shashank-elastic
85 lines
3.1 KiB
TOML
85 lines
3.1 KiB
TOML
[metadata]
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creation_date = "2021/12/12"
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integration = ["system", "windows"]
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maturity = "production"
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min_stack_comments = "New fields added: required_fields, related_integrations, setup"
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min_stack_version = "8.3.0"
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updated_date = "2023/10/23"
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[rule]
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author = ["Elastic"]
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description = """
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Identifies a suspicious computer account name rename event, which may indicate an attempt to exploit CVE-2021-42278 to
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elevate privileges from a standard domain user to a user with domain admin privileges. CVE-2021-42278 is a security
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vulnerability that allows potential attackers to impersonate a domain controller via samAccountName attribute spoofing.
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"""
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from = "now-9m"
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index = ["winlogbeat-*", "logs-system.*", "logs-windows.*"]
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language = "eql"
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license = "Elastic License v2"
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name = "Potential Privileged Escalation via SamAccountName Spoofing"
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references = [
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"https://support.microsoft.com/en-us/topic/kb5008102-active-directory-security-accounts-manager-hardening-changes-cve-2021-42278-5975b463-4c95-45e1-831a-d120004e258e",
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"https://cloudbrothers.info/en/exploit-kerberos-samaccountname-spoofing/",
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"https://github.com/cube0x0/noPac",
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"https://twitter.com/exploitph/status/1469157138928914432",
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"https://exploit.ph/cve-2021-42287-cve-2021-42278-weaponisation.html",
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]
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risk_score = 73
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rule_id = "bdcf646b-08d4-492c-870a-6c04e3700034"
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setup = """
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If enabling an EQL rule on a non-elastic-agent index (such as beats) for versions <8.2,
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events will not define `event.ingested` and default fallback for EQL rules was not added until version 8.2.
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Hence for this rule to work effectively, users will need to add a custom ingest pipeline to populate
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`event.ingested` to @timestamp.
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For more details on adding a custom ingest pipeline refer - https://www.elastic.co/guide/en/fleet/current/data-streams-pipeline-tutorial.html
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"""
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severity = "high"
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tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Persistence", "Tactic: Privilege Escalation", "Use Case: Active Directory Monitoring", "Data Source: Active Directory", "Use Case: Vulnerability"]
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timestamp_override = "event.ingested"
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type = "eql"
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query = '''
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iam where event.action == "renamed-user-account" and
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/* machine account name renamed to user like account name */
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winlog.event_data.OldTargetUserName : "*$" and not winlog.event_data.NewTargetUserName : "*$"
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'''
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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[[rule.threat.technique]]
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id = "T1068"
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name = "Exploitation for Privilege Escalation"
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reference = "https://attack.mitre.org/techniques/T1068/"
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[[rule.threat.technique]]
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id = "T1078"
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name = "Valid Accounts"
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reference = "https://attack.mitre.org/techniques/T1078/"
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[[rule.threat.technique.subtechnique]]
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id = "T1078.002"
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name = "Domain Accounts"
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reference = "https://attack.mitre.org/techniques/T1078/002/"
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[rule.threat.tactic]
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id = "TA0004"
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name = "Privilege Escalation"
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reference = "https://attack.mitre.org/tactics/TA0004/"
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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[[rule.threat.technique]]
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id = "T1098"
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name = "Account Manipulation"
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reference = "https://attack.mitre.org/techniques/T1098/"
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[rule.threat.tactic]
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id = "TA0003"
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name = "Persistence"
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reference = "https://attack.mitre.org/tactics/TA0003/"
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