how noob am i?
REVERSE
SIGNAL
check it with DIE,64 bit
step into the main func,nothing sus here,lets check the function list
we can find some very sussy name here
check the function GenerateChallenge,seems like the flag is a random string within"a" to "9"
now it is clear, check the other functions
and this is the flag
TFCCTF{b11e807f65b27dcf82e70c4bad63a3eb}
CRYPTO
CCCCC
5c4c4c6c4c3c4c3c5c4c4c6c7cbc6c3c7c3c6c8c6cfc7c5c7c4c5cfc6c3c6cfc7c5c7c4c5cfc6c3c7c4c3c0c5cfc6c3c6cdc7c9c5cfc6c3c6c2c3c0c7c9c5cfc6c3c3c4c6cec6c4c5cfc6c3c6cdc7c9c5cfc6c3c6c4c6cfc6c7c5cfc6c3c6c1c6cec6c4c5cfc6c3c6cdc7c9c5cfc6c3c6c3c3c4c3c7c7cdc0ca
remove all letter C from the text
then 16bytes|ASCII chara
5446434354467b6373686f75745f636f75745f6374305f636d795f636230795f63346e645f636d795f63646f675f63616e645f636d795f636334377d0a
TFCCTF{cshout_cout_ct0_cmy_cb0y_c4nd_cmy_cdog_cand_cmy_cc47}
GENETICS
CCCA CACG CAAT CAAT CCCA CACG CTGT ATAC CCTT CTCT ATAC CGTA CGTA CCTT CGCT ATAT CTCA CCTT CTCA CGGA ATAC CTAT CCTT ATCA CTAT CCTT ATCA CCTT CTCA ATCA CTCA CTCA ATAA ATAA CCTT CCCG ATAT CTAG CTGC CCTT CTAT ATAA ATAA CGTG CTTC
The correspondence can be found clearly:
CCCA->T
CACG->F
CAAT->C
CAAT->C
CCCA->T
CACG->F
From this correspondence,we can infer that the basic group A,T,C,G matches correspond to 2,1,3,0
(Special Thanks:G3rling)
therefore:
and punctuation matches their position in the ASCII code tb.
the flag:
TFCCTF{1_w1ll_g3t_th1s_4s_4_t4tt00_V3ry_s00n}