Europa

Verified writeups for the Europa machine of Hack The Box

Europa

$ tldr SQLi blind + preg_replace RCE → cron job privesc

·	·
Operating system	Linux
Difficulty	Medium
Vector	Web
IP	10.10.10.22
Retirement date	2021-02-02
Skills	SSL Certificate Inspection Login Bypass - SQLI SQLI (Blind Time Based) [Python Scripting] Abusing preg_replace (REGEX Danger) [RCE] Creating an AutoPwn script for Intrusion [Python Scripting] Abusing Cron Job [Privilege Escalation]

Writeups

Language	Author	Format	Link
🇪🇸 ES	S4vitar	Vídeo	Open
🇪🇸 ES	El Pingüino de Mario	Vídeo	Open
🇬🇧 EN	0xdf	Texto	Open
🇬🇧 EN	IppSec	Vídeo	Open

Skill resources

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

Skill	Source	Link
SQL Injection	HackTricks	Open
SQL Injection	PortSwigger	Open
Remote Code Execution (RCE)	HackTricks	Open

Related skills worth mastering

Cross-Site Scripting (XSS) · Local File Inclusion (LFI) · Remote File Inclusion (RFI) · Shellshock (CVE-2014-6271)

If you liked this machine, try

• Bastard — Windows, Medium
• Union — Linux, Medium
• Flujab — Linux, Hard
• Holiday — Linux, Hard
• Overflow — Linux, Hard

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Comments & tips

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Last updated: 2026-06-07