Wallet Logo

Unstoppable - Invest In Crypto

latest release: 0.18.2 last analysed  19th January 2021
Reproducible when tested
4.4 ★★★★★
305 ratings
5thousand
18th December 2018

Published:

Our last analysis is based on data found in their Google Play description and their website and their source repository.
details below 

Older reviews (show 10 of 15 reproducible)

Help spread awareness for build reproducibility

Please follow Unstoppable - Invest In Crypto and thank them for being reproducible via their Twitter!

Disclaimer

The following Analysis is not a full code review! We plan to make code reviews available in the future but even then it will never be a stamp of approval but rather a list of incidents and questionable coding practice. Nasa sends probes to space that crash due to software bugs despite a huge budget and stringent scrutiny.

Do your own research!

Try out searching for "lost bitcoins", "stole my money" or "scammers" together with the wallet's name, even if you think the wallet is generally trustworthy. For all the bigger wallets you will find accusations. Make sure you understand why they were made and if you are comfortable with the provider's reaction.

The Analysis

Here is the output using our test script on the binary from Google Play:

Results:
appId:          io.horizontalsystems.bankwallet
signer:         c1899493e440489178b8748851b72cbed50c282aaa8c03ae236a4652f8c4f27b
apkVersionName: 0.18.2
apkVersionCode: 38
apkHash:        5d6cbade37070420b24da421cea93b8591e3709a8d92dc70f2b8b02e1688e7b5

Diff:
Files /tmp/fromPlay_io.horizontalsystems.bankwallet_38/apktool.yml and /tmp/fromBuild_io.horizontalsystems.bankwallet_38/apktool.yml differ
Only in /tmp/fromPlay_io.horizontalsystems.bankwallet_38/original/META-INF: MANIFEST.MF
Only in /tmp/fromPlay_io.horizontalsystems.bankwallet_38/original/META-INF: RELEASEK.RSA
Only in /tmp/fromPlay_io.horizontalsystems.bankwallet_38/original/META-INF: RELEASEK.SF

Revision, tag (and its signature):

That’s how it should look like to give it the verdict: reproducible.

Thank you to Horizontal Systems for a donation of $200.

Verdict Explained

Reproducible when tested
At the time of this analysis, the app on Google Play was reproducible from the code provided by the developers!

The app can be independently verified. If the provider puts your funds at risk on purpose or by accident, security researchers can see this if they care to look. It also means that inside the company engineers can verify that the release manager is releasing the app based on code known to all engineers on the team. A scammer would have to work under the potential eyes of security researchers. He would have to take more effort in hiding any exploit.

"Reproducible" does not mean "verified". There is good reason to believe that security researchers as of today would not detect very blatant backdoors in the public source code before it gets exploited, much less if the attacker takes moderate efforts to hide it.

To understand why some lines of difference are ok and others not one has to consider how app signing works. Android supports currently 3 signing schemes and in version 1 signing the signature is put inside the application file. As the tester must not have the release signing key, those files necessarily are missing or differ from the version on Google Play. The file "apktool.yml" was never part of the app and is generated by the analysis tool "apktool".