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Google finds custom backdoor being installed on SonicWall network devices

Researchers from the Google Threat Intelligence Group said that hackers are compromising SonicWall Secure Mobile Access (SMA) appliances, which sit at the edge of enterprise networks and manage and secure access by mobile devices. The targeted devices are end of life, meaning they no longer receive regular updates for stability and security. Despite the status, many organizations continue to rely on them. That has left them prime targets by UNC6148, the name Google has given to the unknown hack

SonicWall SMA devices hacked with OVERSTEP rootkit tied to ransomware

A threat actor has been deploying a previously unseen malware called OVERSTEP that modifies the boot process of fully-patched but no longer supported SonicWall Secure Mobile Access appliances. The backdoor is a user-mode rootkit that allows hackers to hide malicious components, maintain persistent access on the device, and steal sensitive credentials. Researchers at Google Threat Intelligence Group (GTIG) observed the rootkit in attacks that may have relied on “an unknown, zero-day remote code