Thanks! This was very useful :)
On Thu, May 23, 2013 at 3:02 AM, Kristopher Micinski <[email protected] > wrote: > It absolutely will, I thought you just meant repacking it, which is > what I just described, what you're talking about is more like > rewriting. > > The answer to that is that they use a tool to modify the bytecode. > You can use a few options: convert it to java bytecode, do the mods, > and then convert back via dex, or manipulate the bytecode directly. > There are a bunch of tools that do this, baksmali is also a popular > choice for disassembly. You can google around to find tools that meet > your needs, but I've also worked on a binary rewriter for Android that > is relatively mature: > > https://github.com/plum-umd/redexer > > Kris > > On Wed, May 22, 2013 at 5:18 PM, Ishan Sharma <[email protected]> > wrote: > > But the .dex file is in byte code which has a certain structure. If we > > manipulate that .dex file won't it break the code? > > > > > > On Thu, May 23, 2013 at 1:40 AM, Kristopher Micinski > > <[email protected]> wrote: > >> > >> The APK is simply a zip file: nothing more. > >> > >> It's pretty typical to take a legitimate app and unzip it, add some > >> code, and repacking it (just zipping it up as an APK). > >> > >> There's not really much to add, the standard tools in the Android SDK > >> do all of this for you, > >> > >> Kris > >> > >> On Wed, May 22, 2013 at 12:39 PM, Ishan Sharma < > [email protected]> > >> wrote: > >> > Is there anyone who can help? > >> > > >> > Thanks! > >> > > >> > On Sat, May 18, 2013 at 10:46 PM, Ishan Sharma > >> > <[email protected]> > >> > wrote: > >> >> > >> >> Hello! > >> >> > >> >> I am a research student working on Android Security. I have been > >> >> reading > >> >> some research papers related to android malwares and all the research > >> >> papers > >> >> mention that most of the malware is developed by "repackaging" a > benign > >> >> binary. There have also been research papers to detect repackaged > >> >> applications. Could someone please tell me what is .apk file > >> >> repackaging > >> >> (binary repackaging). Also how can I repackage .apk files? Since they > >> >> are > >> >> binary files any modification done to them could break the > application. > >> >> > >> >> Any links etc. which explain how to perform .apk file repackaging > will > >> >> also be very good. > >> >> > >> >> > >> >> Thanks > >> >> > >> >> -- > >> >> -- > >> >> You received this message because you are subscribed to the Google > >> >> Groups "Android Developers" group. > >> >> To post to this group, send email to > >> >> [email protected] > >> >> To unsubscribe from this group, send email to > >> >> [email protected] > >> >> For more options, visit this group at > >> >> http://groups.google.com/group/android-developers?hl=en > >> >> --- > >> >> You received this message because you are subscribed to a topic in > the > >> >> Google Groups "Android Developers" group. > >> >> To unsubscribe from this topic, visit > >> >> > >> >> > https://groups.google.com/d/topic/android-developers/mG2ON1L3IHg/unsubscribe?hl=en > . > >> >> To unsubscribe from this group and all its topics, send an email to > >> >> [email protected]. > >> >> > >> >> For more options, visit https://groups.google.com/groups/opt_out. > >> >> > >> >> > >> > > >> > > >> > -- > >> > -- > >> > You received this message because you are subscribed to the Google > >> > Groups "Android Developers" group. > >> > To post to this group, send email to > [email protected] > >> > To unsubscribe from this group, send email to > >> > [email protected] > >> > For more options, visit this group at > >> > http://groups.google.com/group/android-developers?hl=en > >> > --- > >> > You received this message because you are subscribed to the Google > >> > Groups > >> > "Android Developers" group. > >> > To unsubscribe from this group and stop receiving emails from it, send > >> > an > >> > email to [email protected]. > >> > For more options, visit https://groups.google.com/groups/opt_out. > >> > > >> > > >> > >> -- > >> -- > >> You received this message because you are subscribed to the Google > >> Groups "Android Developers" group. > >> To post to this group, send email to > [email protected] > >> To unsubscribe from this group, send email to > >> [email protected] > >> For more options, visit this group at > >> http://groups.google.com/group/android-developers?hl=en > >> --- > >> You received this message because you are subscribed to a topic in the > >> Google Groups "Android Developers" group. > >> To unsubscribe from this topic, visit > >> > https://groups.google.com/d/topic/android-developers/mG2ON1L3IHg/unsubscribe?hl=en > . > >> To unsubscribe from this group and all its topics, send an email to > >> [email protected]. > >> For more options, visit https://groups.google.com/groups/opt_out. > >> > >> > > > > -- > > -- > > You received this message because you are subscribed to the Google > > Groups "Android Developers" group. > > To post to this group, send email to [email protected] > > To unsubscribe from this group, send email to > > [email protected] > > For more options, visit this group at > > http://groups.google.com/group/android-developers?hl=en > > --- > > You received this message because you are subscribed to the Google Groups > > "Android Developers" group. > > To unsubscribe from this group and stop receiving emails from it, send an > > email to [email protected]. > > For more options, visit https://groups.google.com/groups/opt_out. > > > > > > -- > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en > --- > You received this message because you are subscribed to a topic in the > Google Groups "Android Developers" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/android-developers/mG2ON1L3IHg/unsubscribe?hl=en > . > To unsubscribe from this group and all its topics, send an email to > [email protected]. > For more options, visit https://groups.google.com/groups/opt_out. > > > -- -- You received this message because you are subscribed to the Google Groups "Android Developers" group. 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