Abg Meki Sempit Verified -

We attach GDB to see what happens after we input something:

41 42 47 00 00 00 00 00 00 00 00 00 61 00 00 7F abg meki sempit verified

We have no clue what the password is. The binary does read from a file; it asks interactively on stdin . We attach GDB to see what happens after

$ file abg-meki-sempit abg-meki-sempit: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.32, not stripped, BuildID[sha1]=3c2d8e… version 1 (SYSV)

So the password is , the first three are “ABG”, the last is 0x7F , and the XOR of all bytes must equal 0x5A .