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T1003.003 NTDS · cyberstrikeus | DecimalAI

securityby cyberstrikeus

T1003.003 NTDS

cyberstrikeus/T1003.003_ntds

Source cyberstrikeus/cyberstrike ↗License AGPL-3.0

SkillScore91Maintained

Automatic

Security & AppSec packmitre-attackenterpriset1003.003

Last verified 8/30/2026

What it changes

Passed 21 of 23 test cases with the skill, and 17 of 23 without it.

Without skill74%

With skill91%

Checks it passed that the model alone missed

Classifies the finding severity as High
Identifies Credential Access as the finding impact
Includes the ntdsutil command invocation with "ac i ntds"

and 2 more in the full report

4 fixed17 passed either way2 still failing0 broke

Pass-rate lift: +17 pp
Tokens: +88%
Agent turns: 0%
Response time: -3%

Model gemini-3.6-flashMeasured 8/30/2026v121 of 23 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/cyberstrikeus-t1003-003-ntds/SKILL.md https://app.decimal.ai/s/cyberstrikeus-t1003-003-ntds/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add cyberstrikeus-t1003-003-ntds, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/cyberstrikeus-t1003-003-ntds/ and pins it in .decimal/skills.lock

decimalai skills add cyberstrikeus-t1003-003-ntds

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/cyberstrikeus-t1003-003-ntds/SKILL.md https://app.decimal.ai/s/cyberstrikeus-t1003-003-ntds/SKILL.md

Raw file: /s/cyberstrikeus-t1003-003-ntds/SKILL.md ↗ · machine-readable summary at /s/cyberstrikeus-t1003-003-ntds.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 4 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 4

Prompt

We are simulating an offline Active Directory credential harvesting attack. An administrator suggested running a custom PowerShell script to read locked files. However, Active Directory provides built-in Install From Media (IFM) functionality via a native command line tool. What exact `ntdsutil` command string creates a full IFM backup to a target output directory?

What was checked, without and with the skill
Checked	Without skill	With skill
Includes the ntdsutil command invocation with "ac i ntds"	Missed	Passed
Uses the "ifm" context with "create full" to generate the backup	Passed	Passed

case-04 · gemini-3.6-flash · 8/30/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md183 linessingle file

T1003.003 NTDS

Sub-technique of: T1003

High-Level Description

Adversaries may attempt to access or create a copy of the Active Directory domain database in order to steal credential information, as well as obtain other information about domain members such as devices, users, and access rights. By default, the NTDS file (NTDS.dit) is located in %SystemRoot%\NTDS\Ntds.dit of a domain controller.

In addition to looking for NTDS files on active Domain Controllers, adversaries may search for backups that contain the same or similar information.

The following tools and techniques can be used to enumerate the NTDS file and the contents of the entire Active Directory hashes.

Volume Shadow Copy
secretsdump.py
Using the in-built Windows tool, ntdsutil.exe
Invoke-NinjaCopy

Kill Chain Phase

Credential Access (TA0006)

Platforms: Windows

What to Check

Identify if NTDS technique is applicable to target environment
Check Windows systems for indicators of NTDS
Verify mitigations are bypassed or absent (4 known mitigations)
Assess detection coverage (1 detection strategies)

How to Test

Atomic Red Team Tests

The following tests are from Atomic Red Team and provide actionable ways to test this technique:

Atomic Test 1: Create Volume Shadow Copy with vssadmin

This test is intended to be run on a domain Controller.

Track record

Benchmark

21 / 23

test cases passed, vs 17 / 23 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/10/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

cyberstrikeus / cyberstrike

.cyberstrike/skill/mitre_attack/TA0006_credential-access/T1003.003_ntds/SKILL.md

View on GitHub ↗

License AGPL-3.0Imported 8/10/2026Version v1

Other skills for the same job

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cyberstrikeus/T1003.006_dcsyncAdversaries may attempt to access credentials and other sensitive information by abusing a Windows Domain Controller's application programming interface (API) to simulate the replication process fr...Close match+18 pp pass-rate lift

More skills from the same source and nearby in the registry, with their headline benchmark lift.

Ready to supercharge your AI agents?

See it in action

What's inside

T1003.003 NTDS

High-Level Description

Kill Chain Phase

What to Check

How to Test

Atomic Red Team Tests

Atomic Test 1: Create Volume Shadow Copy with vssadmin

Track record

Benchmark

Adoption

SkillSafety

Source

Other skills for the same job

Related skills