BoxCutter

Catégorie: Reverse Difficulté: very-easy Flag: HTB{tr4c1ng_th3_c4ll5}

Challenge

3KB

rev_boxcutter.zip

archive

Description

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BoxCutter is a Very Easy reversing challenge. Players will use strace to identify the flag.

Résolution

Un simple strace sur le binaire pour suivre les appels système permet de récupérer le flag

$ strace ./cutter
execve("./cutter", ["./cutter"], 0x7ffc96598bd0 /* 54 vars */) = 0
brk(NULL)                               = 0x55b369818000

[SNIP]

munmap(0x7f56cca64000, 97498)           = 0
openat(AT_FDCWD, "HTB{tr4c1ng_th3_c4ll5}", O_RDONLY) = -1 ENOENT (No such file or directory)
newfstatat(1, "", {st_mode=S_IFCHR|0600, st_rdev=makedev(0x88, 0), ...}, AT_EMPTY_PATH) = 0

[SNIP]

exit_group(0)                           = ?
+++ exited with 0 +++