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CamScanner Application Removed from Play Store

CamScanner App Having Over 100 Million Downloads Removed From Google Play Store Due To Advertising Malware
The latest version of the CamScanner app lacks the malicious code in its resource files.
CamScanner app has more than 100 million downloads on the Play Store app.
Some users have already spotted the malicious behaviour in the CamScanner app.
The Trojan dropper module could be exploited for seeding the ads hereafter.

CamScanner is one of the most popular OCR apps out in the play store for Android devices.
Google Play Store has actively been weeding out apps who have been engaging in malicious behaviour ranging from ad fraud to seeding harmful code. But despite the vigilant approach, some malware loaded apps are still spotted from time to time and are booted off the app repository after accumulating in a tonne of downloads. The latest app to get booted from the Play Store is the CamScanner, an app that converts photos of documents into PDF format and is hugely popular among users. CamScanner was suspected to contain malware that could seed ads and prompt users into signing up for paid services.

As per the research of Kaspersky researchers, CamScanner’s recent versions shipped with an advertising library consisting of a malicious module. The malicious Trojan Dropper module, which has been identified as “Trojan-Dropper.AndroidOS.Necro.n”, has previously been noticed in some Chinese apps as well. What this module did is that, it extracted and ran another malicious module from an encrypted file that is found in the app’s resources.

Moreover, the resource-linked module, which is also known as “dropped” module, was found to be a Trojan downloader that downloaded even more harmful and malicious modules. Thereafter, it would depend on how a malicious party intends to exploit these modules. One possible used case scenario is that such a malicious module can show intrusive ads and also sign up users for other paid services. In the case of CamScanner app, which has over 100 million downloads, some users came across the app’s skeptical behaviour and posted reviews on the Play Store with the intention of preventing them from further downloading the CamScanner app.

Once the Kaspersky researchers acknowledged the advertising dropper in a recent version of the CamScanner app, they reported it and the app was immediately removed from the Play Store. It was also observed that the developers behind the CamScanner got rid of the module in the latest version of the app. But since different mobile phones might be running different versions of the app, some of which might contain the malicious code in its resource files, it is better to uninstall the app for time being and download it again only when it is back on the Play Store after all the due verification is completed .


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