---
title: "Discussion on \"CTF Writeup: ads | Forensics | BSidesSF 2026\" | Hashnode"
description: "Discussion on \"CTF Writeup: ads | Forensics | BSidesSF 2026\". Description\n\n\"We found this video, we know there is a flag in it somewhere!\"\n\n\nOverview\nThis challenge hides a flag inside a secondary video stream embedded in an MP4 file. The visible video is just b"
url: "https://hashnode.com/posts/ctf-writeup-ads-forensics-bsidessf-2026/69c7395a7cf2706510861e94"
---

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Discussion

# [CTF Writeup: ads | Forensics | BSidesSF 2026](https://mollysohaney.hashnode.dev/ctf-writeup-ads-forensics-bsidessf-2026?utm_source=hashnode&utm_medium=feed)

Description "We found this video, we know there is a flag in it somewhere!" Overview This challenge hides a flag inside a secondary video stream embedded in an MP4 file. The visible video is just b

Mar 28 · 6 min read · mollysohaney.hashnode.dev  
Updated Mar 29  
Read the article

-   [#ctf](https://hashnode.com/tag/ctf)
-   [#ctf-writeup](https://hashnode.com/tag/ctf-writeup)
-   [#ctfwriteup](https://hashnode.com/tag/ctfwriteup)
-   [#forensics](https://hashnode.com/tag/forensics)

## Written by

[Molly Sohaney](https://hashnode.com/@mollysohaney)

@mollysohaney

  
[View profile](https://hashnode.com/@mollysohaney)

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