yassineaboukir/sublertSublert is a security and reconnaissance tool which leverages certificate transparency to automatically monitor new subdomains deployed by specific organizations and issued TLS/SSL certificate.
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Author: Yassine Aboukir
Version: 1.4.7
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.
Please refer to below article for a detailed technical explanation:
If you have any feedback, anything that you want to see implemented or running into issues using Sublert, please feel free to file an issue on https://github.com/yassineaboukir/sublert/issues
If you appreciate my work and wish to support it, feel free to: 
| 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. |
| -q | --question | "yes" or "no" to enable/disable questions asking for input. |