Writeups/1337UP/Bob L'éponge
1337UPMediumCTF Challenge

Bob L'éponge

Bob L'éponge

2024-11-17

##Challenge Name: Bob L'éponge

###Solves

  • >Solves: 82
  • >Points: 100

###Description

I'm an epic hacker and I'm trying to start a YouTube channel to show off my skills! I've been playing around with some of the video settings and stumbled upon a few cool features. Can you find the secret I've hidden?


###Approach

  1. >

    Initial Observations:

    • >We were given a YouTube video URL to investigate. Watching the video, we determined that there was no flag directly visible in the video content itself.
  2. >

    Exploring Additional Elements:

    • >Checked for:
      • >Comments: No useful information.
      • >Descriptions: Empty.
      • >Subtitles or annotations: None present.
    • >Navigated to the channel's main page to look for additional content.
  3. >

    Discovering the Playlist:

    • >

      On the channel, we found a playlist named

      a playlist
      . It contained three videos:

      • >
        Test
      • >
        Test2
      • >
        Test3
        (the one we already had the URL for).
    • >

      Both

      Test
      and
      Test2
      were 1 second long, and like
      Test3
      , they contained no useful information in their comments, descriptions, or subtitles.

  4. >

    Missed Opportunity During the Challenge:

    • >After the challenge ended, it was revealed that the flag was hidden in the metadata of the YouTube page source.
    • >By viewing the page source (
      Ctrl + U
      ) and searching for
      INTIGRITI
      , the flag was found in the metadata.
    • >Crtl + F and search for
      INTIGRITI
      .

    Image
    Image

  5. >

    Flag Found:

    INTIGRITI{t4gs_4r3_m0stly_0bs0l3t3_zMlH7RH6psw}

###Flag

INTIGRITI{t4gs_4r3_m0stly_0bs0l3t3_zMlH7RH6psw}

$ echo "Open to collaborations, research, and security engineering work."

> Open to collaborations, research, and security engineering work.

$ uptime

> Portfolio online since 2024 | Last updated: Feb 2026

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