IMPORTANT BE CAREFUL ANALYZING THE MODULES! Their pdb info portion links to a bitly tracker URL! YOU WILL BE TRACKED, ITS SUPER ILLEGAL BUT THEY DON'T CARE!!! By default the symbol server will try to retrieve a valid pdb from the URL. Introduction So, you'd like to build a snowman eh? Well, awhile ago I wasted far more time on EAC than I should have. I also told some people I'd eventually release information on it.

Fix Easy Anti Cheat. LeShepherd Jul 22, 2018, 4:32 PM. Hey guys so I'm getting pretty frustrated. All of a sudden almost all my Ubisoft games (Farcry 5 and ghost wildlands) except for The division.

So, here I am, man of my word. EasyAntiCheat, or EAC, is a clever ball of hack. It itself, is literally an intrusive hack that attacks other hacks by disabling their entry and monitoring and reporting their activity. Explanation Some morons think they've bypassed it with clever little wrapper dll's but that's simply not the case-unknown dll's are piped to the EAC network.

There's a whole slew of idiots who start their game without EAC and claim to have bypassed it. But that too, is not the case.

EAC behaves like a hack, it requires no effort on the game developer to deploy itself. The details are just too boring for me to cover when I'm in a bad mood like right now, so-expect more information and especially more detail in this post at a later date.

Packers Suck! Both the team, and in this case. I normally don't do any unpacking and just debug in runtime. Autocom 2013 r1 keygen idm. I'm far too lazy to figure out this shit.

So it took me a while to get to this point - I never debug kernel mode (as I stick in ring3 on principal). I still stick to ring3, and in this case it was for the best. EAC actually will actively keep you away from debugging kernel mode. But as usual this packer isn't even that special-it just took time on my part. I'd actually call this more of a fuzzer. It packs and obfuscates, but not overly so and not too much. It behaves like UPX, which they used once upon a time on the client side of things-but resembles MPRESS at first analysis.

First the pusha, pushf, unpacking- then the pops - which are not revealed until they themselves are unpacked. It's the same behavior of both UPX and MPRESS.

But there's often 2 to 5 different paths a static analyzer can take-it looks like they do different things but that's where system knowledge comes into play. The end result is the same regardless of the path taken. In the one I posted here-the net result is always as follows. Code: push 0FFFFFFFFA00044B6h push 0FFFFFFFFD4A60456h push r5 (rsi) push r8 push fq push r9 push r0 (rax) push r6 (rbp) push r2 (rcx) push r1 (rbx) push r3 (rdx) push r14 push r15 push r10 push r13 push r11Basically, x64 has no pusha, so the registers must be pushed manually, some registers don't actually matter to us: rsp (as by pushing and popping correctly, rsp is restored without popping it back.) To make your own unpacker, it is incredibly easy to use the ua_ functions of ida's python module to make an emulated stepper which acts on the database. Nitty Gritty The setup file (which isn't a real setup file) is the executable that contains the EAC Client, it resides at ' C: Windows System32 EasyAntiCheat.exe'. This is not to be confused with the initial installer piped with your game itself. It provides a very basic socket based http client to a service supposedly known as 'EAC.'

Specifically it makes gets/posts and other discussions a web server. First, I'll help you stand up your own basis for your own research. So how to start?

Well first you need to know where to get files from since the EAC client deletes all the important stuff! To grab any anti-cheat driver and client from EAC utilize your own code with the following format string. Code: Updated: 21MAY2015 Respective to each system, if you run x64 windows, it uses wow64 and if you run x86 windows it uses win32. The uuid is based on GetSystemTickCount.

It's basically random each time the game launches and is used as a session key for both transactions and encyphering via a very simple Mersenne Twister(pseudo-random-number[1 of many seeded based random number generators]) implementations. The seed is based off GetTickCount(). Quote: So, I spent like 6 hours today reverse engineering Easy Anti Cheat (EAC) since it magically appeared with RUST/7DTD some time ago and frankly.

Screw this anti-cheat. Never agreed to any disclaimer but it just hops away and installs its driver anyway! I'm rage-faced at this stupid little application, after unpacking this crap UPX stuff at: C: Windows SysWOW64 EasyAntiCheat.exe And the files in the common folder from steam, it ends up these are just ridiculously nonsensical service loaders for starting their craptastic driver. Hurray for chasing an imaginary rabit. So little information gleamed from these.