFDoor
Elastic Endgame

Version: 103

Rule authors:

Elastic

Rule license: Elastic License v2

Rule query

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process where event.type == "start" and
    event.action : ("exec", "exec_event") and user.name == "root" and
    process.executable : (
        "/dev/shm/*",
        "/run/shm/*",
        "/var/run/*",
        "/var/lock/*"
    ) and
    not process.executable : ( "/var/run/docker/*")

Framework: MITRE ATT&CK^TM

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/

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