There are some torrrents showing up with .lnkextension (ex: movie.mp3.lnk, tvshow.mkv.lnk…) and automated software (Sonarr, Radarr, Lidarr, qBittorrent RSS Downloader) could pick those torrents (but not import).
These (fake) torrents include a .lnk file that executes a script on your Windows
HOW TO exclude from download on qBittorrent.
-
Go to Options -> Downloads
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Enable “Exclude file names”
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Add patterns:
(one by line)
*.mp4.lnk
*.mp3.lnk
*.mkv.lnk
*.torrent.lnk
Or exclude all together: *.lnk
Example on VirusTotal https://www.virustotal.com/gui/file/e74f64df6ebaf3a1b6e3f42591eb6e87d2ac2828eb5a99fd8d3d82c140137fc9/detection
thanks Microsoft for hiding extensions by default!
Yes, but also whoever set the defaults for the *arr tools. Why would any file with extra shit past the extensions you’re looking for be considered an acceptable result?
Tack $ on the end of your regex, for fucks sake.
You gotta love how aggressively they prevent users from seamlessly running executables from the internet, a VERY legitimate common use case, but a desktop shortcut from the internet? Run away!
Linux users:
What if it executes and install Windows 11 on your machine!?
Oh lord please have mercy! Blacklisting the file extension right now!
ackshually the proprietary .lnk shortcut format can only be run on windows 🤓
Me too, but don’t want to download GBs of malware and bandwidth
Weak.
Harbor disaster. Seed the malware. Spread the fruits of chaos amongst the unworthy. Be complicit in their downfall. Feed on their agony ^^/s.lnk files are less than 4kb
That would seem suspicious. I’m sure they have some way to pad out the size.
Anyone paying attention to size would probably also notice they’re just .lnk files.
Not these ones, some could have more than 1GB, look at the virustotal link, the file had 422MB.
Also Sonarr/Radarr filter torrents by size
PS: had to rename the fine from
.lnkto.comso virustotal could accept
When I read the title, I was thinking of something sophisticated such as hidden executable streams inside the MKV container (IIRC, it’s possible to append binary data other than audio, video or subtitles specifically inside a MKV). The “.lnk” trick only works in Windows and, even there, it’s easy to prevent: Windows Explorer > Options > Advanced > find and check “Always show extensions for files” (i can’t really remember the exact label for this option as I’m not a Windows user, but something like this will be there).
Yet another reminder that piracy on Linux is the way because new files don’t have execute permissions by default
On many distros will open with WINE by default, not a big deal, you can just delete
~/.wine. If it does anything
Also make sure you have file extensions enabled in Explorer, it makes it waaay harder for something like this to work.
Could you just add *.lnk?
That’s mentioned near the bottom of the post.
deleted by creator
Ah yes you’re right
How is the link file executing malware? Can you put any shell script as the target?
You can put the script itself as the link. Shortcut to: powershell -command “Write-Host ‘Gonna pwn your shit’”
I am pretty sure a link file can open cmd/powershell with parameters to execute commands
Nice to know! Thank you!
