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Home » Security Bloggers Network » Minecraft Mod, Mothers Day, and A Hacker Dad
Minecraft Mod, Mothers Day, and A Hacker DadOver the weekend my wife was feeling under the weather. This meant we were stuck indoors and since she is sick and its Mothers day weekend less than ideal situation I needed to keep my son as occupied as possible so she could rest and recuperate.
When I asked my son what he wanted to do, he responded with a new Minecraft mod hed seen on one of these YouTubers channels. The mod allows you be various Marvel superheroes! Except, the mod version we downloaded well it lacked the suits hed seen on YouTube (of course it did).
Did my homework, realized he wanted a version that was only released if you were a Patreon supporter. Now, Im totally cool giving 5 bucks for software that somebody poured their heart into and with having recently watched Endgame the desire for the Iron man stuff shown in this paid-for-mod was larger than the desire to hold on to my 5 dollars. Went on Patreon, donated the $5, and downloaded the mod. Fired it up, everything appeared fine then I got this
What? Seriously? Well, I go back in and re-read the Patreon message
Ugh, so a couple issues here. One, we wanted access now. Taking a day (maybe) to add us to some magical list is less than ideal (which, the creator still hasnt responded to my emails so perhaps never?). Secondly, Im wondering if this is some sort of donate $5 every month to continue being on the magical list to use this mod. And, if I already paid for software, I just plain old dont like being at the mercy of someone else.
Time to be the hacker dad hero my son needs 😛 (plus, I wanted to teach him a life lesson about the hacker spirit).
Okay so a mod is just a jar file lets open this up with JD-GUI and search for Unauthorized use.
Each of these handlers has the same code, they all look basically identical, and they are checking to see if youre in a list and if youre not, then you dont get to play.
So where is this list coming from? Looks like www.cronistalascolonias.com.art()
What? Are we seriously pulling down some list from www.cronistalascolonias.com.ar to find out who our authorized users are?
Alright. so UUIDs? As it turns out, UUIDs map to usernames and that information is totally retrievable and this handy site helps www.cronistalascolonias.com.ar
Cool so now I know our UUIDs (and you do too but, again, anyone can find that out so its really whatever).
Now originally, I tried decompiling, changing the source and recompiling. At one point I even had my environment setup to compile from Eclipse with forge and this source code. But this was taking a couple hours and I needed a quick solution. This is where Burp came into play. Here is what I did.
1. Set Burp to listen on all interfaces under the proxy options
2. Exported its certificate so that both my son and my machines trusted the proxy for https traffic (no cert warnings)
3. Set our machines to use the Burp proxy for all of our traffic for Secure Web Traffic
4. Added a few proxy match & replace rules that replaces one of the other UUIDs with ours (and usernames for dev level access because.. why not)
Thats basically it. Once our machines started routing traffic thru my Burp proxy, every response from www.cronistalascolonias.com.ar with those UUIDs automatically had ours added to the list as authorized users and it worked like a charm.
Note that I have not given detailed instructions on those above 4 steps because there are already tons of tutorials out there if youre not already familiar with Burp & proxying web traffic.
Lets summarize. We paid $5, and we got told we still needed special permission to use this mod. Didnt sit well, wanted to get this working, and figured I could teach my son a little bit about computers/hacking. Now, did I email the creator of the mod? Yes, in fact I let them know what I found and the workaround. Was very upfront about that. Also provided usernames in case the creator did feel like adding them (though I doubt hes feeling super generous). But we had some fun, learned a little, and got to use the mod.
Having said all that, if youre in a position to donate even a few bucks for software that someone spends a good chunk of their time writing, Id say do it. But if they dont deliver as promised put on your hacker hat :-).
*** This is a Security Bloggers Network syndicated blog from Carnal0wnage & Attack Research Blog authored by cktricky. Read the original post at: www.cronistalascolonias.com.ar
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