2fa-bypass

2fa-bypass is a skill for Claude Code, Codex from blacklanternsecurity/red-run. It costs 21 tokens per session (4,213 once invoked), scanned A, original, GPL-3.0.

A security-testing technique for getting past two-factor authentication, which normally requires a second proof of identity after a password.

In plain words
What is it for?
Authorized penetration tests of two-factor or multi-factor authentication controls.
Why use it?
It can be used to test whether an approved security assessment can defeat an account’s extra login protection.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/blacklanternsecurity/red-run/2fa-bypass
Any agent
npx skills add blacklanternsecurity/red-run --skill 2fa-bypass
Clone the repo
git clone --depth 1 https://github.com/blacklanternsecurity/red-run

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for 2fa-bypass

README.md
[![agentmods](https://agentmods.dev/badge/skills/blacklanternsecurity/red-run/2fa-bypass.svg)](https://agentmods.dev/skills/blacklanternsecurity/red-run/2fa-bypass)
Your own site
<a href="https://agentmods.dev/skills/blacklanternsecurity/red-run/2fa-bypass"><img src="https://agentmods.dev/badge/skills/blacklanternsecurity/red-run/2fa-bypass.svg" alt="Measured on agentmods" height="20"></a>
Per session 21 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,213 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00021 $0.04213
Opus 5 $0.00010 $0.02107
Sonnet 5 $0.00004 $0.00843
Haiku 4.5 $0.00002 $0.00421

Measured 4d ago against content hash 0653a5f35bcb, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

2fa-bypass scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- curl
skills/web/2fa-bypass/SKILL.md · 562 lines

The source is not reproduced here

Licensed GPL-3.0

The repository is licensed GPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 4d ago First seen · 562 lines · 21 tokens per session scan A 0653a5f35bcb

Subscribe to this mod's changes

2fa-bypass is a skill published in the GitHub repository blacklanternsecurity/red-run (266 stars, last pushed 5mo ago), licensed GPL-3.0. It adds 21 tokens to every session and 4,213 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Related

Other skills, from other repositories

api-rate-limit-bypass-techniques

Identify and exploit flaws in API rate limiting enforcement. Use this skill when encountering HTTP 429 Too Many Requests errors during password brute-forcing, OTP validation, credential stuffing, or enumeration attacks. These bypasses leverage IP spoofing, parameter manipulation, and edge-case application logic.

ShulkwiSEC/bb-huge · 66 tokens

api-rate-limit-bypass-techniques

Identify and exploit flaws in API rate limiting enforcement. Use this skill when encountering HTTP 429 Too Many Requests errors during password brute-forcing, OTP validation, credential stuffing, or enumeration attacks. These bypasses leverage IP spoofing, parameter manipulation, and edge-case application logic.

akashrpatil/awesome-offensive-security-skills · 66 tokens

attacking-oauth-with-device-code-phishing

Run OAuth 2.0 device-code and illicit-consent phishing attacks against Microsoft Entra ID, using TokenTactics-style tooling to steal access and refresh tokens, bypass MFA, and pivot across Microsoft 365 services. Use for authorized red-team engagements simulating device-code or consent-grant phishing against a tenant…

Youngmaidainon/Agent-Level-Up · 80 tokens

systematic-debugging

Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes.

obra/superpowers · 21 tokens

brainstorming

You MUST use this before any creative work - creating features, building components, adding functionality, or modifying behavior. Explores user intent, requirements and design before implementation.

obra/superpowers · 37 tokens

auto-perf-optimize

Run agent-driven VS Code performance or memory investigations. Use when asked to launch Code OSS, automate a VS Code scenario, run the Chat memory smoke runner, capture renderer heap snapshots, take workflow screenshots, compare run summaries, or drive a repeatable scenario before heap-snapshot analysis.

microsoft/vscode · 62 tokens