Scans web applications for second-order subdomain takeover by crawling the app, and collecting URLs (and other data) that match some specific rules, or respond in a specific way.
Go version >= 1.8 is required.
go get github.com/mhmdiaa/second-order
This will download the code, compile it, and leave a
second-order binary in $GOPATH/bin.
Command line options
-base string Base link to start scraping from (default "http://127.0.0.1") -config string Configuration file (default "config.json") -debug Print visited links in real-time to stdout -output string Directory to save results in (default "output")
go run second-order.go -base https://example.com -config config.json -output example.com -concurrency 10
Example configuration file included (config.json)
Headers: A map of headers that will be sent with every request.
Depth: Crawling depth.
LogCrawledURLs: If this is set to true, Second Order will log the URL of every crawled page.
LogQueries: A map of tag-attribute queries that will be searched for in crawled pages. For example,
"a": "href"means log every
hrefattribute of every
LogURLRegex: A list of regular expressions that will be matched against the URLs that are extracted using the queries in
LogQueries; if left empty, all URLs will be logged.
LogNon200Queries: A map of tag-attribute queries that will be searched for in crawled pages, and logged only if they don't return a
ExcludedURLRegex: A list of regular expressions whose matching URLs will not be accessed by the tool.
ExcludedStatusCodes: A list of status codes; if any page responds with one of these, it will be excluded from the results of
LogNon200Queries; if left empty, all non-200 pages' URLs will be logged.
LogInlineJS: If this is set to true, Second Order will log the contents of every
scripttag that doesn't have a
Output Directory Structure
All results are saved in JSON files that specify what and where data was found
OUTPUT logged-queries.json -> The results of `LogQueries` logged-non-200-queries.json -> The results of `LogNon200Queries` inline-scripts.json -> The results of `LogInlineJS`
This is a list of tips and ideas (not necessarily related to second-order subdomain takeover) on what to use Second Order for.
- Check for second-order subdomain takeover. (Duh!)
- Collect JS code by setting
LogInlineJSto true, and adding
- Find a target's online assets by using
LogURLRegex. (S3 buckets, anyone?)
- Collect SWF files by adding
<input>names by adding