Dark Tequila, which has been active since 2013, is highly modular and targets victims in Mexico.

The latest Android malware campaign to wend its way through Google’s Play marketplace can leverage victims’ phones for ad fraud, carry out DDoS attacks, send spam, and more, researchers warn. Dubbed Viking Horde, the campaign ropes Android devices into a botnet without their owners being any the wiser. A handful of apps that spread the...