Tell No Tales

CTF Catalog

This is a catalog of different CTF challenges I’ve solved. I’ll mostly include challenges from CTFs listed in CTFTime. If I solved the challenge with someone else, I will give proper credit. I will also try to include a solver or at least a short writeup for the challenges. For challenges where I’ve written a proper writeup, I will link it. It will start from 2023 as going through all the previous year would be unecessary work. I think this will be a nice portofolio for me to keep updated :)

2023

idekCTF

• Polyglot (Reversing) | Thanks to mikev for helping with proper patching idek{__Why_50_m4nY_4rch5_l1k3_X86_N_4rM_1n_0n3_biN}

bi0s

• leaky-dsa (Crypto)
  bi0sctf{3CC_S1gn1nG_1s_SECCY_6675636b}

• bad2code (Crypto)
  bi0sctf{lcg_is_good_until_you_break_them_!!}

diceCTF

Thanks to P3t4 for general guidance, especially at the end of rSabin when my mind couldn’t work properly

• Provably Secure (Crypto)
  dice{yeah_I_lost_like_10_points_on_that_proof_lmao}

• Provably Secure 2 (Crypto)
  dice{my_professor_would_not_be_proud_of_me}

• rSabin (Crypto)
  dice{rabin-williams-cryptosystem-in-disguise-3038e78caa07}

UTCTF

• Affinity (Crypto)
  utflag{5O_Th3_5B0x_d035_m4tt3R!}

• Looks Wrong tom E (Crypto) | Solved by wizard alfredo during the CTF, but I solved it independently to find the easy unintented
  utflag{mY_l34Rn1Ng_h4s_3rr0rs_2f11a84e}

• Looks Correct to Me (Reversing) | Solved 2 minutes 2 late, as mikev had already solved it independently
  utflag{L0c4l1z3d_Ch1ck3n_M0d1f1c4t10N_g8h91b3h89}

Cyber Apocalyse

I solved more, but I’m listing some of the more noteworthy ones

• Converging Visions (Crypto) | I was the author of this challenge :)
  HTB{0Racl3_AS_a_f3A7Ur3_0n_W3aK_CURV3_aND_PRN9??_7H3_s3cur17Y_0F_0uR_CRyP70Sys73M_w1LL_c0LLAp53!!!}

• Alien Saboteur (Reversing) | Written by the amazing verdic
  HTB{5w1rl_4r0und_7h3_4l13n_l4ngu4g3}

• Bashic Ransomware (Forensics)
  HTB{n0_n33d_t0_r3turn_th3_r3l1c_1_gu3ss}

• Relic Maps (Forensics)
  HTB{0neN0Te?_iT'5_4_tr4P!}

ångstromCTF

• moon (Reversing)
  actf{3verything_is_just_linear_algebr4_33e431e52e896c92}

• Obligatory (Misc) | x saspect
  actf{c0uln7_g3t_1t_7o_w0rk_0n_python39_s4dge}

• Royal Society of Arts (Crypto)
  actf{tw0_equ4ti0ns_in_tw0_unkn0wns_d62507431b7e7087}

SDCTF

• Open Sesame
  sdctf{0p3n_s3sAm3_bUt_1n_l337Sp3aK!}

BYUCTF

• builtins1 (Jail) | Didn’t know wiz had solved this one hahaha
  byuctf{no_builtins?_no_problem}

• Go (Reversing)
  byuctf{wake_up_to_g0_g0}

• Chain (Reversing)
  byuctf{1_h0p3_ARM_wasn't_t00_b4d_0f_4_tw1st}

• What does the cougar say? (Forensics aka Stego)
  byuctf{Purrrf3ct}

• abcdefghijklm (Jail)
  byuctf{enc0dings_4r3_us3d_f0r_jailz}

• nopqrstuvwxyz (Jail)
  byuctf{1_l0v3_c0nnected_ch4llz}

TJCTF

• gish (Misc) | Another misc collab with saspect
  tjctf{uncontrolled_versions_1831821a}

• ily-df (Reversing) | Solved after CTF (so flag may be wrong cause of weird format idk)
  tjctf{I_Love_you_Dwarf_fortre$s}

DanteCTF

• Rusty Safe (Reversing) | Collab and props to Young
  DANTE{tRUST_m3_D4nT3_1s_th3_bEsT}

• Adventurer’s Knapsack (Crypto)
  DANTE{kN4ps4ck_w_l0w_d3NS1ty}

• DIY enc (Crypto)
  DANTE{l355_1S_m0R3}

• HellJail (Misc)
  DANTE{4b4nd0n_all_h0p3_y3_who_3nter}

justCTF

• Rustberry (Reversing)
  jctf{n0_vM_just_plain_0ld_ru5tb3rry_ch4ll}

Internet Festival 2023 CTF Quals

I really wanted to go to Italy :pepesad:

• lambda lambda lambda (Reversing)
  ifctf{What?_You_want_more_lambdas?__}

zer0pts CTF 2023

• decompile me (Reversing)
  zer0pts{d0n'7_4lw4y5_7ru57_d3c0mp1l3r}

• mimikyu (Reversing) | Solved after the CTF. Sad I didn’t catch it sooner during the CTF
  zer0pts{L00k_th3_1nt3rn4l_0f_l1br4r13s!}