# subtake

Based on [@haccer](https://github.com/haccer)'s [subjack](https://github.com/haccer/subjack) script for subdomain takeover recon.

## Installation

Requires [Go](https://golang.org/dl/).

`go get github.com/jakejarvis/subtake`

## Usage

### Options

- `-f to-check.txt` is the path to your list of subdomains to check. One subdomain per line. **Required.**
- `-t` is the number of threads to use. (Default: 10)
- `-a` skips CNAME check and sends requests to every URL. (Default: false, but **Highly recommended.**) 
- `-timeout` is the number seconds to wait before timing out a check (Default: 10).
- `-o results.txt` is a filename to output results to. If the file ends with `.json`, subtake will automatically switch to JSON format.
- `-v` enables verbose mode. Displays all checks including not vulnerable URLs.
- `-c` Path to file containing JSON fingerprint configuration. (Default: `./fingerprints.json`)
- `-ssl` enforces HTTPS requests which may return a different set of results and increase accuracy.

### Resources

`sonar.sh` can be used first to gather a list of CNAMEs collected by Rapid7/scan.io's [Project Sonar](https://opendata.rapid7.com/sonar.fdns_v2/). This list can then be passed into subtake to return subdomains not in use. `sonar.sh` is based off of [`scanio.sh`](https://gist.github.com/haccer/3698ff6927fc00c8fe533fc977f850f8).

`fingerprints.json` can be modified to add or remove hosted platforms to probe for. Many obscure platforms are included, and removing fingerprints for services that are uninteresting to you can speed up the scan.

### Examples

`./sonar.sh 2018-10-27-1540655191-fdns_cname.json.gz sonar_all_cnames.txt`

`./subtake -f sonar_all_cnames.txt -t 50 -ssl -a -o vulnerable.txt`

## Subdomain Takeovers

- A great explanation of the risks of takeovers and steps to responsibly disclose takeovers to companies: https://0xpatrik.com/subdomain-takeover/
- A comprehensive list of what services are vulnerable and how to proceed once finding them: https://github.com/EdOverflow/can-i-take-over-xyz

## To-Do

- Integrate `sonar.sh` into the main Go script as an option instead of input file.
- All-in-one Docker image to automatically download the latest FDNS Project Sonar file and check for takeover possibilities.