WUSTCTF2020 level2

https://buuoj.cn/challenges#[WUSTCTF2020]level2

exeinfo: NOT Win EXE - .o - ELF [ 32bit obj. Exe file - CPU : Intel 80386 - OS/ABI: Linux/GNU ] Detected UPX!

脱壳后查找 flag

Just_upx_-d