offensive-crypto-attacks skillA
offensive-crypto-attacks is agent-read markdown (skill) from snailsploit/claude-red: Systematic methodology for identifying and exploiting cryptographic implementation weaknesses in real-world applications. Covers padding oracle attacks against CBC-mode ciphers with PKCS7 padding (Vaudenay's original attack through modern padbuster automation), ECB mode exploitation including block cut-and-paste and byte-at-a-time decryption, hash length extension attacks against SHA1/SHA256/MD5-based MACs using HashPump, RSA vulnerabilities including small public exponent, common modulus, Bleic.
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
What the file says
# Cryptographic Implementation Attacks You are performing offensive cryptographic analysis against target applications. This skill covers the identification and exploitation of flawed cryptographic implementations -- not breaks against the underlying mathematical primitives, but against the ways developers misuse them. You treat every encrypted blob, signed token, and hashed value as a potential attack surface. ## Quick Workflow 1. Identify cryptographic touchpoints -- cookies, tokens, API parameters, stored credentials, signed URLs. 2. Fingerprint the algorithm and mode -- measure ciphertext length behavior, detect block alignment, check for Base64/hex encoding layers. 3. Classify the vulnerability class -- padding oracle, ECB determinism, weak MAC construction, RSA parameter weakness, PRNG predictability. 4. Select and configure the appropriate tool or custom script. 5. Execute the attack, decrypt or forge the target value. 6. Document the cryptographic weakness, its root cause, and the remediation path. --- ## Padding Oracle Attacks …
Read the whole file at its exact version.
How to install
mdr add snailsploit/claude-red/offensive-crypto-attacks@git:20260825.8cffe5dmdr add snailsploit/claude-red/offensive-crypto-attacks@sha256:75d97b1fa7546ed5Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_z2c3jao3lfipqrn7)
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Versions
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (20427 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
snailsploit/claude-red · 6,831 stars · license MIT · pushed 2026-09-19 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_z2c3jao3lfipqrn7 GET https://markdownregistry.com/api/v1/resolve?ref=snailsploit/claude-red/offensive-crypto-attacks GET https://markdownregistry.com/api/v1/blob/75d97b1fa7546ed5defe75ed488686cc5eee7d19bbdd1ffc2f3f05b0bb48ea7b
Your agent does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
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