Bin Triage
Fast format-agnostic first look at any file, pure-stdlib: identify format from magic bytes (and route to the right analyzer), chunked Shannon entropy (packed/encrypted regions), string extraction with interesting-string surfacing (URLs/IPs/onion/shell/paths/exec-APIs), and an embedded-signature scan (mini-binwalk: ZIP/gzip/ELF/PDF at non-zero offsets). When given an output dir, also CARVES large…
Install
$ agentstack add skill-batteryshark-rekit-bin-triage ✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.
Security review
✓ PassedNo issues found. Passed automated security review. · v0.1.0 How review works →
- ✓ Prompt-injection patterns
- ✓ Secret / credential exfiltration
- ✓ Dangerous shell & filesystem operations
- ✓ Untrusted network calls
- ✓ Known-malicious package signatures
What it can access
- ✓ Network access No
- ✓ Filesystem access No
- ✓ Shell / process execution No
- ✓ Environment & secrets No
- ✓ Dynamic code execution No
From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.
Verified badge
Passed review? Show it. Paste this badge into your README, it links to the public security report.
Links to your public security report.[](https://agentstack.voostack.com/security/report/skill-batteryshark-rekit-bin-triage) Reliability & compatibility
Declared compatibility
Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.
We're building live execution health for every listing: tool-call success rate, median latency, uptime, and last-checked timestamps, measured, not self-reported. It isn't live yet, so we don't show numbers we can't stand behind.
How agent discovery & health will work →About
Binary Triage (format-agnostic)
A fast first look at any file, with no external tools. Pure-Python stdlib, read-only. Use it when you don't yet know what you're holding.
When to use
An unknown blob shows up — a dropped file, an attachment, a chunk carved out of something bigger. Run this to learn what it is and where to look next; it routes you to the format-specific analyzer (pe-analyze, elf-analyze, macho-analyze, dotnet-analyze) or to unpack for archives.
What it does
- Identify — format from magic bytes (ELF/PE/Mach-O/DEX/WASM, ZIP/gzip/xz/7z/
RAR/CAB/zstd/tar, PDF/PNG/JPEG, scripts) and a route to the right skill.
- Entropy — Shannon entropy in 4 KiB chunks → flags packed/encrypted/compressed
regions (BINARY.HIGH_ENTROPY, with the % of the file and first offset).
- Strings — ASCII + UTF-16LE, surfacing interesting ones: URLs, IPs,
.onion
addresses, shell/exec cues (/bin/sh, cmd.exe, powershell), Windows paths, and exec/inject API names (BINARY.INTERESTING_STRING).
- Embedded scan — a lightweight mini-binwalk: known signatures (ZIP, gzip,
xz, 7z, ELF, PDF, PNG, zstd) found at non-zero offsets → BINARY.EMBEDDED. For actual carving/extraction of embedded filesystems use binwalk-carve.
Strictly read-only — reads bytes only, never parses as code or executes.
Usage
rekit run bin-triage ./unknown.bin
rekit run bin-triage ./firmware.img --format jsonPrerequisites
- python3 ≥ 3.8 — pure stdlib, nothing to vendor.
Source & license
This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.
- Author: batteryshark
- Source: batteryshark/rekit
- License: Apache-2.0
Install and usage instructions live in the source repository linked above.
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Versions
- v0.1.0 Imported from the upstream source.