
Headline
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
A simple APK, reverse engineer the logic, recreate the flag, and submit!
First 10 Solvers
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1 |
TheSuperFlight
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2 | 0utWrest |
3 | xvenom |
4 | V4vernon |
5 | ill_advisor |
Rank | Username |
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6 | Krzyychuu |
7 | XhonC |
8 | s10th |
9 | ebouteillon |
10 | playerone |
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Hello camus_,
Java (the language android apps are built in) has the near unique property of being reversible to almost the exact code it was built from. As such a good place to begin on challenges like this one are to decompile the app into a human readable form. I prefer Jadx-gui on a Kali linux install but there are also some online decompilers like this one http://www.javadecompilers.com/apk
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silkim
man this was fun
EasyDonkey
[REDACTED] This comment is only shown to users who have solved this challenge.
jluna
[REDACTED] This comment is only shown to users who have solved this challenge.
AntonioCaesar
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Bensnappy
Really fun challenge and a good intro to android reverse engineering, although I wish I'd read through more of the comments sooner. I ended up trying to brute force the hash stuff for a little while before I realized there were probably websites for that.
rokka
Nice. Great fun! Thank you!
bt7274
This is a good one. You can use apktool on linux, but use it only if you are a little familiar with assembly. Otherwise use one of the online tools mentioned in the comment.
c0conut
First time trying to deal with a RE task. A nice task for beginner!
elliot_pwn
This was nice . Learned something new!
V1L3N
My first RE challenge, took me a lot of time and help but still it was fun to solve!