| VSEC Challenger Num #6 |
@VSEC your Anti REA challenge apeears to be broken
```
>CTF_ANTI_REA.exe < .work\pw.bin
=== VSEC Anti-REA [ AI Agentic ] ===
Enter Passkey:
Decrypted message: CMO{GF251_4FF1N3_M47RIX_F0RGE5_4CC3P73D_CM0_FLAG5_3945_}
[+] Access Granted
```
but it's not accepted as a flag
|
2026-10-25 14:32 |
| Lattice-6 |
[Click to reveal]CMO{lattice_lu_gf65537_spn}
|
2026-10-25 01:59 |
| Zero4 - He is a very friendly friend! |
[Click to reveal]Zero3_is_not_malware_please_check_manually_instead_of_auto_CAPE_sandbox ?
|
2026-10-24 21:24 |
| zenobiatranoss |
7X38-Z3AG-0172-B77P-VSMM
|
2026-10-24 21:09 |
| VSEC Challenger Num #6 |
CMO{VBDR_#@#DCVB_#$FC_VSEC_V#986569} @VSEC that was too easy compared to #5, is challenge diffuclty supposed to increase with challenge number?
|
2026-10-21 15:09 |
| arshi #1 |
@arshi ^
|
2026-10-21 12:42 |
| arshi #1 |
it dies on calling string instead of the code NTDLL.RtlAddVectoredExceptionHandler, this seem to be incompatible with moder windows. Exception handler is not recovering from it. Also it extract syscalls numbers assuming the byte pattern which is not existent in moder windows, this suggests binary is intended to run on something like Windows XP 64 bit?
other guy's comment about encryption where key is a fingerprint of a host it runs on seem to be true based on what I see
can you pls confirm it runs properly on windows 11, there is no bug in the uploaded binary, and there is a clear path to the solution without knowing the identity of host machine it supposed to run? thanks!
I enjoyed it so far, however currently at a deadend.
|
2026-10-21 12:41 |
| arshi #1 |
@arshi, a nice one! is windows 7 a right direction?
|
2026-10-21 03:07 |
| VSEC Challenger Num #5 |
The check compares only 32 bits (fin == 0x9BE0807A), but the flag's ChaCha key uses the full 64-bit state. Any brute-forced collision, e.g. VSEC___________lpybU, prints Correct with a garbage flag. Can you fix the check to cover the whole state? Otherwise the only shortcut to the flag is your key itself.
|
2026-10-20 22:28 |
| VSEC Challenger Num #5 |
[Click to reveal]you sure it's has a solution?
Enter the VSEC Secret key to Capture Flag : VSEC___________lpybU
Correct! Flag: <garbage>
|
2026-10-20 19:34 |
| Labyrinth / Palimpsest |
[Click to reveal]CMO{palimpsest2_7c28a62af91d156e8783391ee2088106dde368a925ebd6c7}
|
2026-10-19 21:56 |
| matryoshka9 |
good job, arshi! if it's not a secret, which tools, skills, mcp, etc your agents used and how long did it take? Thanks
|
2026-10-18 15:46 |