[RACCOON CITY] Operation RCity5

Index

1. Problem information

2. Problem solving

3. Review

---

 

 

 

[Problem information]

---

 

 

 

[Problem solving]

1. I Accessed the server with rcity5 user.

 

 

2. I listed the files, and there was a "flag.txt" file. So I printed the contents of that file to the terminal. There was a string encoded in base64. The base64 incoded string ends with '='. It looked like it would have to be decoded.

 

 

3. I used the base64 command to decode that string. 

 

 

4. There was another way to decode that text. That is using BASE64 decode web service.

(https://www.base64decode.org/)

---

 

 

 

[Review]

You can see options for the base64 command in the picture below.

 

 

The base64 encoding and decoding methods in the terminal are summarized as follows. 

 

-Base64 incoding: base64 'file name'

 

-Base64 decoding: base64 -d 'file name'