| Category | Name | Objective |
Difficulty [⭐⭐⭐⭐⭐] |
|---|---|---|---|
| Crypto | brevi moduli | Factor small RSA moduli | ⭐ |
| Crypto | sekur julius | Decrypt twisted version of Caesar cipher | ⭐ |
| Crypto | sugar free candies | Solve system of 3 variables given 4 equations | ⭐ |
| Crypto | binary basis | Distinguish 128-bit primes from binary representation and RSA decrypt | ⭐⭐ |
| Crypto | hybrid unifier | Establish a secure session with server using hybrid cryptography | ⭐⭐ |
| Web | waywitch | Client side JWT signing | ⭐ |
| Web | phantom script | Standard XSS | ⭐ |
| Web | unholy union | Union SQL Injection | ⭐ |
| Web | void whispers | Blind Command Injection | ⭐⭐ |
| Forensics | Forbidden Manuscript | Enumerate HTTP stream and hex decode the flag | ⭐ |
| Forensics | Sp00ky Theme | Malicious Plasma 6 plasmoid (widget) that executes rogue commands. | ⭐ |
| Forensics | The Shortcut Haunting | Find the payload embedded in an lnk file and decoding it using base64. | ⭐ |
| Forensics | Foggy Intrusion | Analyze a pcap file containing some HTTP traffic that involves a PHP attack (CVE based) in order to obtain the flag. | ⭐⭐ |
| Forensics | Ghostly Persistence | Analyze multiple evtx files searching for powershell executed code in order to obtain the flag. | ⭐⭐ |
| Rev | CryptOfTheUndead | Reversing Encryption Algorithm | ⭐ |
| Rev | Graverobber | Using strace + scripting | ⭐ |
| Rev | SpookyPass | Standard strings challenge | ⭐ |
| Rev | LinkHands | Linking two linked lists | ⭐⭐ |
| Rev | Terrorfryer | Leaking PRNG shuffling | ⭐⭐ |
| Pwn | El Teteo | Shellcode execution | ⭐ |
| Pwn | Mathematricks | Integer overflow | ⭐ |
| Pwn | Que onda | Basic instructions | ⭐ |
| Pwn | El Mundo | Standard ret2win challenge | ⭐⭐ |
| Pwn | El Pipo | Basic Buffer Overflow | ⭐⭐ |
| Coding | addition | Given two numbers, return the sum. | ⭐ |
| Coding | oddly_even | Given a number, print "even" if it is even and "odd" if it is odd. | ⭐ |
| Coding | reversal | Given a string, return the reverse of the string. | ⭐ |
| Coding | minimax | Find the Smallest and Largest Number | ⭐⭐ |
| Coding | replacement | Given a string, a letter in the string and a random letter, replace all instances of the first letter with the latter. | ⭐⭐ |