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Elastic Docs ›Elastic Security Solution [8.8] ›Detections and alerts ›Prebuilt rule reference

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:

  • Domain: Endpoint
  • OS: Linux
  • Use Case: Threat Detection
  • Tactic: Execution
  • Threat: BPFDoor
  • Data Source: Elastic Endgame
  • Data Source: Elastic Defend

Version: 108

Rule authors:

  • Elastic

Rule license: Elastic License v2

Rule query

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process where host.os.type == "linux" and event.type == "start" and event.action in ("exec", "exec_event") and
process.executable : ("/dev/shm/*", "/run/shm/*", "/var/run/*", "/var/lock/*") and
not process.executable : ("/var/run/docker/*", "/var/run/utsns/*", "/var/run/s6/*", "/var/run/cloudera-scm-agent/*") and
user.id == "0"

Framework: MITRE ATT&CKTM

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