SubScraper

💥 v3.0 now available! 💥

SubScraper is a fast subdomain enumeration tool that uses a variety of techniques to find subdomains of a given target. Subdomain enumeration is especially helpful during penetration testing and bug bounty hunting to uncover an organization's attack surface.

Depending on the CMD arguments applied, SubScraper can resolve DNS names, request HTTP(S) information, and perform CNAME lookups for takeover opportunities during the enumeration process. This can help identify next steps and discover patterns for exploitation.

Key Features

Modular design makes it easy to add new techniques/sources.
Various levels of enumeration for additional data gathering.
Allows for multiple target inputs or read targets from .txt file.
Windows CLI compatibility.
Generate output files in .txt or .csv format.

Install

The following can be used to install SubScraper on Windows, Linux, & MacOs:

git clone https://github.com/m8sec/subscraper
cd subscraper
python3 setup.py install

Docker

You can build a docker image and run subscraper from Docker:

git clone https://github.com/m8sec/subscraper.git
cd subscraper
docker build -t m8sec/subscraper .
# display help
docker run --rm m8sec/subscraper
# example scanning a site
docker run --rm m8sec/subscraper example.com

Usage

Command Line Args

SubScraper Options:
  -T MAX_THREADS        Max threads for enumeration (Default: 55).
  -t TIMEOUT            Timeout [seconds] for search threads (Default: 25).
  -r REPORT             Output to specific file {txt*, csv}.
  target                Target domain.

Module Options:
  -L                    List SubScraper enumeration modules.
  -M MODULES            Execute module(s) by name or group (Default: all).
  -w WORDLIST           Custom wordlist for DNS brute force.
  --censys-id CENSYS_ID             Censys.io API ID.
  --censys-secret CENSYS_SECRET     Censys.io API Secret.

Enumeration Options:
  --dns                 Resolve DNS address for each subdomain identified.
  --http                Probe for active HTTP:80 & HTTPS:443 services.
  --takeover            Perform CNAME lookup & probe for HTTP(s) response.
  --all                 Perform all checks on enumerated subdomains.

Modules

Modules can be executed by name or by module groups:

  Module Name       Description

  archiveorg           - Use archive.org to find subdomains.
  certsh               - Subdomains enumeration using cert.sh.
  dnsbrute             - DNS bruteforce.
  threatcrowd          - Threadcrowd.org subdomain enumeration.
  dnsdumpster          - Use DNS dumpster to enumerate subdomains.
  bufferoverrun        - Bufferover.run passive enumeration.
  search               - Subdomain enumeration via search engine scraping.
  censys               - Gather subdomains through censys.io SSL cert Lookups.
    |_API_ID                   Censys.io API ID               (Required:True)
    |_API_SECRET               Censys.io API Secret           (Required:True)
  bevigil              - Gather subdomains through bevigil.com mobile app scan data
    |_API_Key                  BeVigil API Key                (Required:True)

Module Groups

all - Execute all modules (Default).
brute - Only execute DNS brute force techniques.
scrape - Only execute web scraping techniques.

Example Usage

subscraper example.com
subscraper targets.txt
cat targets.txt | subscraper pipe
subscraper -all -r enumeration.csv example.com
subscraper -M brute -w mywords.txt example.com
subscraper -M censys --censys-id abc123 --censys-secret xyz456 example.com

Execution Notes

SubScraper only uses PASSIVE enumeration techniques unless all, http, takeover arguments are applied.
API keys are required for the censys module, register for free at censys.io/register.
.txt reports will only include subdomains.
.csv reports, when paired with cmd args all, http, takeover, will provide additional HTTP data such as page size, title, and Server headers.

Contribute

Contribute to the project by:

Like and share the tool!
Create an issue to report new enumeration techniques or, better yet, develop a module and initiate a PR.

m8sec/subscraper

m8sec

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