Skip to content

[New Rule] Potential ADIDNS Poisoning via Wildcard Record Creation #3535

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 4 commits into from
Mar 27, 2024
Merged
Changes from all commits
Commits
File filter

Filter by extension

Filter by extension

Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
82 changes: 82 additions & 0 deletions rules/windows/credential_access_adidns_wildcard.toml
Original file line number Diff line number Diff line change
@@ -0,0 +1,82 @@
[metadata]
creation_date = "2024/03/26"
integration = ["system", "windows"]
maturity = "production"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.3.0"
updated_date = "2024/03/26"

[rule]
author = ["Elastic"]
description = """
Active Directory Integrated DNS (ADIDNS) is one of the core components of AD DS, leveraging AD's access control and
replication to maintain domain consistency. It stores DNS zones as AD objects, a feature that, while robust, introduces
some security issues, such as wildcard records, mainly because of the default permission (Any authenticated users) to
create DNS-named records. Attackers can create wildcard records to redirect traffic that doesn't explicitly match
records contained in the zone, becoming the Man-in-the-Middle and being able to abuse DNS similarly to LLMNR/NBNS spoofing.
"""
from = "now-9m"
index = ["winlogbeat-*", "logs-system.*", "logs-windows.*"]
language = "eql"
license = "Elastic License v2"
name = "Potential ADIDNS Poisoning via Wildcard Record Creation"
references = [
"https://www.netspi.com/blog/technical/network-penetration-testing/exploiting-adidns/",
"https://www.thehacker.recipes/a-d/movement/mitm-and-coerced-authentications/adidns-spoofing"
]
risk_score = 73
rule_id = "8f242ffb-b191-4803-90ec-0f19942e17fd"
setup = """## Setup

The 'Audit Directory Service Changes' logging policy must be configured for (Success, Failure).
Steps to implement the logging policy with Advanced Audit Configuration:

```
Computer Configuration >
Policies >
Windows Settings >
Security Settings >
Advanced Audit Policies Configuration >
Audit Policies >
DS Access >
Audit Directory Service Changes (Success,Failure)
```

The above policy does not cover the target object by default (we still need it to be configured to generate events), so we need to set up an AuditRule using https://github.com/OTRF/Set-AuditRule.

```
Set-AuditRule -AdObjectPath 'AD:\\CN=MicrosoftDNS,DC=DomainDNSZones,DC=Domain,DC=com' -WellKnownSidType WorldSid -Rights CreateChild -InheritanceFlags Descendents -AttributeGUID e0fa1e8c-9b45-11d0-afdd-00c04fd930c9 -AuditFlags Success
```
"""
severity = "high"
tags = [
"Domain: Endpoint",
"OS: Windows",
"Use Case: Threat Detection",
"Tactic: Credential Access",
"Data Source: Active Directory",
"Use Case: Active Directory Monitoring"
]
timestamp_override = "event.ingested"
type = "eql"

query = '''
any where host.os.type == "windows" and event.action == "Directory Service Changes" and
event.code == "5137" and startsWith(winlog.event_data.ObjectDN, "DC=*,")
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1557"
name = "Adversary-in-the-Middle"
reference = "https://attack.mitre.org/techniques/T1557/"



[rule.threat.tactic]
id = "TA0006"
name = "Credential Access"
reference = "https://attack.mitre.org/tactics/TA0006/"