endless

Whoops! I deleted the file ending of this file, and now I can’t seem to figure out what type of file it was. Can you help me?

• Category: misc
• Challenge file: mystery-flag

Solution:

1. Use file command to know intended file format

The file command shows that the file is an MP3 audio file, we can rename it with proper file extension

$ mv mystery-flag mystery-flag.mp3

2. Listen to the audio file

Apparently, the flag is spoken letter by letter with a human voice. I still have some difficulties with getting each letter. I use Online Audio to Text tool to convert it.

Flag: LITCTF{f0udao4rtbsp6}