$ ctf42

Challenges

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Difficulty
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Higher weight ≈ harder, more prestigious event.
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37 challenges · browse all techniques

Challenge CTF Weight Category Has
Quartet
#multi-volume-zip
 NahamCon 2025 53.77 Misc files wu 1
Screenshot
#hexdump-reconstruction
 NahamCon 2025 53.77 Misc files wu 1
The_Martian
#binwalk-extraction
 NahamCon 2025 53.77 Misc files wu 1
Thats_Not_My_Base
#base92-decoding
 NahamCon 2024 41.61 Misc files wu 1
Twine
#strings-analysis
 NahamCon 2024 41.61 Misc files wu 2
Uriel
#double-url-decode
 NahamCon 2024 41.61 Misc files wu 1
dangerous
#ret2win
 NahamCon 2020 23.72 Misc files wu 3
leet_haxor
#format-string
 NahamCon 2020 23.72 Misc files wu 1
ripe_reader
#stack-buffer-overflow
 NahamCon 2020 23.72 Misc files wu 2
saas
#syscall-blacklist-bypass
 NahamCon 2020 23.72 Misc files wu 3
shifts_ahoy
#shellcode-injection
 NahamCon 2020 23.72 Misc files wu 2
syrup
#stack-pivot
 NahamCon 2020 23.72 Misc files wu 1
SSH_Key_Tester NahamCon 2025 53.77 Misc files wu 1
Hashes_on_Hashes_on_Hashes NahamCon 2024 41.61 Misc files wu 1
Free_Flagsi NahamCon 2025 53.77 Misc files
Author_aJohnHammond NahamCon 2024 41.61 Misc files
Base3200 NahamCon 2024 41.61 Misc files
EICAR NahamCon 2024 41.61 Misc files
Macro_Madness_1_The_Breach NahamCon 2024 41.61 Misc files
Macro_Madness_3_The_Decryption NahamCon 2024 41.61 Misc files
My_Shop_Disaster NahamCon 2024 41.61 Misc files
QRRRRRRRR NahamCon 2024 41.61 Misc files
Ring_Cycle_1_Basics NahamCon 2024 41.61 Misc files
Ring_Cycle_2_Rhinegold NahamCon 2024 41.61 Misc files
Ring_Cycle_3_Valkyrie NahamCon 2024 41.61 Misc files
Ring_Cycle_4_Siegfried NahamCon 2024 41.61 Misc files
Ring_Cycle_5_Gotterdammerung NahamCon 2024 41.61 Misc files
Secret_Info NahamCon 2024 41.61 Misc files
SecureSurfer NahamCon 2024 41.61 Misc files
The_Mission_Start_Here NahamCon 2024 41.61 Misc files
WP_Elevator NahamCon 2024 41.61 Misc files
malware NahamCon 2024 41.61 Misc files
ml NahamCon 2024 41.61 Misc files
malware NahamCon 2022 24.61 Misc files
warmup NahamCon 2021 24.98 Misc files
conveyor_belt NahamCon 2020 23.72 Misc files
free_willy NahamCon 2020 23.72 Misc files