[metadata]
creation_date = "2023/04/11"
integration = ["endpoint"]
maturity = "production"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.5.0"
updated_date = "2023/04/11"

[rule]
author = ["Elastic"]
description = """
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.
"""
from = "now-9m"
index = ["logs-endpoint.events.*"]
language = "eql"
license = "Elastic License v2"
name = "ESXI Discovery via Grep"
references = [
    "https://www.bleepingcomputer.com/news/security/massive-esxiargs-ransomware-attack-targets-vmware-esxi-servers-worldwide/",
]
risk_score = 47
rule_id = "2b662e21-dc6e-461e-b5cf-a6eb9b235ec4"
severity = "medium"
tags = ["Elastic", "Host", "Linux", "Threat Detection", "Discovery"]
timestamp_override = "event.ingested"
type = "eql"
query = '''
process where host.os.type == "linux" and event.type == "start" and event.action == "exec" and
process.name : ("grep", "egrep", "pgrep") and
process.args : ("vmdk", "vmx", "vmxf", "vmsd", "vmsn", "vswp", "vmss", "nvram", "vmem")
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1518"
name = "Software Discovery"
reference = "https://attack.mitre.org/techniques/T1518/"


[rule.threat.tactic]
id = "TA0007"
name = "Discovery"
reference = "https://attack.mitre.org/tactics/TA0007/"