Now it’s possible to set up the proxy and start intecepting any and all app traffic with Burp :) Mofiying and repackaging an app Lastly, we have to full reboot the device with either adb reboot or a power cycle.Īfter the device reboots, browsing to Settings -> Security -> Trusted Credentials should show the new “Portswigger CA” as a system trusted CA. Mv /sdcard/.0 /system/etc/security/cacerts/Ĭhmod 644 /system/etc/security/cacerts/.0 Use openssl to convert DER to PEM, then output the subject_hash_old and rename the file: Note: if you are using OpenSSL <1.0, it’s actually just the subject_hash, not the “old” one I saved it as rĪndroid wants the certificate to be in PEM format, and to have the filename equal to the subject_hash_old value appended with. Using Burp Suite, export the CA Certificate in DER format. The first step is to get the Burp CA in the right format. If we have root privileges, it’s possible to write to this location and drop in the Burp CA (after some modification). Trusted CAs for Android are stored in a special format in /system/etc/security/cacerts. You’ll see the similar CAs you’d see in a browser bundle. You can see all the system CAs that are bundled with an Android device by going to Settings -> Security -> Trusted Credentials and viewing system CAs. Since the “traditional” way of installing a user certificate doesn’t work anymore in Nougat and above, for me the easiest solution is to install the Burp CA to the system trusted certificates. Install Burp CA as a system-level trusted CA Note: I did all this with Burp Suite Pro on my Windows 10 machine and am using an Android 7.1 (API25) Genymotion VM, but the steps should be applicable to any setup. Slightly more work, but doesn’t require root privileges.
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