20210927gfsj_re_simple_unpack

题目描述：菜鸡拿到了一个被加壳的二进制文件

拿去查壳，发现有upx壳。

┌──(v5le0n9㉿kali)-[~/Desktop]
└─$ upx -d simpleunpack
                       Ultimate Packer for eXecutables
                          Copyright (C) 1996 - 2020
UPX 3.96        Markus Oberhumer, Laszlo Molnar & John Reiser   Jan 23rd 2020

        File size         Ratio      Format      Name
   --------------------   ------   -----------   -----------
    912808 <-    352624   38.63%   linux/amd64   simpleunpack

Unpacked 1 file.

┌──(v5le0n9㉿kali)-[~/Desktop]
└─$ file simpleunpack                        
simpleunpack: ELF 64-bit LSB executable, x86-64, version 1 (GNU/Linux), statically linked, for GNU/Linux 2.6.32, BuildID[sha1]=d2fb1adb997339317fc68e2cf960b9d38627423c, not stripped

64位二进制文件，拿去IDA找main函数看看，直接在汇编代码里找到了flag。

flag{Upx_1s_n0t_a_d3liv3r_c0mp4ny}