About

Imported from mukul975/anthropic-cybersecurity-skills (skills/performing-active-directory-forest-trust-attack/SKILL.md). Install upstream with npx skills add mukul975/anthropic-cybersecurity-skills --skill performing-active-directory-forest-trust-attack. Copyright stays with the author (Apache-2.0).

Performing Active Directory Forest Trust Attack

Name: performing-active-directory-forest-trust-attack
Author: mukul975

Overview

Active Directory forest trusts enable authentication across organizational boundaries but introduce attack surface if misconfigured. This skill uses impacket to enumerate trust relationships, analyze SID filtering configuration, detect SID history abuse vectors, perform cross-forest SID lookups via LSA/LSAT RPC calls, and assess inter-realm Kerberos ticket configurations for trust ticket forgery risks.

When to Use

When conducting security assessments that involve performing active directory forest trust attack
When following incident response procedures for related security events
When performing scheduled security testing or auditing activities
When validating security controls through hands-on testing

Prerequisites

Python 3.9+ with impacket, ldap3
Domain credentials with read access to AD trust objects
Network access to Domain Controllers (ports 389, 445, 88)
Authorized penetration testing engagement or lab environment

Legal Notice: This skill is for authorized security testing and educational purposes only. Unauthorized use against systems you do not own or have written permission to test is illegal and may violate computer fraud laws.

Steps

Enumerate forest trust relationships via LDAP trusted domain objects
Query trust attributes and SID filtering status for each trust
Perform SID lookups across trust boundaries using LsarLookupNames3
Enumerate foreign security principals in trusted domains
Check for SID history on cross-forest accounts
Assess trust direction and transitivity for lateral movement paths
Generate trust security audit report with risk findings

Expected Output

JSON report listing all trust relationships, SID filtering status, foreign principals, trust direction/transitivity, and risk assessment
Cross-forest attack path analysis with remediation recommendations

Use it

Copy one of these into your project. Installing also returns the manifest and these snippets.

yaml

targets:
  - https://api.opensmartroute.ai/api/v1/registry/mukul975-anthropic-cybersecurity-skills-performing-activ-f2bb54/manifest   # or paste the manifest below

Manifest

An Open Capability Manifest: the router reads it to know what this does, what it costs and when to pick it.

mukul975-anthropic-cybersecurity-skills-performing-activ-f2bb54.ocm.jsonjson

{
  "ocm": "1",
  "id": "mukul975-anthropic-cybersecurity-skills-performing-activ-f2bb54",
  "kind": "skill",
  "name": "performing-active-directory-forest-trust-attack",
  "description": "Enumerate and audit Active Directory forest trust relationships using Impacket for SID filtering analysis, trust key extraction, cross-forest SID history abuse detection, and inter-realm Kerberos ticket assessment. Use when red-teaming multi-forest AD environments or auditing forest trusts for cross-forest privilege escalation and trust ticket forgery exposure.",
  "publisher": "mukul975",
  "version": "1.0.0",
  "capabilities": {
    "domains": [
      "customer_support"
    ],
    "tags": [
      "skill-md",
      "active-directory",
      "forest-trust",
      "impacket",
      "sid-filtering",
      "kerberos",
      "red-team",
      "trust-enumeration",
      "skills-sh"
    ],
    "languages": [
      "en"
    ]
  },
  "quality_prior": 0.6,
  "examples": [
    "Enumerate and audit Active Directory forest trust relationships using Impacket for SID filtering analysis, trust key extraction, cross-forest SID history abuse detection, and inter-realm Kerberos ticket assessment. Use when red-teaming multi-forest AD environments or auditing forest trusts for cross-forest privilege escalation and trust ticket forgery exposure."
  ],
  "primary": false,
  "metadata": {
    "source": {
      "provider": "skills.sh",
      "repository": "https://github.com/mukul975/anthropic-cybersecurity-skills",
      "path": "skills/performing-active-directory-forest-trust-attack/SKILL.md",
      "ref": "HEAD",
      "url": "https://github.com/mukul975/anthropic-cybersecurity-skills/blob/HEAD/skills/performing-active-directory-forest-trust-attack/SKILL.md",
      "key": "mukul975/anthropic-cybersecurity-skills/skills/performing-active-directory-forest-trust-attack/SKILL.md"
    },
    "license": "Apache-2.0"
  },
  "instructions": "# Performing Active Directory Forest Trust Attack\n\n## Overview\n\nActive Directory forest trusts enable authentication across organizational boundaries but introduce attack surface if misconfigured. This skill uses impacket to enumerate trust relationships, analyze SID filtering configuration, detect SID history abuse vectors, perform cross-forest SID lookups via LSA/LSAT RPC calls, and assess inter-realm Kerberos ticket configurations for trust ticket forgery risks.\n\n\n## When to Use\n\n- When conducting security assessments that involve performing active directory forest trust attack\n- When follo",
  "cost": {
    "context_tokens": 486
  }
}

Fetch it by URL: GET /api/v1/registry/mukul975-anthropic-cybersecurity-skills-performing-activ-f2bb54/manifest?version=1.0.0

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