![]() The above command skips the first block from the input file, which is the header part of our Android backup. This can be done as shown below.ĭd if=mybackup.ab bs=24 skip=1| openssl zlib -d > mybackup.tar So, we will use the dd tool to remove the first 24 bytes and create a tar file of the remaining part. Usually, the first 24 bytes will be the header. Once we confirm, it will create an Android backup file with an ".ab" extension. ![]() So, let us open the device and confirm the backup operation as shown below. This will save the data in an XML file.Īs we did in the previous article, let us first take the backup of our target application using the command shown below.Īdb backup -f mybackup.ab Īs we can see in the figure above, it is prompting us to confirm the backup operation on the device. Launch our target application on a non rooted device and enter some data as shown in the figure below. The sample application used in this article can be downloaded from the downloads section. In this article, we will take a sample application and see how we can modify the content of an app on a non rooted device practically. If you want to know more about it, please refer to that article. This whole process is well covered in the XDA forums thread given in the references section. Though these steps look simple, this involves slightly complex techniques when we try attacking the application. Step 6: Restore the backup with the modified content.Step 5: Append the modified content to the header.Step 4: Get the header part from the original ".ab" file. ![]()
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