T1003.005 Cached Domain Credentials Agent Skill

Adversaries may attempt to access cached domain credentials used to allow authentication to occur in the event a domain controller is…

Context cost
1.6k tokensestimated from the bundle, loaded when it triggers
Bundle
1 file · 6.4 kBtext throughout, nothing executable
Licence
GPL-3.0the author’s own terms
Last change
—v18.1
Servers it uses
Noneruns standalone

What it does

Adversaries may attempt to access cached domain credentials used to allow authentication to occur in the event a domain controller is unavailable.

What this skill changes about the agent has not been set out here as a list. Its SKILL.md, shown below, says it in the author’s own words.

credential-accessenterpriselinuxmitre-attacksecuritysub-techniquet1003005windows

The skill itself

A skill is instructions the model reads, so you can see what you are getting: below is the start of its SKILL.md. The front matter loads with every session, the body loads when the skill triggers, and the whole file comes with the install.

SKILL.md6.4 kB · preview
--- name: "T1003.005_cached-domain-credentials" category: "authentication" version: "18.1" author: "cyberstrike-official" tags: - mitre-attack - enterprise - t1003.005 - credential-access - windows - linux - sub-technique technique_id: "T1003.005" tactic: "credential-access" all_tactics: - credential-access platforms: - Windows - Linux mitre_url: "https://attack.mitre.org/techniques/T1003/005" tech_stack: - windows - linux cwe_ids: - CWE-522 chains_with: - T1003 - T1003.001 - T1003.002 - T1003.003 - T1003.004 - T1003.006 - T1003.007 - T1003.008 prerequisites: - T1003 severity_boost: T1003: "Chain with T1003 for deeper attack path" T1003.001: "Chain with T1003.001 for deeper attack path" T1003.002: "Chain with T1003.002 for deeper attack path" ---
45# T1003.005 Cached Domain Credentials
46
47> **Sub-technique of:** T1003
48
49## High-Level Description
50
51Adversaries may attempt to access cached domain credentials used to allow authentication to occur in the event a domain controller is unavailable.
52
53On Windows Vista and newer, the hash format is DCC2 (Domain Cached Credentials version 2) hash, also known as MS-Cache v2 hash. The number of default cached credentials varies and can be altered per system. This hash does not allow pass-the-hash style attacks, and instead requires Password Cracking to recover the plaintext password.
54
55On Linux systems, Active Directory credentials can be accessed through caches maintained by software like System Security Services Daemon (SSSD) or Quest Authentication Services (formerly VAS). Cached credential hashes are typically located at /var/lib/sss/db/cache.[domain].ldb for SSSD or /var/opt/quest/vas/authcache/vas_auth.vdb for Quest. Adversaries can use utilities, such as tdbdump, on these database files to dump the cached hashes and use Password Cracking to obtain the plaintext password.
56
57With SYSTEM or sudo access, the tools/utilities such as Mimikatz, Reg, and secretsdump.py for Windows or Linikatz for Linux can be used to extract the cached credentials.
58
59Note: Cached credentials for Windows Vista are derived using PBKDF2.
60
61## Kill Chain Phase
62
63- Credential Access (TA0006)
This is a preview of SKILL.md. Download or install the skill to get the whole thing.
In the file
SKILL.md776 words
Files1
LicenceGPL-3.0
Why you can read it

Nothing in a skill executes. The client loads the text and the model follows it, so a skill can be audited the way a runbook is — by reading it.

What it costs in context

Skills are not billed by the call. They are paid for in context: every token the instructions occupy is a token your code, your diff and your conversation cannot use. Here is what this one takes and when it takes it.

≈240
always loaded
The name and description, so the model knows the skill exists and when to reach for it.
1,360
on trigger
The instruction body, read only when the skill fires.
0.80%
of a 200k window
Ten skills this size would take about 8% of the window before you open a file.
050k100k150k200k context window

1.6k tokens, estimated from the bundle at four bytes to the token, held for the rest of the session once it triggers. Middling. Fine to keep on in a project where you use it weekly, worth unloading in one where you never do.

Servers bill, skills cost

A server charges by the month. A skill charges once per session, in context, and then keeps charging it for as long as the session lives.

Before and after

The same question, put to the same model twice: once as it comes, and once with these instructions loaded.

No worked example has been published for this skill yet.

The procedure it runs

The procedure has not been set out here step by step. It is in the body of its SKILL.md: the start of it is shown above, and the whole file comes with the install.

Prose, not code

These steps are written for a model to follow, not executed by a runtime. It can still be told to skip one, and it will say so when it does.

Servers it uses

None. This skill calls no MCP servers at all.

