# Attack Ent T1213 003 Code Repositories

> Analyze MITRE ATT&CK T1213.003 Code Repositories in the enterprise matrix. Use for TTP triage, detection engineering, hunting, defensive emulation planning, mitigations, incident response mapping, ATT&CK coverage, or questions mentioning T1213.003, Code Repositories, or enterprise ATT&CK. Adversaries may leverage code repositories to collect valuable information.

- Skill: `santosomar/attack-ent-t1213-003-code-repositories` (Agent Skill, multi-file: 11 files)
- Install (CLI): `npx skillmds@latest add santosomar/attack-ent-t1213-003-code-repositories`
- Raw SKILL.md: https://api.skillmd.com/api/skills/santosomar/attack-ent-t1213-003-code-repositories/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- License: MITRE ATT&CK Terms of Use apply to ATT&CK-derived content. See h
- Author: santosomar (https://skillmd.com/u/santosomar)
- Updated: 2026-09-22
- Page: https://skillmd.com/skills/santosomar/attack-ent-t1213-003-code-repositories

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# MITRE ATT&CK T1213.003: Code Repositories

## When to use this skill

Use this skill when the task involves T1213.003, Code Repositories, enterprise ATT&CK, TTP mapping, detection engineering, hunting, incident-response enrichment, control validation, or authorized adversary-emulation planning. Treat it as a defensive analysis aid: keep outputs focused on understanding, detecting, mitigating, and safely validating this ATT&CK sub-technique.

## Technique context

- ATT&CK domain: enterprise
- ATT&CK ID: T1213.003
- Technique name: Code Repositories
- Type: sub-technique
- ATT&CK URL: https://attack.mitre.org/techniques/T1213/003
- Tactics: collection
- Platforms: SaaS
- Required permissions: Not specified
- Effective permissions: Not specified
- Defenses bypassed: Not specified

## ATT&CK description

Adversaries may leverage code repositories to collect valuable information. Code repositories are tools/services that store source code and automate software builds. They may be hosted internally or privately on third party sites such as Github, GitLab, SourceForge, and BitBucket. Users typically interact with code repositories through a web application or command-line utilities such as git.

Once adversaries gain access to a victim network or a private code repository, they may collect sensitive information such as proprietary source code or [Unsecured Credentials](https://attack.mitre.org/techniques/T1552) contained within software's source code.  Having access to software's source code may allow adversaries to develop [Exploits](https://attack.mitre.org/techniques/T1587/004), while credentials may provide access to additional resources using [Valid Accounts](https://attack.mitre.org/techniques/T1078).(Citation: Wired Uber Breach)(Citation: Krebs Adobe)

**Note:** This is distinct from [Code Repositories](https://attack.mitre.org/techniques/T1593/003), which focuses on conducting [Reconnaissance](https://attack.mitre.org/tactics/TA0043) via public code repositories.

## Agent workflow

1. Clarify scope: identify the system, asset class, log sources, cloud or endpoint platform, and whether the user wants triage, detection, coverage assessment, or safe emulation planning.
2. Load bundled resources as needed: use `references/technique-profile.json` for structured metadata, `references/detection-and-mitigation.md` for triage and telemetry guidance, `references/known-threat-context.md` for ATT&CK relationship context, and `templates/` for repeatable outputs.
3. Map observations to ATT&CK: compare the user's evidence to the ATT&CK description, tactics, platforms, and known procedure patterns before asserting a match.
4. Produce defensive outputs: prioritize hypotheses, telemetry requirements, detection logic ideas, validation steps, containment guidance, and mitigations.
5. Preserve uncertainty: distinguish confirmed evidence, plausible indicators, assumptions, and gaps. Recommend what to collect next.
6. Stay safe: do not provide malware, credential theft, persistence, evasion, destructive automation, or unauthorized exploitation instructions. For adversary emulation, keep steps bounded to approved lab or control-validation contexts and omit operational abuse details.

## Bundled resources

- `references/technique-profile.json`: machine-readable ATT&CK metadata for this technique.
- `references/detection-and-mitigation.md`: detection notes, telemetry checklist, triage questions, mitigation candidates, and false-positive considerations.
- `references/known-threat-context.md`: ATT&CK relationship context with attribution cautions.
- `templates/detection-brief.md`: detection engineering brief template.
- `templates/hunt-plan.md`: threat hunt plan template.
- `templates/incident-response-note.md`: incident response note template.
- `templates/coverage-assessment.md`: ATT&CK coverage assessment template.
- `scripts/render_brief.py`: local helper that renders a Markdown defensive brief from `technique-profile.json`.
- `assets/output-schema.json`: JSON schema for structured technique analysis outputs.

To generate a quick brief, run `python scripts/render_brief.py --output brief.md` from inside this skill directory, or adapt the templates directly.

## Detection guidance

No ATT&CK detection guidance was present in the source STIX object.

## Useful telemetry and data sources

- Not specified in the STIX object.

## Mitigations to consider

- Audit
- Multi-factor Authentication
- User Account Management
- User Training

## Known threat context

Use these examples only as contextual leads, not as proof that an observed event is this technique:

- APT41 (intrusion-set)
- GlassWorm (malware)
- LAPSUS$ (intrusion-set)
- Scattered Spider (intrusion-set)
- Shai-Hulud (malware)
- SolarWinds Compromise (campaign)
- TruffleHog (tool)

## Recommended output pattern

When responding with this skill, structure the answer as:

- Assessment: whether the evidence supports this ATT&CK mapping and why.
- Evidence: specific indicators, logs, behaviors, and assumptions.
- Detection: telemetry sources, analytic logic, and tuning considerations.
- Response: containment, eradication, recovery, and validation actions.
- Coverage gaps: missing logs, sensors, controls, or environmental details.
- References: include the ATT&CK URL and any user-provided evidence references.

## ATT&CK contributors

- Itamar Mizrahi, Cymptom
- Toby Kohlenberg
- Josh Liburdi, @jshlbrd