Wappalyzer

Wappalyzer identifies technologies on websites, including content management systems, ecommerce platforms, JavaScript frameworks, analytics tools and much more.

Prerequisites

Git
Node.js version 12 or higher
Yarn

Quick start

git clone https://github.com/aliasio/wappalyzer
cd wappalyzer
yarn install
yarn run link

Usage

Command line

node src/drivers/npm/cli.js https://example.com

Chrome extension

Go go about:extensions
Enable 'Developer mode'
Click 'Load unpacked'
Select src/drivers/webextension

Firefox extension

Go go about:debugging#/runtime/this-firefox
Click 'Load Temporary Add-on'
Select src/drivers/webextension/manifest.json

Specification

A long list of regular expressions is used to identify technologies on web pages. Wappalyzer inspects HTML code, as well as JavaScript variables, response headers and more.

Patterns (regular expressions) are kept in src/technologies.json. The following is an example of an application fingerprint.

Example

"Example": {
  "description": "A short description of the technology.",
  "cats": [
    "1"
  ],
  "cookies": {
    "cookie_name": "Example"
  },
  "dom": {
    "#example-id": {
      "attributes": {
        "class": "example-class"
      },
      "properties": {
        "example-property": ""
      },
      "text": "Example text content"
    }
  },
  "dns": {
    "MX": [
      "example\\.com"
    ]
  },
  "js": {
    "Example.method": ""
  },
  "excludes": "Example",
  "headers": {
    "X-Powered-By": "Example"
  },
  "html": "<link[^>]example\\.css",
  "css": "\\.example-class",
  "robots": "Disallow: /unique-path/",
  "implies": "PHP\\;confidence:50",
  "meta": {
    "generator": "(?:Example|Another Example)"
  },
  "script": "example-([0-9.]+)\\.js\\;confidence:50\\;version:\\1",
  "url": ".+\\.example\\.com",
  "website": "https://example.com",
}

JSON fields

Find the JSON schema at schema.json.

Required properties

Field	Type	Description	Example
`cats`	Array	One or more category IDs.	`[1, 6]`
`website`	String	URL of the application's website.	`"https://example.com"`

Optional properties

Field	Type	Description	Example
`description`	String	A short description of the technology in British English (max. 250 characters). Write in a neutral, factual tone; not like an ad.	`"A short description."`
`icon`	String	Application icon filename.	`"WordPress.svg"`
`cpe`	String	The CPE is a structured naming scheme for applications, see the specification.	`"cpe:/a:apache:http_server"`

Implies and excludes (optional)

Field	Type	Description	Example
`implies`	String \| Array	The presence of one application can imply the presence of another, e.g. WordpPress means PHP is also in use.	`"PHP"`
`excludes`	String \| Array	Opposite of implies. The presence of one application can exclude the presence of another.	`"Apache"`

Patterns (optional)

Field	Type	Description	Example
`cookies`	Object	Cookies.	`{ "cookie_name": "Cookie value" }`
`dom`	Object	Uses a query selector to inspect element properties, attributes and text content.	`{ "#example-id": { "property": { "example-prop": "" } } }`
`dns`	Object	DNS records: supports MX, TXT, SOA and NS (NPM driver only).	`{ "MX": "example\\.com" }`
`js`	Object	JavaScript properties (case sensitive). Avoid short property names to prevent matching minified code.	`{ "jQuery.fn.jquery": "" }`
`headers`	Object	HTTP response headers.	`{ "X-Powered-By": "^WordPress$" }`
`html`	String \| Array	HTML source code. Patterns must include an HTML opening tag to avoid matching plain text. For performance reasons, avoid `html` where possible and use `dom` instead.	`"<a [^>]*href=\"index.html"`
`css`	String \| Array	CSS rules. Unavailable when a website enforces a same-origin policy. For performance reasons, only a portion of the available CSS rules are used to find matches.	`"\\.example-class"`
`robots`	String \| Array	Robots.txt contents.	`"Disallow: /unique-path/"`
`url`	String	Full URL of the page.	`"^https?//.+\\.wordpress\\.com"`
`meta`	Object	HTML meta tags, e.g. generator.	`{ "generator": "^WordPress$" }`
`scripts`	String \| Array	URLs of JavaScript files included on the page.	`"jquery\\.js"`

Patterns

Patterns are essentially JavaScript regular expressions written as strings, but with some additions.

Quirks and pitfalls

Because of the string format, the escape character itself must be escaped when using special characters such as the dot (\\.). Double quotes must be escaped only once (\"). Slashes do not need to be escaped (/).
Flags are not supported. Regular expressions are treated as case-insensitive.
Capture groups (()) are used for version detection. In other cases, use non-capturing groups ((?:)).
Use start and end of string anchors (^ and $) where possible for optimal performance.
Short or generic patterns can cause applications to be identified incorrectly. Try to find unique strings to match.

Tag	Description	Example
`confidence`	Indicates a less reliable pattern that may cause false positives. The aim is to achieve a combined confidence of 100%. Defaults to 100% if not specified.	`"js": { "Mage": "\\;confidence:50" }`
`version`	Gets the version number from a pattern match using a special syntax.	`"scripts": "jquery-([0-9.]+)\.js\\;version:\\1"`

Version syntax

Application version information can be obtained from a pattern using a capture group. A condition can be evaluated using the ternary operator (?:).

Example	Description
`\\1`	Returns the first match.
`\\1?a:`	Returns a if the first match contains a value, nothing otherwise.
`\\1?a:b`	Returns a if the first match contains a value, b otherwise.
`\\1?:b`	Returns nothing if the first match contains a value, b otherwise.
`foo\\1`	Returns foo with the first match appended.

vv4r1ock/wappalyzer