Cyber Apocalypse 2024

Packed

solved by : avantika(@iamavu)

we are given a binary, called packed i.e this has been obfuscated/packed by the dev, which hinders our exploitation and reversing as it’s very hard to understand what’s going on

we use checksec command provided by pwntools to check which packer they have used pwn checksec packed

as we can observe it has been packed with UPX, quite the popular packer, now we just need to unpack it to see all the functions properly, so we can dissect it using the following command upx -d -o unpacked packed we would now have binary called unpacked in our current directory, which will be unpacked and not obfuscated fire up your ghidra, let’s have a look at the functions, the entered function has our flag in plaintext, so pretty much easy win HTB{unp4ck3d_th3_s3cr3t_0f_th3_p455w0rd} pwned!