“Typically, the threat actor initially exploits the Log4j vulnerability to run PowerShell commands directly, and then runs further commands by means of PS reverse shells, executed via the Tomcat process.”Īpache Tomcat is an open source Web server that VMware and other enterprise software use to deploy and serve Java-based Web apps. “TunnelVision attackers have been actively exploiting the vulnerability to run malicious PowerShell commands, deploy backdoors, create backdoor users, harvest credentials, and perform lateral movement,” company researchers Amitai Ben Shushan Ehrlich and Yair Rigevsky wrote in a post. The SentinelOne research shows that the targeting continues and that this time the target is organizations running VMware Horizon, a desktop and app virtualization product that runs on Windows, macOS, and Linux. The bug bit the Internet’s biggest players and was widely targeted in the wild after it became known.
CVE-2021-44228 (or Log4Shell, as the vulnerability is tracked or nicknamed) allows attackers to easily gain remote control over computers running apps in the Java programming language. Recently, SentinelOne reported, TunnelVision has started exploiting a critical vulnerability in Log4j, an open source logging utility that’s integrated into thousands of apps. Vulnerabilities in Fortinet FortiOS (CVE-2018-13379) and Microsoft Exchange (ProxyShell) are two of the group’s better-known targets. In the past, TunnelVision has exploited so-called 1-day vulnerabilities-meaning vulnerabilities that have been recently patched-to hack organizations that have yet to install the fix. The name is meant to emphasize TunnelVision’s heavy reliance on tunneling tools and the unique way it deploys them. Security firm SentinelOne has dubbed the group TunnelVision. Hackers aligned with the government of Iran are exploiting the critical Log4j vulnerability to infect unpatched VMware users with ransomware, researchers said on Thursday.
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