Ikerlan CTF — Writeups

Writeups for the CTF organized by Ikerlan.

My first CTF. I signed up as part of a team, but ended up solving challenges on my own — which made it all the more rewarding.

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Challenges

Crypto

Challenge	Difficulty	Points	Writeup
El Mensaje Oculto	Easy	100	writeup
Un Mensaje Transportable	Easy	100	writeup
El Mensaje de la Cueva	Easy	200	writeup
RSA Desprevenido	Medium	300	writeup
Consecutive Chaos	Medium	300	writeup
RNG Malo	Medium	400	writeup
Mensajes Gemelos	Easy	400	writeup

Forensics

Challenge	Difficulty	Points	Writeup
La Fuente del Ataque	Easy	300	writeup
El Momento de la Intrusión	Easy	300	writeup
Suspicious Workstation: The Secret Note	-	100	writeup
Suspicious Workstation: User Identity	-	200	writeup
El Email Sospechoso	Easy	200	writeup
Suspicious Workstation: The Rogue Process	-	300	writeup
Alerta de Actualización Crítica	Medium	300	writeup
La Imagen del Administrador	Easy	300	writeup

Reversing

Challenge	Difficulty	Points	Writeup
Ojo de Lince	Easy	100	writeup
APK en la Nube	Easy	100	writeup
RockPaperScissors	-	100	writeup
Exclusive Confusion	Easy	200	writeup
El Cifrado de la Sabiduría Ancestral	Easy	300	writeup
First Steps	-	300	writeup
El Templo Perdido de los Antiguos	-	500	writeup

Web

Challenge	Difficulty	Points	Writeup
El Primer Paso	Easy	100	writeup
Un Camino Olvidado	Easy	200	writeup
La Apariencia Engañosa	Easy	300	writeup
El Viaje del Cifrado Perdido	Easy	300	writeup
El Diario Secreto	-	300	writeup
Lógica Doble Valor	Medium	400	writeup
Buscando a Wally	Medium	400	writeup
Industrial Sentinel	-	500	writeup

Hardware

Challenge	Difficulty	Points	Writeup
El Semáforo Rojo	-	100	writeup
GPIO Binary Password	Easy	100	writeup
Dialer Mystery	-	200	writeup
La EEPROM Robada	Easy	300	writeup
El Termómetro Saboteado	Easy	300	writeup
El Espectro Oculto	Medium	400	writeup
Señales del Pasado	Hard	500	writeup
El Silencio del Retraso	Medium	500	writeup

Miscellaneous

Challenge	Difficulty	Points	Writeup
Corrupted Image	Easy	200	writeup
Time Machine	-	200	writeup
ROM Hacker's Paradise	-	300	writeup
The Pathfinder's Escape	Easy	300	writeup
Honeypot Escape	-	400	writeup
Python Jail v2.0 - Maximum Security	-	400	writeup
The Binary Vault	-	400	writeup

Operational Technology

Challenge	Difficulty	Points	Writeup
Engaño Industrial: El Hombre en el Medio Modbus	-	200	writeup
Engaño Industrial: Extrayendo el Mensaje Oculto	Easy	300	writeup
Operation Nightshift - Industrial Sabotage Investigation (Part 1)	-	200	writeup
Operation Nightshift - Industrial Sabotage Investigation (Part 2)	-	300	writeup
Operation Nightshift - Industrial Sabotage Investigation (Part 3)	-	400	writeup
Factory Reset	Medium	400	writeup
The Recruiter: Industrial Infiltration	Medium	500	writeup

Machine Learning

Challenge	Difficulty	Points	Writeup
El Oráculo Cegado	-	400	writeup
Pixel Poison: The Dog that Sailed	-	500	writeup