Researchers say malware infects phones in order to sneak ads on devices for profit. Malware targets phones that have not been patched for a host of old vulnerabilities such as Janus, an Android flaw that dates back to 2017. Victims are enticed to download dropper program camouflaged as an image editor, porn-related app or game from a third-party app store. Researchers say each victim could have as many as 112 apps replaced on their handsets with ones that display rogue ads.
Source: https://threatpost.com/malware-agent-smith-android-ads/146359/