Everything it needs is in the instructions, so it works in a project with nothing connected — the model reads the file and changes how it works with what it can already reach.

Its SKILL.md does not declare which tools it asks the agent for, so what it touches is whatever the instructions themselves ask for — read them before you install it.

What it asks for
Writes filesnot declared
Network accessnot declared

This SKILL.md carries no allowed-tools line, so neither is declared. A skill grants no permissions of its own — it can only ask for tools your client already has.

What it will not do

Every skill is narrow, and the useful ones say where they stop. These are the jobs this one is the wrong tool for.

What this skill is not for has not been published here. Nothing is implied by that: it is a section the author has not filled in.

What is in the bundle

1 file, 6.4 kB on disk. A bundle is text throughout: the instructions the model reads, plus the templates it fills in.

  • SKILL.md6.4 kB
What is not in it

No dependencies and nothing executable: a skill is text the agent reads, so the bundle is 1 file you can review in full before installing. The GPL-3.0 licence covers the templates and examples as well as the instructions.

Install

Installing copies the bundle into your project. Nothing runs at install time — the files sit on disk until the model reads them.

# T1003.005 Cached Domain Credentials · 1.6k tokens when loaded · macOS, Linux mkdir -p .claude/skills && t=$(mktemp -d) && curl -fsSL -o "$t/bundle.tar.gz" https://mcprush.com/api/skills/t1003-005-cached-domain-credentials/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/t1003-005-cached-domain-credentials" ] && { [ ! -e .claude/skills/t1003-005-cached-domain-credentials ] || { mv .claude/skills/t1003-005-cached-domain-credentials "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/t1003-005-cached-domain-credentials" .claude/skills/ && echo "Installed .claude/skills/t1003-005-cached-domain-credentials"
On Windows, or any OS with Node 20+
npx mcprush@latest skill add cyberstrikeus/t1003-005-cached-domain-credentials

Windows PowerShell says 'running scripts is disabled on this system'? Run Set-ExecutionPolicy -Scope CurrentUser RemoteSigned once, or type npx.cmd instead of npx (codex.cmd, gemini.cmd, grok.cmd likewise). PowerShell 7 needs neither. Writes to .claude/skills/t1003-005-cached-domain-credentials/ in the current project. For every project instead, run mkdir -p ~/.claude/skills && t=$(mktemp -d) && curl -fsSL -o "$t/bundle.tar.gz" https://mcprush.com/api/skills/t1003-005-cached-domain-credentials/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/t1003-005-cached-domain-credentials" ] && { [ ! -e ~/.claude/skills/t1003-005-cached-domain-credentials ] || { mv ~/.claude/skills/t1003-005-cached-domain-credentials "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/t1003-005-cached-domain-credentials" ~/.claude/skills/ && echo "Installed ~/.claude/skills/t1003-005-cached-domain-credentials" (macOS, Linux) — or add --global to the npx line. The curl line replaces .claude/skills/t1003-005-cached-domain-credentials/ only after the download succeeds, so files left there by another skill of the same name, or by an older release, do not mix in. A copy already there is moved aside, not deleted, and the line prints where. It appears as T1003.005_cached-domain-credentials in Gemini CLI, Codex, Copilot and Grok (its own name); Claude Code lists it by the folder name, t1003-005-cached-domain-credentials.

Which clients pick it up on their own

A skill is a folder of text. Most of these read a skills folder and pick it up without being told; the rest take the same folder another way — an upload in the app, a parameter on an API call — and then choose it by its description just the same.

Claude Code.claude/skills/
Claude DesktopCustomize › Skills
ChatGPTSkills › Create › Upload
Cursor.cursor/skills/
VS Code.github/skills/
Codex CLI.agents/skills/
Gemini CLI.gemini/skills/
Grok Build.grok/skills/
Microsoft CopilotSkills › Upload a skill
PerplexityComputer › Skills › Upload a skill
DeepSeek Harness.dsh/skills/
Zed.agents/skills/
Devin Desktop.devin/skills/
Windsurf (legacy).windsurf/skills/
OpenAI Agents SDKInstructions or sandbox Skills
HTTP / APIa request parameter
This release
Version18.1
Publishedno release date on file
PriceFree
Referencecyberstrikeus/t1003-005-cached-domain-credentials

Versions

v18.1 is what is on the shelf; no release here carries a date. Instructions change more often than APIs do — a skill can be rewritten entirely without anything it depends on moving.

v18.1
  • No earlier releases have been published to the marketplace.
Pinning

The install command always fetches the release that is current the day you run it — v18.1 today — and cannot ask for an earlier one. The copy on your disk does not change until you run it again.

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