Tuesday, 12 March 2019
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Sublert- A Security Reconnaissance Tool


Sublert is a security and reconnaissance tool that was written in Python 


To leverage certificate transparency for the sole purpose of monitoring new subdomains deployed by specific organizations and issued TLS/SSL certificate.


The tool is supposed to be scheduled to run periodically at fixed times, dates, or intervals (Ideally each day). New identified subdomains will be sent to Slack workspace with a notification push. Furthermore, the tool performs DNS resolution to determine working subdomains.

Requirements

  • Virtual Private Server (VPS) running on Unix. 
  • Python 2.x or 3.x.
  • Free Slack workplace.

Usage

Short Form   Long Form    Description
-u      --url Adds a domain to monitor. E.g: yahoo.com.
-d     --delete Domain to remove from the monitored list. E.g: yahoo.com.
-a      --list Listing all monitored domains.
-t     --threads Number of concurrent threads to use (Default: 20).
-r     --resolve Perform DNS resolution.
-l     --logging Enable Slack-based error logging.
-m      --reset Reset everything.

Is there a roadmap?

YES! The tool is now open sourced to be used by the community but contributions are valuable and highly appreciated. I have a number of items that I will be working on to polish the tool, among of which are:
  • Use of a relational database instead of text files for storage.
  • Extracting as much information as possible including: title, status code, screenshot and checking for potential subdomain takeovers.
  • Integrate Telegram too for notification pushes.

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