Malware is a new kind of Android malware that disguises itself as innocent-looking photo editing, adult entertainment, or gaming apps. Malware takes advantage of multiple Android vulnerabilities, such as the Janus flaw and the Man-in-the-Disk flaw, and injects malicious code into the APK files of targeted apps installed on a compromised device and then automatically re-install/updates them without the victims’ knowledge or interaction. The malware, which researchers believe is tied to a China-based firm, has been designed for financial gain.
Source: https://thehackernews.com/2019/07/whatsapp-android-malware.html