We observed a new cryptocurrency-mining botnet that arrives via open ADB (Android Debug Bridge) ports and can spread via SSH. This attack takes advantage of the way open ADB ports don’t have authentication by default, similar to the Satori botnet variant we previously reported. This malware’s design allows it to spread from the infected host to any system that has had a previous SSH connection with the host.
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We analyzed a fileless banking trojan targeting three major banks in Brazil and their customers, downloading info stealers, keyloggers and a hack tool. Infected machines can be used for a botnet and mass mailed targeted attacks, and our telemetry recorded the highest infection attempts from Brazil and Taiwan.
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We found a new Mirai variant we’ve called Yowai and Gafgyt variant Hakai abusing a ThinkPHP flaw for propagation and DDoS attacks.
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Several apps on Google Play posing as legitimate voice messenger platforms have automated functions such as fake survey pop-ups and fraudulent ad clicks. Observed variants were deployed one by one since October, with its evolution including evasive techniques and its infection behavior divided into several stages, as well as botnet codes possibly indicative of future attacks.
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Our findings homed in on known vulnerabilities, IoT botnets with top vulnerability detections, and devices that are affected.
From April 1 to May 15, we observed that 30 percent of home networks had at least one vulnerability detection. A detection would mean that we found at least one connected device being accessed through a vulnerability in the network. Our scanning covered different operating systems (OSs), including Linux, Mac, Windows, Android, iOS, and other software development kit (SDK) platforms.