performing-static-pe-analysis

performing-static-pe-analysis is a skill for Claude Code, Codex from meltedinhex/analyst-ai-pack. It costs 64 tokens per session (860 once invoked), scanned A, original, Apache-2.0.

A static-analysis guide for Windows PE files, the executable format used by EXE and DLL files. It examines headers, sections, imports, exports, resources, entropy, and embedded strings without running the file.

In plain words
What is it for?
Use it to inspect EXE or DLL metadata, spot suspicious imports or packed sections, and gather features for YARA rules.
Why use it?
It gives analysts clues about a program's structure, capabilities, and possible packing before detonation. This is useful when execution is unsafe or when preparing detection rules.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to inspect EXE or DLL metadata, spot suspicious imports or packed sections, and gather features for YARA rules.

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Install with agentmods
npx agentmods add skills/meltedinhex/analyst-ai-pack/performing-static-pe-analysis
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.

Any agent
npx skills add meltedinhex/analyst-ai-pack --skill performing-static-pe-analysis
Clone the repo
git clone --depth 1 https://github.com/meltedinhex/analyst-ai-pack

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 performing-static-pe-analysis

README.md
[![agentmods](https://agentmods.dev/badge/skills/meltedinhex/analyst-ai-pack/performing-static-pe-analysis.svg)](https://agentmods.dev/skills/meltedinhex/analyst-ai-pack/performing-static-pe-analysis)
Your own site
<a href="https://agentmods.dev/skills/meltedinhex/analyst-ai-pack/performing-static-pe-analysis"><img src="https://agentmods.dev/badge/skills/meltedinhex/analyst-ai-pack/performing-static-pe-analysis.svg" alt="Measured on agentmods" height="20"></a>
Per session 64 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 860 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original 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 5.1 $0.00064 $0.00860
Opus 5 $0.00032 $0.00430
Sonnet 5 $0.00013 $0.00172
Haiku 4.5 $0.00006 $0.00086

Measured 4d ago against content hash a99440482b3c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

performing-static-pe-analysis scanned grade A with 0 findings 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.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/analyst.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/performing-static-pe-analysis/SKILL.md · 115 lines

How it starts

The opening of the file, as written. The whole thing — 115 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Performing Static PE Analysis

When to Use

  • You have a Windows executable or DLL and need to infer its capabilities before (or instead of) detonation.
  • You want to assess packing, suspicious imports, timestamps, and embedded resources.
  • You are gathering features for YARA authoring or detection.

Do not use import tables alone to conclude behavior — packed samples hide imports until runtime. If imports are sparse and entropy is high, move to unpacking.

Prerequisites

  • pefile (pip install pefile) and optionally capa/PEStudio for deeper capability ID.
  • The sample in neutralized form inside the lab.

Safety & Handling

  • Static only: parse the file, never run it. Keep the neutralized extension.

Workflow

Step 1: Parse headers and metadata

python scripts/analyst.py analyze sample.bin

Note the compile timestamp (often forged), subsystem (GUI/console), machine type (x86/x64), and whether it is a DLL.

Step 2: Review sections and entropy

Per-section entropy reveals packing. A tiny .text plus a huge high-entropy section, or non-standard section names (UPX0, .themida), indicate a packer:

.text   entropy 6.4  (normal code)
UPX1    entropy 7.95 (packed)

Step 3: Classify imports

Group imported APIs into behavioral buckets:

Injection : VirtualAllocEx, WriteProcessMemory, CreateRemoteThread   [T1055]
Network   : InternetOpen, HttpSendRequest, WinHttpConnect            [T1071]
Crypto    : CryptEncrypt, CryptAcquireContext                        [T1486]
Persistence: RegSetValueEx, CreateService                            [T1547/T1543]

A sample importing only LoadLibrary/GetProcAddress is resolving APIs dynamically — a packing/evasion tell.

Step 4: Inspect resources and strings

Look for embedded PEs in resources (droppers), config blobs, and notable strings (URLs, mutex names, paths).

Step 5: Check signing

Verify the Authenticode signature: unsigned, self-signed, or revoked certificates are suspicious for software claiming to be legitimate.

Read the full file on GitHub · 115 lines

Files

What ships with it

3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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 · 115 lines · 64 tokens per session scan A a99440482b3c

Subscribe to this mod's changes

performing-static-pe-analysis is a skill published in the GitHub repository meltedinhex/analyst-ai-pack (22 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 64 tokens to every session and 860 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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