$ ctf42

Challenges

Category
Difficulty
CTFtime weight
–
Higher weight ≈ harder, more prestigious event.
Year
–
Must have
Reset

145 challenges · browse all techniques

Challenge CTF Weight Category Has
STEGO_Subway_2
#ascii-value-stego
 KubSTU 2026 24.83 Hardware files wu 1
Hidden_in_Flash
#i2c#eeprom#hardware
 UMassCTF 2025 48.38 Hardware files wu 1
Blood_Of_Circuits
#logic-gate-circuit
 KnightCTF 2022 17.38 Hardware files wu 1
Fix_It_Felix
#avr-firmware-reversing
 KnightCTF 2022 17.38 Hardware files wu 1
Cereal
#uart-logic-analyzer
 NahamCon 2022 24.61 Hardware files wu 2
Dweeno
#xor-logic-circuit
 NahamCon 2022 24.61 Hardware files wu 3
Garys_Sauce
#verilog-reversing
 NahamCon 2022 24.61 Hardware files wu 1
BoatLouder
#pic18f-microcontroller-reversing#bootloader#firmware
 Aero 2021 35.17 Hardware files wu 1
A_Different_Type_of_Serial_Key
#hardware#logic-analyzer#spi#i2c#xor-decode
 CSAW 2021 Quals 20.54 Hardware files wu 1
A_Pain_in_the_BACnet
#pcap-analysis#bacnet#scapy#protocol-parsing
 CSAW 2021 Quals 20.54 Hardware files wu 3
The_Magic_Modbus
#pcap-analysis#modbus#tcp-stream
 CSAW 2021 Quals 20.54 Hardware files wu 2
Project_Power
#correlation-power-analysis
 ICHSA 2021 – Hardware files wu 1
Layered_Circuits H7CTF 2024 22.56 Hardware files wu 1
passino
#arduino-seven-segment
 BSidesTLV 2023 35.00 Hardware files wu 1
Dark_Pixels ASIS 2026 Quals 90.53 Hardware files
Echoes ASIS 2026 Quals 90.53 Hardware files
Ggreyline ASIS 2026 Quals 90.53 Hardware files
OutOfPhase ASIS 2026 Quals 90.53 Hardware files
Sideband_Surgery ASIS 2026 Quals 90.53 Hardware files
Silent_Carrier ASIS 2026 Quals 90.53 Hardware files
Walkie_Leaks ASIS 2026 Quals 90.53 Hardware files
Operation_Redwave ApoorvCTF 2026 24.10 Hardware files
QBitFlipper ApoorvCTF 2026 24.10 Hardware files
Resonance_Lock_The_Harmonic_Multiplier ApoorvCTF 2026 24.10 Hardware files
Shake_It_To_The_Max ApoorvCTF 2026 24.10 Hardware files
deaDr3conin ApoorvCTF 2026 24.10 Hardware files
Nanovault_Ledger CTF@AC 2026 Quals – Hardware files
Pitlane_Can_Gateway CTF@AC 2026 Quals – Hardware files
STEGO_BRO_SORRY KubSTU 2026 24.83 Hardware files
STEGO_Color_Illusion KubSTU 2026 24.83 Hardware files
STEGO_Quiet_Whisper KubSTU 2026 24.83 Hardware files
STEGO_Red_Zone KubSTU 2026 24.83 Hardware files
STEGO_Subway_3 KubSTU 2026 24.83 Hardware files
STEGO_Subway_3.5 KubSTU 2026 24.83 Hardware files
STEGO_Subway_4 KubSTU 2026 24.83 Hardware files
BabyRF L3akCTF 2026 34.47 Hardware files
Hardware_is_a_Scam L3akCTF 2026 34.47 Hardware files
Software_is_a_Scam L3akCTF 2026 34.47 Hardware files
Spectre L3akCTF 2026 34.47 Hardware files
A_Whisper_in_the_Air Securinets 2026 Quals 85.12 Hardware files