02 December, 2019

Instagram OPSEC

Operational security for the average zoomer

   Which I am not, of course. But seeing as most of my peers are, I am
   compelled to write this post. Using a social platform like Instagram
   automatically implies that the user understands (to some level) that
   their personally identifiable information is exposed publicly, and they
   sign up for the service understanding this risk -- or I think they do,
   anyway. But that's about it, they go ham after that. Sharing every
   nitty gritty detail of their private lives without understanding the
   potential risks of doing so.

   The fundamentals of OPSEC dictacte that you develop a threat model, and
   Instgrammers are obviously incapable of doing that -- so I'll do it for
   them.

Your average Instagrammer's threat model

   I stress on the word "average", as in this doesn't apply to those with
   more than a couple thousand followers. Those type of accounts
   inherently face different kinds of threats -- those that come with
   having a celebrity status, and are not in scope of this analysis.
     * State actors: This doesn't really fit into our threat model, since
       our target demographic is simply not important enough. That said,
       there are select groups of individuals that operate on
       Instagram^[1]1, and they can potentially be targetted by a state
       actor.

     * OSINT: This is probably the biggest threat vector, simply because
       of the amount of visual information shared on the platform. A lot
       can be gleaned from one simple picture in a nondescript alleyway.
       We'll get into this in the DOs and DON'Ts in a bit.
     * Facebook & LE: Instagram is the last place you want to be doing an
       illegal, because well, it's logged and more importantly -- not
       end-to-end encrypted. Law enforcement can subpoena any and all
       account information. Quoting Instagram's [2]page on this:

     a search warrant issued under the procedures described in the
     Federal Rules of Criminal Procedure or equivalent state warrant
     procedures upon a showing of probable cause is required to compel
     the disclosure of the stored contents of any account, which may
     include messages, photos, comments, and location information.

   That out of the way, here's a list of DOs and DON'Ts to keep in mind
   while posting on Instagram.

DON'Ts

     * Use Instagram for planning and orchestrating illegal shit! I've
       explained why this is a terrible idea above. Use secure comms --
       even WhatsApp is a better choice, if you have nothing else. In
       fact, try avoiding IG DMs altogether, use alternatives that
       implement E2EE.
     * Film live videos outside. Or try not to, if you can. You might
       unknowingly include information about your location: street signs,
       shops etc. These can be used to ascertain your current location.
     * Film live videos in places you visit often. This compromises your
       security at places you're bound to be at.
     * Share your flight ticket in your story! I can't stress this
       enough!!! Summer/winter break? "Look guys, I'm going home! Here's
       where I live, and here's my flight number -- feel free to track
       me!". This scenario is especially worrisome because the start and
       end points are known to the threat actor, and your arrival time can
       be trivially looked up -- thanks to the flight number on your
       ticket. So, just don't.
     * Post screenshots with OS specific details. This might border on
       pendantic, but better safe than sorry. Your phone's statusbar and
       navbar are better cropped out of pictures. They reveal the time,
       notifications (apps that you use), and can be used to identify your
       phone's operating system. Besides, the status/nav bar isn't very
       useful to your screenshot anyway.
     * Share your voice. In general, reduce your footprint on the platform
       that can be used to identify you elsewhere.
     * Think you're safe if your account is set to private. It doesn't
       take much to get someone who follows you, to show show your profile
       on their device.

DOs

     * Post pictures that pertain to a specific location, once you've
       moved out of the location. Also applies to stories. It can wait.
     * Post pictures that have been shot indoors. Or try to; reasons
       above. Who woulda thunk I'd advocate bathroom selfies?
     * Delete old posts that are irrelevant to your current audience. Your
       friends at work don't need to know about where you went to high
       school.

   More DON'Ts than DOs, that's very telling. Here are a few more points
   that are good OPSEC practices in general:
     * Think before you share. Does it conform to the rules mentioned
       above?
     * Compartmentalize. Separate as much as you can from what you share
       online, from what you do IRL. Limit information exposure.
     * Assess your risks: Do this often. People change, your environments
       change, and consequentially the risks do too.

Fin

   Instagram is -- much to my dismay---far too popular for it to die any
   time soon. There are plenty of good reasons to stop using the platform
   altogether (hint: Facebook), but that's a discussion for another day.

   Or be like me:

   0 posts lul

   And that pretty much wraps it up, with a neat little bow.
     __________________________________________________________________

    1. [3]https://darknetdiaries.com/episode/51/ -- Jack talks about
       Indian hackers who operate on Instagram.

References

   1. https://icyphox.sh/home/icy/leet/site/build/blog/ig-opsec/temp.html#fn:ddepisode
   2. https://help.instagram.com/494561080557017
   3. https://darknetdiaries.com/episode/51/