IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.
« ESXI Discovery via Find ESXI Timestomping using Touch Command »
Elastic Docs ›Elastic Security Solution [8.8] ›Detections and alerts ›Prebuilt rule reference

ESXI Discovery via Grep

edit

ESXI Discovery via Grep

edit

Identifies instances where a process named grep, egrep, or pgrep is started on a Linux system with arguments related to virtual machine (VM) files, such as "vmdk", "vmx", "vmxf", "vmsd", "vmsn", "vswp", "vmss", "nvram", or "vmem". These file extensions are associated with VM-related file formats, and their presence in grep command arguments may indicate that a threat actor is attempting to search for, analyze, or manipulate VM files on the system.

Rule type: eql

Rule indices:

  • logs-endpoint.events.*

Severity: medium

Risk score: 47

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: Discovery
  • Data Source: Elastic Defend

Version: 5

Rule authors:

  • Elastic

Rule license: Elastic License v2

Rule query

edit
process where host.os.type == "linux" and event.type == "start" and event.action == "exec" and
process.name in ("grep", "egrep", "pgrep") and
process.args in ("vmdk", "vmx", "vmxf", "vmsd", "vmsn", "vswp", "vmss", "nvram", "vmem")

Framework: MITRE ATT&CKTM

« ESXI Discovery via Find ESXI Timestomping using Touch Command »