> ## Documentation Index
> Fetch the complete documentation index at: https://rootea.es/llms.txt
> Use this file to discover all available pages before exploring further.

# Cronos

> Verified writeups for the Cronos machine of Hack The Box

# Cronos

<p className="machine-summary"><span className="prompt"><code>\$ tldr</code></span> AXFR → command injection → cron job privesc</p>

<div className="machine-meta">
  | ·                | ·                                                                                                                                                |
  | ---------------- | ------------------------------------------------------------------------------------------------------------------------------------------------ |
  | Operating system | Linux                                                                                                                                            |
  | Difficulty       | Medium                                                                                                                                           |
  | Vector           | <span className="vbadge vbadge-web">Web</span>                                                                                                   |
  | IP               | `10.10.10.13`                                                                                                                                    |
  | Retirement date  | 2020-04-14                                                                                                                                       |
  | Skills           | Domain Zone Transfer (AXFR) SQLI (Blind Time Based) - Creating a custom Python script Command Injection Abusing Cron Job \[Privilege Escalation] |
</div>

## Writeups

| Language | Author      | Format | Link                                                      |
| -------- | ----------- | ------ | --------------------------------------------------------- |
| 🇪🇸 ES  | **S4vitar** | Vídeo  | [Open](https://www.youtube.com/watch?v=kBw3UyBt7Hc)       |
| 🇬🇧 EN  | **0xdf**    | Texto  | [Open](https://0xdf.gitlab.io/2020/04/14/htb-cronos.html) |
| 🇬🇧 EN  | **IppSec**  | Vídeo  | [Open](https://www.youtube.com/watch?v=CYeVUmOar3I)       |

## Skill resources

Curated documentation for each technique listed in the *Skills* column above. Sources: HackTricks, GTFOBins, PortSwigger, etc.

| Skill                | Source      | Link                                                                                    |
| -------------------- | ----------- | --------------------------------------------------------------------------------------- |
| OS Command Injection | PortSwigger | [Open](https://portswigger.net/web-security/os-command-injection)                       |
| DNS zone transfer    | HackTricks  | [Open](https://book.hacktricks.wiki/en/network-services-pentesting/pentesting-dns.html) |
| SQL Injection        | HackTricks  | [Open](https://book.hacktricks.wiki/en/pentesting-web/sql-injection/index.html)         |
| SQL Injection        | PortSwigger | [Open](https://portswigger.net/web-security/sql-injection)                              |

## Related skills worth mastering

Remote Code Execution (RCE) · Cross-Site Scripting (XSS)

## If you liked this machine, try

* [Scavenger](/en/htb/machines/linux/dificil/scavenger) — Linux, Hard
* [Union](/en/htb/machines/linux/medio/union) — Linux, Medium
* [Writer](/en/htb/machines/linux/medio/writer) — Linux, Medium
* [Fortune](/en/htb/machines/linux/insano/fortune) — Linux, Insane
* [Nightmare](/en/htb/machines/linux/insano/nightmare) — Linux, Insane

***

## Comments & tips

Did the official writeup not work? Found a smarter trick? Share it here — comments live in [GitHub Discussions](https://github.com/FFuson/HTB_Writeups/discussions).

<div className="rootea-giscus-wrap" data-giscus-term="machine:cronos" data-giscus-lang="en" />

*Last updated: 2026-06-07*

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