Author:
Bobx

Language:
C/C++

Upload:
5:31 PM 11/06/2025

Download

Platform
Windows

Difficulty:
2.2

Quality:
4.0

Arch:
x86-64

Description

Good Luck and Have A Lot Of Fun ;)

• Comments
• Writeups

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ilkiNUR on 9:10 AM 11/07/2025: [*] Enter password (or type 'about'): CR4CK_TH15_M3G4_H4RD_2024! =============================================== [SUCCESS] Access Granted! Flag: FLAG{U_CR4CK3D_TH3_ULT1M4TE_CH4LL3NG3} Congratulations, elite hacker! ===============================================

ilkiNUR on 9:11 AM 11/07/2025: you use any xor process in GetPassword function but don't use them in real password ;)

Bobx on 10:08 AM 11/08/2025: thanks for using the bug to correct it

PL45M4 on 4:15 PM 11/08/2025: As ilkiNUR stated, the correct password is in plaintext which made trying to circumvent the anti-debugging checks unnecessary. Here's my writeup: https://bobbyhillreverseengineering.blogspot.com/2025/11/crackme-bobxs-very-hard-antidebug-10.html Thank you for the challenge.

Lilsan44444 on 7:05 PM 11/08/2025: At virtual address 00007FF65E3021DF the string 00000000005FFBC0 43 52 34 43 4B 5F 54 48 31 35 5F 4D 33 47 34 5F CR4CK_TH15_M3G4_ 00000000005FFBD0 48 34 52 44 5F 32 30 32 34 21 00 04 00 00 00 00 H4RD_2024!...... is loaded onto the stack easy as sus

Bobx on 12:33 AM 11/09/2025: Okay, I'm preparing version v2, which is not so easy anymore

OmarDecryptX on 6:13 PM 11/10/2025: Literally in the Strings references of x64dbg Address=00007FF6EF352581 Disassembly=lea rax,qword ptr ds:[7FF6EF3553E8] String Address=00007FF6EF3553E8 String=" Flag: FLAG{U_CR4CK3D_TH3_ULT1M4TE_CH4LL3NG3}"

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