CSAW CTF 2014 - Cryptography 200 - Psifer School

This is the first crypto-problem, and it was supposed to be the easiest one. For this reason I was expecting simple cryptographic algorithms, which turned out to be true.

The problem starts with the following text:

There's no heartbleed here. Why don't we use these ciphers?

nc 54.209.5 …

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A Lit Backdoor

I was never a big fan of Macbooks. Being a penguin user for so long, you learn to stop worrying and love love the bomb. But here is a little trick that works for both.

In the victim's machine (presumably a macbook), create the reverse shell in the port 1337 …

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Getting your Public IP from the Terminal

Public IPv4 addresses are assigned by NIC and belongs to CIDR blocks that are unique to the entire internet.

In this little post I show many ways to find your public IP address form the Linux terminal.

Using Curl

You can simply curl it from IP websites:

$  curl ifconfig.me …
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