# yassineaboukir/sublert

Sublert is a security and reconnaissance tool which leverages certificate transparency to automatically monitor new subdomains deployed by specific organizations and issued TLS/SSL certificate.

Repository: https://github.com/yassineaboukir/sublert
Canonical: https://ross.abutalabs.com/products/sublert
Language: Python
License: MIT
License Family: permissive
Topics: reconnaissance, sublert, penetration-testing, pentest, security, certificate-transparency, bug-bounty, python, monitoring-tool, certificate-transparency-logs, hacking, information-gathering
Last push: 2021-02-05T10:38:06+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 2735, "days_push": 2035, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1034, forks 165 (observed 2026-08-28T04:03:18.575571+00:00)

## What it is
Sublert is a Python CLI security and reconnaissance tool that uses certificate transparency logs to monitor new subdomains issued TLS/SSL certificates by specific organizations. It is designed to run periodically (e.g., daily via cron), performs DNS resolution to identify working subdomains, and pushes notifications of new findings to a Slack workspace.

## Use cases
- monitor new subdomains deployed by a target organization
- discover subdomains via certificate transparency logs for bug bounty recon
- get Slack notifications when a company issues new TLS certificates
- resolve discovered subdomains via DNS to find live hosts
- schedule automated daily subdomain monitoring on a VPS
- track attack surface growth of specific domains over time

## When to choose
- you need automated, scheduled subdomain monitoring with Slack alerts
- you do bug bounty or penetration testing reconnaissance on specific organizations
- you want a lightweight Python tool that leverages certificate transparency logs

## When to avoid
- you need a one-shot full subdomain enumeration with many data sources rather than ongoing monitoring
- you require active scanning or vulnerability assessment, not just discovery
- you need Windows-native support or a GUI
- you want actively maintained software with recent updates

## Facets
- artifact type: cli-tool
- maturity: maintenance
- function: monitoring, web-scraping, security, cli
- domain: security, penetration-testing, osint
- platform: python, cli
- tags: certificate-transparency, subdomain-enumeration, reconnaissance, bug-bounty, slack-notifications, dns-resolution, linux

## Member repositories
- yassineaboukir/sublert (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:18.575571+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T07:06:36.762657+00:00, confidence not recorded.
  - readme: https://github.com/yassineaboukir/sublert (fetched 2026-08-28T04:03:18.575571+00:00, sha 955683d307c7)
- Data as of 2026-08-30T08:39:29.467469+00:00.