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hexionCTF 2020 Miscellaneous

“Hmmm”

Problem Description :

🤔
Note: anime girl isn’t the flag

In this problem, we are given a file called “hmmm”. First, lets try to execute it.

As you can see on the left, this is the image that the file prints.

Lets take a closer look into the actual file. You can open it up in text editor/notepad/etc… Once opened up, we get this program :

ELF>Ä @∏[email protected]@&%@@@PPP®®   ’’000∞=∞M∞M`h¿=¿M¿MÄÄÄ!
!
 ®®®  »»»DDSÂtd®®®  PÂtdå6å6å6LLQÂtdRÂtd∞=∞M∞MPP/lib64/ld-linux-x86-64.so.2hexCTF{1m_s0rry_1f_y0u_r3v3r5ed_7h1s}GNU¿GNUV(=Ó’¯[àZâåæa9®GNUÅ—eŒmD &` o "libc.so.6putsusleep__cxa_finalize__libc_start_mainGLIBC_2.2.5_ITM_deregisterTMCloneTable__gmon_start___ITM_registerTMCloneTableui	8∞M`!∏M !PPÿO‡OËOO¯O»O–OÛ˙HÉÏHãŸ/HÖ¿tˇ–HɃ√ˇ5í/Úˇ%ì/Û˙hÚÈ·ˇˇˇêÛ˙hÚÈ—ˇˇˇêÛ˙Úˇ%ù/DÛ˙Úˇ%]/DÛ˙Úˇ%U/DÛ˙1ÌIâ—^Hâ‚HɉPTLç&Hç
ØHç=͡2/ÙêHç=Y/HçR/H9¯tHã/HÖ¿t	ˇ‡Ä√ÄHç=)/Hç5"/H)˛HâH¡Ó?H¡¯H∆H—˛tHãÂ.HÖ¿tˇ‡fD√ÄÛ˙Ä=Â.u+UHÉ=¬.HâÂtHã=∆.Ë	ˇˇˇËdˇˇˇ∆Ω.]√√ÄÛ˙ÈwˇˇˇÛ˙UHâÂHÉÏHâ}¯HãE¯Hâ«Ë€˛ˇˇø†ÜË·˛ˇˇê…√Û˙UHâÂHÉÏ «EÏffãEÏHÖ¿xÛH*¿ÎHâ¬H—ÍɇH	¬ÛH*¬ÛX¿ÛEHç=KËèˇˇˇ«EÙÎsãMÙãEÏ∫˜Òâ–Ö¿u\ÎãuÙãEÏ∫˜ˆâEÏãMÙãEÏ∫˜Òâ–Ö¿t›ÛZMÛ*EÙÛZ–Ú◊
Ú^¬f(–Ú«
Ú\¬ÚY¡ÚZ¿ÛEÉEÙãEÙØ¿9EÏsÇHç=ò˸˛ˇˇÉ}ÏvVÛZMãEÏHÖ¿xÛH*¿ÎHâ¬H—ÍɇH	¬ÛH*¬ÛX¿ÛZ–Ú

*Along with other stuff but I'm not going to bother dissecting it 

Browsing through the program, we see the flag in blatant sight.

Flag :

hexCTF{1m_s0rry_1f_y0u_r3v3r5ed_7h1s}

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