shashank-elastic
ae2a98e3f7
Co-authored-by: Colson Wilhoit <48036388+DefSecSentinel@users.noreply.github.com> Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>
52 lines
1.6 KiB
TOML
52 lines
1.6 KiB
TOML
[metadata]
|
|
creation_date = "2022/08/30"
|
|
maturity = "production"
|
|
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
|
|
min_stack_version = "8.3.0"
|
|
updated_date = "2022/08/30"
|
|
|
|
[rule]
|
|
author = ["Elastic"]
|
|
description = """
|
|
Identifies suspicious usage of unshare to manipulate system namespaces. Unshare can be utilized to escalate privileges
|
|
or escape container security boundaries. Threat actors have utilized this binary to allow themselves to escape to the
|
|
host and access other resources or escalate privileges.
|
|
"""
|
|
from = "now-9m"
|
|
index = ["auditbeat-*", "logs-endpoint.events.*"]
|
|
language = "eql"
|
|
license = "Elastic License v2"
|
|
name = "Namespace Manipulation Using Unshare"
|
|
references = [
|
|
"https://man7.org/linux/man-pages/man1/unshare.1.html",
|
|
"https://www.crowdstrike.com/blog/cve-2022-0185-kubernetes-container-escape-using-linux-kernel-exploit/"
|
|
]
|
|
risk_score = 47
|
|
rule_id = "d00f33e7-b57d-4023-9952-2db91b1767c4"
|
|
severity = "medium"
|
|
tags = ["Elastic", "Host", "Linux", "Threat Detection", "Privilege Escalation"]
|
|
timestamp_override = "event.ingested"
|
|
type = "eql"
|
|
|
|
query = '''
|
|
process where event.type == "start" and event.action == "exec" and
|
|
process.executable: "/usr/bin/unshare" and
|
|
not process.parent.executable: ("/usr/bin/udevadm", "*/lib/systemd/systemd-udevd", "/usr/bin/unshare") and
|
|
not process.args : "/usr/bin/snap"
|
|
'''
|
|
|
|
|
|
[[rule.threat]]
|
|
framework = "MITRE ATT&CK"
|
|
[[rule.threat.technique]]
|
|
id = "T1543"
|
|
name = "Create or Modify System Process"
|
|
reference = "https://attack.mitre.org/techniques/T1543/"
|
|
|
|
|
|
[rule.threat.tactic]
|
|
id = "TA0004"
|
|
name = "Privilege Escalation"
|
|
reference = "https://attack.mitre.org/tactics/TA0004/"
|
|
|