SimeonOnSecurity’s Writeups and Walkthroughs

HackTheBox - Challenges - Crypto - Bank Heist

2020-10-07 (Modified: 2026-08-04) — Written by SimeonOnSecurity — 1 min read

Learn how to decode T9/Multitap and Atbash ciphers to solve the Bank Heist challenge on HackTheBox.

An illustration of a futuristic bank vault with intricate digital locking mechanisms and floating holographic displays of ciphers, set against a dark background with vibrant colors.

#hackthebox #Cryptography #Cyber security #cybersecurity #Hacking

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HackTheBox - Challenges - Crypto - Call

2020-10-07 (Modified: 2026-08-04) — Written by SimeonOnSecurity — 2 min read

Learn how to decrypt DTMF tones using prime number cipher to solve the Crypto - Call challenge on HackTheBox.

An illustration showing colorful soundwaves emanating from a stylized audio file icon, intertwined with geometric shapes representing prime numbers, all on a dark background.

#hackthebox #Cryptography

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HackTheBox - Challenges - Crypto - Decode

2020-10-07 (Modified: 2026-08-04) — Written by SimeonOnSecurity — 1 min read

Learn how to decode Fernet and Malboge ciphers to solve the HackTheBox Crypto Challenge and uncover the hidden flag.

An abstract digital illustration showing twisted strings and glowing data streams on a dark navy background, representing the decoding of Fernet and Malboge ciphers with vibrant blue, green, and purple colors.

#hackthebox #challenges #Crypto #cybersecurity #Cryptography

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HackTheBox - Challenge - Crypto - Weak RSA

— Written by SimeonOnSecurity — 1 min read

Learn how to use an automated RSA attack tool, RsaCtfTool, to easily solve the HackTheBox Weak RSA Crypto challenge.

An abstract illustration of a futuristic interface showing RSA encryption concepts, featuring a key diagram and an encrypted flag, set against a dark background with vibrant colors.

#hackthebox #challenges #Crypto

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HackTheBox - Invite Challenge (Windows/Linux)

— Written by SimeonOnSecurity — 2 min read

Learn how to generate an invite code and join the HackTheBox online platform to test and advance your skills in penetration testing and cybersecurity on both Windows and Linux.

The image features a split-screen view with a Windows PowerShell window on one side and a Linux terminal window on the other, each showing commands for generating an invite code against a dark blue background.

#hackthebox #penetration testing #cybersecurity #Windows #Linux

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