Gigaset phones have been repeatedly infected with malware since the end of March. Malwarebytes has been supporting the threat as ‘Android/PUP.Riskware.Redstone’ Malwarewarebytes states that the ‘Trojan.Downloader.Agent.Agent’ app will download further malware on devices that are detected as. devices. Malicious gem app will display advertisements, install other malicious apps, and attempt to spread via WhatsApp messages. Only older models of the GS100, GS160,170, GS270 and GS370 series are potentially affected.
Source: https://www.bleepingcomputer.com/news/security/gigaset-android-phones-infected-by-malware-via-hacked-update-server/