Windows System Software -- Consulting, Training, Development -- Unique Expertise, Guaranteed Results

Home NTFSD
Before Posting...
Please check out the Community Guidelines in the Announcements and Administration Category.

More Info on Driver Writing and Debugging


The free OSR Learning Library has more than 50 articles on a wide variety of topics about writing and debugging device drivers and Minifilters. From introductory level to advanced. All the articles have been recently reviewed and updated, and are written using the clear and definitive style you've come to expect from OSR over the years.


Check out The OSR Learning Library at: https://www.osr.com/osr-learning-library/


Changing file extension appearance on the fly

lapaz17lapaz17 Member Posts: 7
edited January 26 in NTFSD

Hi, I recently watched this video of Forcepoint DLP. The guy over there, applied an encryption policy (which encrypts files copied to USB) to files which are on USB. In windows explorer, files are shown as not encrypted but they are actually. The interesting thing is when he ejects USB and inserts to another pc (which has no DLP endpoint software of Forcepoint), files are shown with .ws suffix. Which specification of WINAPI provides this? Thanks in advance.

Comments

  • Peter_Viscarola_(OSR)Peter_Viscarola_(OSR) Administrator Posts: 8,317

    Which specification of WINAPI provides this?

    Huh?

    Sounds like he has a file system filter driver, that changes some of the attributes of the file... particular the file extension.

    Peter

    Peter Viscarola
    OSR
    @OSRDrivers

Sign In or Register to comment.

Howdy, Stranger!

It looks like you're new here. If you want to get involved, click one of these buttons!

Upcoming OSR Seminars
OSR has suspended in-person seminars due to the Covid-19 outbreak. But, don't miss your training! Attend via the internet instead!
Writing WDF Drivers 7 Dec 2020 LIVE ONLINE
Internals & Software Drivers 25 Jan 2021 LIVE ONLINE
Developing Minifilters 8 March 2021 LIVE ONLINE