Using netcat (nc) is going to be pretty important. Can you connect to jupiter.challenges.picoctf.org at port 25103 to get the flag?
Open up the terminal and type the following command.
nc jupiter.challenges.picoctf.org 25103
You've got the flag. If you want to learn more about nc type the following command to the terminal.
man nc
Download the warm program.
cat warm;
returns Hello user! Pass me a -h to learn what I can do!-hOh, help? I actually don't do much, but I do have this flag here:
We can already see the flag here, but we can take it a step further. Give permissions of the executable with:
chmod +x warm
./warm -h
returns the flag.
What is 0x3D (base 16) in decimal (base 10)?
There is a thing called ASCII table that contains data in different formats. For example, the ASCII 65 corresponds to the HEX -> 41 and the symbol 'A'. These values are all equal, but in different representations.
You can take a look at ASCII Codes Table.
Image Credit: ASCII Codes Table
If I told you a word started with 0x70 in hexadecimal, what would it start with in ASCII?
There is a thing called ASCII table that contains data in different formats. For example, the ASCII 65 corresponds to the HEX -> 41 and the symbol 'A'. These values are all equal, but in different representations.
First dowload the Addadshashanammu.zip file.
Run the following command to unzip its contents.
unzip -u Addadshashanammu.zip
Then change directory to Addadshashanammu
cd Addadshashanammu/
Download strings file and type the following command in the terminal.
strings strings | grep picoCTF
If you want to learn more about strings type the following command.
man strings
Download all files, (static and ltdis.sh)
cat static
Provides an output that includes the flag itself. However, we will look into ltdis.sh to learn more about it.
cat ltdis.sh
Use wget to download the Python file.
A short description from Wikipedia: GNU Wget (or just Wget, formerly Geturl, also written as its package name, wget) is a computer program that retrieves content from web servers. It is part of the GNU Project. Its name derives from "World Wide Web" and "get". It supports downloading via HTTP, HTTPS, and FTP.
This challenge is extremely easy. You use wget to download the file and then run the script using Python.
If you want to learn more about wget, then in the terminal type the following.
man wget
wget https://artifacts.picoctf.net/c/34/runme.py
A short description from Wikipedia: GNU Wget (or just Wget, formerly Geturl, also written as its package name, wget) is a computer program that retrieves content from web servers. It is part of the GNU Project. Its name derives from "World Wide Web" and "get". It supports downloading via HTTP, HTTPS, and FTP.
python3 runme.py
That's all.
First, download the file and use the following command to see it's contents.
cat values
That in turn, returns the following output.
Decrypt my super sick RSA:
c: 8533139361076999596208540806559574687666062896040360148742851107661304651861689
n: 769457290801263793712740792519696786147248001937382943813345728685422050738403253
e: 65537