Skip to content
cccskills
FreePublished on GitHub

analyzing-pe-imports-and-exports

Analyzes a PE file's import and export tables to infer capability: mapping imported APIs to behaviors (networking, crypto, injection, persistence), spotting dynamic-resolution stubs, and reading exports of malicious DLLs. Activates for requests to analyze PE imports, inspect the IAT/exports, or infer capability from API usage.

The English summary is being prepared. Showing the original description.

Run score Not tested

See how to install

Files included (4)

  • SKILL.md3.1 KB
  • LICENSE340 B
  • references/api-reference.md1.1 KB
  • scripts/analyst.py3.0 KB

SKILL.md (original)

Review the instructions the agent will receive before you install.

Analyzing PE Imports and Exports

When to Use

  • You have a Windows PE and want a fast capability read from its imported APIs.
  • You need to identify suspicious API clusters (injection, crypto, anti-analysis) before deeper reversing.
  • You are inspecting a malicious DLL's exports to find its callable entry points.

Do not use the import table alone as a verdict — packers stub imports and malware resolves APIs dynamically; a thin IAT can hide real capability.

Prerequisites

  • pefile (pip install pefile); the sample handled inertly in the lab.

Safety & Handling

  • Parse the PE statically; never run it during import analysis.
  • Keep the sample password-protected at rest and reference it by hash.

Workflow

Step 1: Parse imports

Enumerate imported DLLs and functions from the import directory (IAT). A sparse IAT plus a GetProcAddress/LoadLibrary pair suggests dynamic resolution.

python scripts/analyst.py imports sample.exe

Step 2: Map APIs to behaviors

Cluster imports into behavior buckets: networking (Ws2_32, WinINet), process/injection (VirtualAllocEx, WriteProcessMemory, CreateRemoteThread), crypto (Crypt*, bcrypt), persistence (Reg*, service APIs), and anti-analysis (IsDebuggerPresent).

Step 3: Inspect exports

For DLLs, list exports (by name and ordinal). Unusual export names or a single exported DllRegisterServer/ordinal hint at how the module is invoked.

Step 4: Flag dynamic resolution

Note LoadLibrary/GetProcAddress, ordinal-only imports, and tiny IATs as signs that the real capability is resolved at runtime — escalate to dynamic/RE workflows.

Validation

  • Import behavior buckets are consistent with other static signals (strings, sections).
  • A thin or stubbed IAT is recognized as a packing/dynamic-resolution indicator, not "benign".
  • Exports of a malicious DLL are enumerated with their invocation method identified.

Pitfalls

  • Trusting a small IAT as low-capability when imports are resolved dynamically.
  • Ignoring delay-load and bound imports.
  • Reading ordinal-only imports without resolving them to function names.

References

Reviews

No reviews yet. Tell others what you thought.

Comments

No login needed. Share how it worked for you, ask a question, or note where it did not run.

No comments yet. Be the first to write one.

Comments are published right away. Do not include personal information such as email addresses or phone numbers. Up to 2 URLs.

0 / 1,000 characters

This form is protected by reCAPTCHA, and the Google Privacy Policy and Terms of Service apply.

More skills from this repository

Reverses Android malware: unpacking APKs, decompiling DEX bytecode to readable Java, auditing the manifest for abused permissions and components, and locating dynamically loaded or native payloads. Activates for requests to analyze an APK, decompile DEX, or investigate a suspicious Android app.

The English summary is being prepared. Showing the original description.

meltedinhex/analyst-ai-pack22Updated Jul 7, 2026

Analyzes API call traces from a sandbox or API monitor (JSON) to group calls by category, reconstruct high-level behaviors (process injection, file drops, network, crypto), and flag suspicious call sequences. Activates for requests to analyze an API trace, interpret sandbox API logs, or identify behavior from Win32/Native API calls.

The English summary is being prepared. Showing the original description.

meltedinhex/analyst-ai-pack22Updated Jul 7, 2026

Analyzes Windows Authenticode signatures on PE files: checking for a signature, reading the signer certificate chain, detecting revoked/expired/stolen certs, and recognizing signature-stripping and catalog-signing abuse. Activates for requests to analyze a code signature, verify Authenticode, or assess signer trust on a PE.

The English summary is being prepared. Showing the original description.

meltedinhex/analyst-ai-pack22Updated Jul 7, 2026

Analyzes banking trojan webinject configurations to extract targeted institutions, injected JavaScript/HTML, and data-theft hooks, mapping the fraud workflow. Activates for requests to analyze banking trojan webinjects, parse a webinject config, or map targeted banks and credential-theft injections.

The English summary is being prepared. Showing the original description.

meltedinhex/analyst-ai-pack22Updated Jul 7, 2026

Analyzes Python-based malware packaged as PyInstaller/py2exe executables by detecting the packer, locating the embedded archive, and identifying bundled .pyc modules for extraction and decompilation. Activates for requests to analyze compiled Python malware, unpack a PyInstaller binary, or extract pyc modules from a frozen Python executable.

The English summary is being prepared. Showing the original description.

meltedinhex/analyst-ai-pack22Updated Jul 7, 2026

Analyzes cryptojacking/coinminer malware by extracting mining pool endpoints (stratum), wallet addresses, algorithm and miner identifiers (XMRig and forks), and persistence or resource-control settings from static strings and config. Activates for requests to analyze a cryptominer, extract mining pool and wallet IOCs, or identify coinminer configuration.

The English summary is being prepared. Showing the original description.

meltedinhex/analyst-ai-pack22Updated Jul 7, 2026

See all skills by meltedinhex

Report a problem with this skill