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Jan 9

Hacking Series Part 23

Challenge: Holiday Hack 2022. Part 2. — This is the second part to my write up for the SANS Holiday Hack Challenge 2022. Challenge 9 — Open Boria Mine Door For this challenge, there is a door to the mines that is locked by six locks. Each lock has a slightly different web input validation flaw. …

Cybersecurity

8 min read

Hacking Series Part 23
Hacking Series Part 23
Cybersecurity

8 min read


Jan 9

Hacking Series Part 22

Challenge: Holiday Hack 2022. Part 1. — I’ve just completed the SANS Holiday Hack Challenge for 2022, I thought it was a lot of fun this year! Here is my write up. Challenge 1 of this CTF was simply obtaining your personal crypto wallet address and key, which is done as a part of the orientation. Challenge 2 — Wireshark Practice In…

Cybersecurity

10 min read

Hacking Series Part 22
Hacking Series Part 22
Cybersecurity

10 min read


Dec 10, 2021

Hacking Series Part 21

Challenge: PowerFul_Crackme — Category: reverse engineering We are given an ELF named “PowerFul_Crackme”. After opening it in IDA, you see that the program enters in main and prints “The magic string: ” with printf. It then goes on to initialize a counter at loc_11B3 from 0–9, which is stored in var_4. If the…

Reverse Engineering

3 min read

Hacking Series Part 21
Hacking Series Part 21
Reverse Engineering

3 min read


Aug 30, 2021

Hacking Series Part 20

Challenge: Holiday Hack Objective 11b Category: pwn?? blockchain?? We are given part of a blockchain and told there is an altered block somewhere. The goal was to find the four altered bytes in the new block and change it back to their original values, or essentially, reproduce the original block…

Hacking

2 min read

Hacking

2 min read


Aug 30, 2021

Hacking Series Part 19

Challenge: Holiday Hack Objective 11a — Category: pwn?? blockchain?? We are given a part of a blockchain and told to predict the nonce of block 130000. Since every block prior to the 130000th has a nonce, we can use the pseudo-randomness of these numbers to predict the future ones. …

Hacking

2 min read

Hacking Series Part 19
Hacking Series Part 19
Hacking

2 min read


Mar 15, 2021

Hacking Series Part 18

Challenge: Phonebook — Category: web security We are given an instance of a website that requires us to login when we navigate to it. …

Hacking

3 min read

Hacking Series Part 18
Hacking Series Part 18
Hacking

3 min read


Mar 13, 2021

Hacking Series Part 17

Challenge: Impossible Password — Category: reverse engineering We are given a file called “impossible_password.bin”. Using xxd, I looked at the header of the file and found out that it was actually an ELF which meant that it could be executed. …

Hacking

3 min read

Hacking Series Part 17
Hacking Series Part 17
Hacking

3 min read


Mar 7, 2021

Hacking Series Part 16

Challenge: WebNet0 — Category: Forensics We are given a Wireshark packet capture file called “capture.pcap” and an RSA key called “picopico.key”. When you open capture.pcap in Wireshark you see a TLS stream that is likely to hold the flag somewhere in it. When you follow the TLS stream, you can tell that it’s…

Hacking

2 min read

Hacking Series Part 16
Hacking Series Part 16
Hacking

2 min read


Feb 21, 2021

Hacking Series Part 15

Challenge: Investigative Reversing 3 — Category: reverse engineering and forensics We are given a binary called “mystery” and an image named “encoded.bmp”. When I opened mystery in IDA, I saw that three files were being opened, two that are being read from (flag.txt and original.bmp) and one that is being appended to (encoded.bmp). …

Hacking

4 min read

Hacking Series Part 15
Hacking Series Part 15
Hacking

4 min read


Feb 18, 2021

Hacking Series Part 14

Challenge: messy-malloc — Category: binary exploitation We are given a binary and it’s source code called “auth” and “auth.c”. By looking at auth.c, you can tell that this program is essentially a simple authentication program. …

Hacking

2 min read

Hacking

2 min read

97108

97108

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