Topfile.tj -

The platform likely supports common file types: PDF (most important for legal docs), DOCX, XLSX, JPG, and PNG. PDFs can be previewed directly in the browser without downloading potentially unsafe attachments.

Alex leaks a partial version of the file to a dark web news site, The Hollow, sparking global outrage. But Titan counters by flooding the net with disinfo: “Topfile.tj is a hoax,” claim government and corporate media. Meanwhile, Marek’s enforcers hunt Alex, aided by a former ally—Rook, who betray Alex during a data heist on Titan’s R&D servers.

Alex’s only ally is Julieta Reyes, an investigative journalist whose brother died in a Titan “accident.” She deciphers the final clue in Topfile.tj: the algorithm requires a biological key—Ethan’s DNA sequence—to activate. The file isn’t a weapon; it’s a cure. Ethan had it. So does Alex, unknowingly—genetic twins.

Legitimate uses include:

However, like many anonymous file hosts worldwide (Rapidgator, Turbobit, etc.), Topfile.tj is also widely used to share copyrighted content—movies, music albums, cracked software, and e-books. This is where caution is needed.

| Service | Best For | Security | Speed (Tajikistan) | |--------|----------|----------|--------------------| | Topfile.tj | Local sharing | Low (user beware) | Fast | | Google Drive | Secure, long-term storage | High | Moderate | | MediaFire | General sharing | Medium | Slow | | Telegram (Saved Messages) | Quick, private transfers | Medium | Fast |

Any legitimate document service in Tajikistan must comply with the Law on Electronic Document and the Law on Personal Data. This includes: topfile.tj

For corporate accounts, administrators can grant view-only, comment, or full-edit permissions to different team members. This prevents accidental deletions or unauthorized changes.

1. Investigating the URL Parameter If the site has a URL structure like: https://website.tjctf.org/?file=hello.txt or https://website.tjctf.org/?page=about

The server script (likely PHP, Python, or Node) is taking the file parameter and looking for a file with that name.

2. Attempting Traversal Standard Directory Traversal payloads involve using ../ (or ..\\ on Windows) to move up one directory level.

We want to access the "top" file. In CTF context, "top" usually implies the root directory /, or specifically the file /flag.txt, /flag, or /home/flag.txt.

First, let's try to traverse up to the root. We don't know how deep the current directory is, so we use a large number of ../ sequences. The platform likely supports common file types: PDF

Payload: ../../../../../etc/passwd

If the URL becomes: https://website.tjctf.org/?file=../../../../../etc/passwd

And we see the contents of /etc/passwd (a standard test file for Linux servers), we know the traversal works.

3. Finding the Flag The challenge name "Top File" suggests looking in the top-level directory (root). Common locations for flags in TJCTF web challenges include:

Let's try the most common location: the root directory.

Payload: ../../../../../flag.txt

(Alternatively, if the application appends .txt automatically, you might just need ../../../../../flag).

4. The Working Exploit If the server structure was something like /var/www/html/files/, adding 4 sets of ../ would bring us to /.

URL: https://website.tjctf.org/?file=....//....//....//....//flag.txt

(Note: Sometimes filters block ../, requiring variations like ....// or URL encoding %2e%2e%2f).

However, in the original TJCTF Top File challenge, the intended solution was often simpler. The "top" hint referred to the root directory /.

Successful Request: ?file=../../../flag.txt Legitimate uses include:

Upon visiting this URL, the server reads the file located at /flag.txt and displays it in the browser.