Search Results for “probably” – Page 2

March 15, 2008

Inside Session 0 Isolation and the UI Detection Service – Part 1

One of the many exciting changes in Windows Vista’s service security hardening mechanisms (which have been aptly explained and documented in multiple blogs and whitepapers , so I’ll refrain from rehashing old material) is Session 0 Isolation. I’ve thought it would be useful to talk about this change and describe the behaviour and implementation of …

Continue reading “Inside Session 0 Isolation and the UI Detection Service – Part 1”

January 25, 2008

Building the Lego Millennium Falcon: A Lesson in Security?

Not all of a reverse engineer’s life has to be about undoing — sometimes it is equally as fun to build something from scratch, whether that means a new tool… or the Star Wars 30 Year Anniversary Lego Ultimate Collector’s Millennium Falcon! Over the course of the last three weeks, my best friend and myself …

Continue reading “Building the Lego Millennium Falcon: A Lesson in Security?”

November 3, 2007December 6, 2007

Behind Windows x64’s 44-bit Virtual Memory Addressing Limit

The era of 64-bit computing is finally upon the consumer market, and what was once a rare hardware architecture has become the latest commodity in today’s processors. 64-bit processors promise not only a larger amount of registers and internal optimizations, but, perhaps most importantly, access to a full 64-bit address space, increasing the maximum number …

Continue reading “Behind Windows x64’s 44-bit Virtual Memory Addressing Limit”

May 20, 2007May 20, 2007

Secrets of the Application Compatilibity Database (SDB) – Part 1

For the last few days, I’ve been intimately becoming aquainted with a piece of technology in Windows XP and Vista that rarely gets the attention it deserves. It has raised my esteem and admiration towards Microsoft ten fold, and I feel it would be wise to share it, publicize it, and then of course, find …

Continue reading “Secrets of the Application Compatilibity Database (SDB) – Part 1”

March 21, 2007

The Interview Experience at Top IT Companies.

As promised, here follows what I hope will be an interesting overview of my interview experience as an intern candidate at Google, Microsoft and Apple. Google My interview at Google was probably the most unusual of the bunch. A long time ago (Almost a year), one of my friends in the fellow reverse-engineering community contacted …

Continue reading “The Interview Experience at Top IT Companies.”

February 16, 2007

Rebooting from Kernel Mode

I see this question posted on OSR Online a lot: “How do I force a reboot of the computer from kernel mode?”. The clean solution always being recommended is to have a user-mode service that talks to the driver and does the appropriate ExitWindowsEx API call. But what if you really want to do it …

Continue reading “Rebooting from Kernel Mode”

January 28, 2007January 31, 2007

Update on Driver Signing Bypass

I apologize for the lack of news, but after attending CUSEC, I had to spend my time on catching up the two weeks of school and work that I had missed, and exploiting Vista ended up going on the backburner, especially as I had to re-install VMWare 6.0 (which wasn’t being helpful with me) and …

Continue reading “Update on Driver Signing Bypass”

January 17, 2007January 31, 2007

Windows Vista 64-bit Driver Signing/PatchGuard Workaround

I’ve been sitting on this one for a while (over a year), awaiting confirmation of a final key component in the procedure, but I’ve now been able to test my method. I will be spending tomorrow finishing up the paper and exploit code on my test Virtual PC image. Before you get all excited, please …

Continue reading “Windows Vista 64-bit Driver Signing/PatchGuard Workaround”

January 15, 2007

Back from CUTC

I had the chance to attend the Canadian Undergraduate Technology Conference 2007 this year, in Toronto, and it was one of the most entertaining, informative and enjoyable event I’ve ever been to lately. Apart from the wonderful keynotes (one of them was by a Nobel laureate), the competitions, tech shows and sessions were extremly useful. …

Continue reading “Back from CUTC”

January 8, 2007

Solution to Challenge

The clock has ticked past midnight, so it’s now time to reveal the solution to my previous challenge. When I say “Solution” I mean what I and others are aware to be the currently best method. Nobody else has found anything better, and the two “winners” have presented the same solution (which Windows itself uses). …

Continue reading “Solution to Challenge”