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IOK

IOK (Indicator Of Kit) is an open source language and ruleset for detecting phishing threat actor tools and tactics

From phish-reportยทUpdated June 22, 2026ยทView on GitHubยท

**[Indicator of Kit](https://phish.report) is an open source detection language for phishing site techniques, kits, and threat actors ๐Ÿ•ต๏ธ** The project is written primarily in Go, distributed under the Open Data Commons Open Database License v1.0 license, first published in 2022. Key topics include: phishing, phishing-detection, phishing-kit, sigma-rules.

<p align="center"> <a href="https://phish.report/IOK"> <img width="400" src="https://raw.githubusercontent.com/phish-report/IOK/main/.github/logo.svg" alt="IOK logo" /></a> </p> <p align="center"> <a href="https://phish.report/IOK">View detections on phish.report ๐ŸŸ</a> </p> <hr> <img src="https://raw.githubusercontent.com/phish-report/IOK/main/.github/fake-chrome-error.yml.svg" alt="Screenshot of one of the IOK indicator rules" width="50%" align="right" />

Indicator of Kit is an open source detection language for phishing site techniques, kits, and threat actors ๐Ÿ•ต๏ธ

  • Simple: based on Sigma, a simple detection rules language ๐Ÿš€
  • Rich metadata: rules have descriptions, tags, and links to blog posts or related rules.

Use cases:

๐Ÿ“ Creating indicators

IOK indicators are written using Sigma

Field nameTypeDescription
title[]stringThe title of the site as shown in a browser. If multiple titles are set (e.g. by JavaScript), this contains each one.
hostnamestringThe hostname of the site
htmlstringThe contents of the page HTML (as returned by the server)
domstringThe contents of the page HTML after loading (e.g. after javascript has executed)
js[]stringContents of JavaScript from the page (includes inline scripts as well as scripts loaded externally)
css[]stringContents of CSS from the page (includes inline stylesheets as well as externally loaded stylesheets)
cookies[]stringCookies from the page. Each is in the form cookieName=value
headers[]stringHeaders sent by the server. Each is in the form Header-Name: value
requests[]stringURLs of requests made by the page (and assets loaded by the page)

We are always looking for contributions: there's far more phishing kits and techniques than a single team can analyse!

To contribute a new rule:

  1. Try to make sure it doesn't already exist
  2. Open a pull request, adding your new file in the indicators/ folder
  3. We'll review it and merge your PR
  4. It'll go live on phish.report/IOK!

๐Ÿ’ญ Comparison to similar projects

IOKPhishingKit-Yara-RulesWappalyzer
Open Sourceโœ…โœ…โœ…
Ruleset size> 215 Rules ๐Ÿฆ500 rules ๐Ÿ 1000s of rules ๐Ÿณ
Can scanLive websites ๐Ÿ•ธPhishing kit zips ๐Ÿ“ฆLive websites ๐Ÿ•ธ
Phishing focusedโœ…โœ…โŒ
Supports complex conditionsโœ…โœ…โŒ
Sends out stickers to contributors ๐ŸŽโœ…โŒโŒ

๐Ÿค Contributing

There's a reference on how to write IOK rules in the Phish Report documentation.

๐Ÿ“ License

This project is ODbL licensed.
You're free to use the rules in your own projects (including commercial ones!)
as long as you credit phish.report/IOK as the source.

For more details, read OpenStreetMap's guidance (who also use
the ODbL license).

Contributors

Showing top 12 contributors by commit count.

View all contributors on GitHub โ†’

This article is auto-generated from phish-report/IOK via the GitHub API.Last fetched: 6/27/2026