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العربية

Open-Source Intelligence (OSINT)

How information is gathered from public sources and connected to reach an answer.

Estimated time
25 min
Level
Beginner
Your progress in this track0%

Open-source intelligence (OSINT) is gathering information from public sources available to everyone, and connecting the pieces to reach a conclusion. In CTF challenges you might be given a photo and asked where it was taken, or a username to trace across platforms. The skill is less about special tools and more about a methodical way of thinking: where to start, how to verify, and how to connect one piece of evidence to another. This lesson introduces that method and its ethical limits.

Labs

  • A reused handle

    EasyDownload

    Find the reused handle and follow it to the profile that holds the flag.

    Enter the lab

  • Geotagged posts

    MediumDownload

    Pin the hideout by pivoting on the leader location and read the flag from his last post there.

    Enter the lab

  • Archived snapshots

    HardDownload

    Compare the snapshots and find the removed comment that holds the flag.

    Enter the lab

  • Pivot through a leak

    HardDownload

    Pivot from the handle to the email to the leaked password and extract the flag.

    Enter the lab

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