Found an APK inside another APK
for some testing purposes I use the Google Pixels 2 with the Android Version 8.0. Yes I know there is an Update to 9.0 but I do not want to right now.
On this Device there is the Google keep App (Pakage: com.google.android.keep) installed. I pulled this App via ADB, renamed to .zip and extracted it to a folder. Now I found another APK inside the /res/raw folder and I do not know why there is a second APK. Please explain to me why there is a second APK. Is there any security reason to do so? Also if I try to verify the signature I receive the error:
DOES NOT VERIFY
ERROR: APK Signature Scheme v2 signer #1: Malformed additional attribute #1
i used the apksignier but with jarsigner I do not receive any error. There i receive jar verified and some Warnings. Now I think its probably one of the Warnings which is causing my error with apksigner.
Warning:
This jar contains entries whoes certificate chain is invalid. Reason: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to request target.
and some Timestamp error which I do not think will cause the error. The algorithm which is used by this app is MD5withRSA. Maybe it throws the error because MD5withRSA is a security risk.
I also deinstalled the APK und reinstalled it via Google Playstore but it still contains two APKs and the signature failed too.
Every advice is appreciated.
EDIT:
It seems that this second APKs are Android-Wear OS APKs. Seems like the second APK problem is solved but i still get the signature error.
android google-apps android-security google-keep asked Nov 12 '18 at 8:01
XesrawXesraw
94
add a comment |
for some testing purposes I use the Google Pixels 2 with the Android Version 8.0. Yes I know there is an Update to 9.0 but I do not want to right now.
On this Device there is the Google keep App (Pakage: com.google.android.keep) installed. I pulled this App via ADB, renamed to .zip and extracted it to a folder. Now I found another APK inside the /res/raw folder and I do not know why there is a second APK. Please explain to me why there is a second APK. Is there any security reason to do so? Also if I try to verify the signature I receive the error:
DOES NOT VERIFY
ERROR: APK Signature Scheme v2 signer #1: Malformed additional attribute #1
i used the apksignier but with jarsigner I do not receive any error. There i receive jar verified and some Warnings. Now I think its probably one of the Warnings which is causing my error with apksigner.
Warning:
This jar contains entries whoes certificate chain is invalid. Reason: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to request target.
and some Timestamp error which I do not think will cause the error. The algorithm which is used by this app is MD5withRSA. Maybe it throws the error because MD5withRSA is a security risk.
I also deinstalled the APK und reinstalled it via Google Playstore but it still contains two APKs and the signature failed too.
Every advice is appreciated.
EDIT:
It seems that this second APKs are Android-Wear OS APKs. Seems like the second APK problem is solved but i still get the signature error.
android google-apps android-security google-keep asked Nov 12 '18 at 8:01
XesrawXesraw
94
add a comment |
for some testing purposes I use the Google Pixels 2 with the Android Version 8.0. Yes I know there is an Update to 9.0 but I do not want to right now.
On this Device there is the Google keep App (Pakage: com.google.android.keep) installed. I pulled this App via ADB, renamed to .zip and extracted it to a folder. Now I found another APK inside the /res/raw folder and I do not know why there is a second APK. Please explain to me why there is a second APK. Is there any security reason to do so? Also if I try to verify the signature I receive the error:
DOES NOT VERIFY
ERROR: APK Signature Scheme v2 signer #1: Malformed additional attribute #1
i used the apksignier but with jarsigner I do not receive any error. There i receive jar verified and some Warnings. Now I think its probably one of the Warnings which is causing my error with apksigner.
Warning:
This jar contains entries whoes certificate chain is invalid. Reason: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to request target.
and some Timestamp error which I do not think will cause the error. The algorithm which is used by this app is MD5withRSA. Maybe it throws the error because MD5withRSA is a security risk.
I also deinstalled the APK und reinstalled it via Google Playstore but it still contains two APKs and the signature failed too.
Every advice is appreciated.
EDIT:
It seems that this second APKs are Android-Wear OS APKs. Seems like the second APK problem is solved but i still get the signature error.
android google-apps android-security google-keep asked Nov 12 '18 at 8:01
XesrawXesraw
94
for some testing purposes I use the Google Pixels 2 with the Android Version 8.0. Yes I know there is an Update to 9.0 but I do not want to right now.
On this Device there is the Google keep App (Pakage: com.google.android.keep) installed. I pulled this App via ADB, renamed to .zip and extracted it to a folder. Now I found another APK inside the /res/raw folder and I do not know why there is a second APK. Please explain to me why there is a second APK. Is there any security reason to do so? Also if I try to verify the signature I receive the error:
DOES NOT VERIFY
ERROR: APK Signature Scheme v2 signer #1: Malformed additional attribute #1
i used the apksignier but with jarsigner I do not receive any error. There i receive jar verified and some Warnings. Now I think its probably one of the Warnings which is causing my error with apksigner.
Warning:
This jar contains entries whoes certificate chain is invalid. Reason: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to request target.
and some Timestamp error which I do not think will cause the error. The algorithm which is used by this app is MD5withRSA. Maybe it throws the error because MD5withRSA is a security risk.
I also deinstalled the APK und reinstalled it via Google Playstore but it still contains two APKs and the signature failed too.
Every advice is appreciated.
EDIT:
It seems that this second APKs are Android-Wear OS APKs. Seems like the second APK problem is solved but i still get the signature error.
android google-apps android-security google-keep android google-apps android-security google-keep asked Nov 12 '18 at 8:01
XesrawXesraw
94
asked Nov 12 '18 at 8:01
XesrawXesraw
94
edited Nov 15 '18 at 8:19
Xesraw
asked Nov 12 '18 at 8:01
XesrawXesraw
94
asked Nov 12 '18 at 8:01
XesrawXesraw
94
asked Nov 12 '18 at 8:01
XesrawXesraw
94
94
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