Justin Ibarra
46d5e37b76
* min_stack all rules to 8.3 * bump date Co-authored-by: Mika Ayenson <mika.ayenson@elastic.co>
75 lines
2.2 KiB
TOML
75 lines
2.2 KiB
TOML
[metadata]
|
|
creation_date = "2020/04/24"
|
|
maturity = "production"
|
|
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
|
|
min_stack_version = "8.3.0"
|
|
updated_date = "2022/08/24"
|
|
|
|
[rule]
|
|
author = ["Elastic"]
|
|
description = """
|
|
Kernel modules are pieces of code that can be loaded and unloaded into the kernel upon demand. They extend the
|
|
functionality of the kernel without the need to reboot the system. This rule identifies attempts to remove a kernel
|
|
module.
|
|
"""
|
|
false_positives = [
|
|
"""
|
|
There is usually no reason to remove modules, but some buggy modules require it. These can be exempted by username.
|
|
Note that some Linux distributions are not built to support the removal of modules at all.
|
|
""",
|
|
]
|
|
from = "now-9m"
|
|
index = ["auditbeat-*", "logs-endpoint.events.*"]
|
|
language = "kuery"
|
|
license = "Elastic License v2"
|
|
name = "Kernel Module Removal"
|
|
references = ["http://man7.org/linux/man-pages/man8/modprobe.8.html"]
|
|
risk_score = 73
|
|
rule_id = "cd66a5af-e34b-4bb0-8931-57d0a043f2ef"
|
|
severity = "high"
|
|
tags = ["Elastic", "Host", "Linux", "Threat Detection", "Defense Evasion"]
|
|
timestamp_override = "event.ingested"
|
|
type = "query"
|
|
|
|
query = '''
|
|
event.category:process and event.type:(start or process_started) and
|
|
process.args:((rmmod and sudo) or (modprobe and sudo and ("--remove" or "-r")))
|
|
'''
|
|
|
|
|
|
[[rule.threat]]
|
|
framework = "MITRE ATT&CK"
|
|
[[rule.threat.technique]]
|
|
id = "T1562"
|
|
name = "Impair Defenses"
|
|
reference = "https://attack.mitre.org/techniques/T1562/"
|
|
[[rule.threat.technique.subtechnique]]
|
|
id = "T1562.001"
|
|
name = "Disable or Modify Tools"
|
|
reference = "https://attack.mitre.org/techniques/T1562/001/"
|
|
|
|
|
|
|
|
[rule.threat.tactic]
|
|
id = "TA0005"
|
|
name = "Defense Evasion"
|
|
reference = "https://attack.mitre.org/tactics/TA0005/"
|
|
[[rule.threat]]
|
|
framework = "MITRE ATT&CK"
|
|
[[rule.threat.technique]]
|
|
id = "T1547"
|
|
name = "Boot or Logon Autostart Execution"
|
|
reference = "https://attack.mitre.org/techniques/T1547/"
|
|
[[rule.threat.technique.subtechnique]]
|
|
id = "T1547.006"
|
|
name = "Kernel Modules and Extensions"
|
|
reference = "https://attack.mitre.org/techniques/T1547/006/"
|
|
|
|
|
|
|
|
[rule.threat.tactic]
|
|
id = "TA0003"
|
|
name = "Persistence"
|
|
reference = "https://attack.mitre.org/tactics/TA0003/"
|
|
|