“Anecdotally, from what we’re seeing in the field, it does appear that EDR bypass is becoming a more popular technique for ransomware threat groups. And, because ETW is used by so many different providers, BlackByte’s pool of potential targets for deploying this EDR bypass is enormous,” commented Christopher Budd, senior manager, threat research, Sophos. If the guard goes down, then that leaves the rest of the system extremely vulnerable. “If you think of computers as a fortress, for many EDR providers, ETW is the guard at the front gate.
EDR vendors frequently use this feature to monitor the use of commonly maliciously abused API calls if this feature is disabled, the EDR vendors that rely on this feature are also rendered ineffective. This particular vulnerability allows them to communicate directly with the targeted system’s kernel, commanding it to disable callback routines used by EDR providers, as well as the ETW (Event Tracing for Windows) Microsoft-Windows-Threat-Intelligence-Provider. Specifically, they’ve been abusing a vulnerability in RTCorec6.sys, a graphics utility driver for Windows systems. Now, it appears that the group has added new attack methods, as well. Sophos details the attack tactics, techniques and procedures (TTPs) in the report, “ Remove all the Callbacks – BlackByte Ransomware Disables EDR via RTCore64.sys Abuse.”īlackByte, featured in a Secret Service and FBI special advisory earlier this year as a threat to critical infrastructure, reemerged in May from a brief hiatus with a new leak site and new extortion tactics. 04, 2022 (GLOBE NEWSWIRE) - Sophos, a global leader in next-generation cybersecurity, today announced that BlackByte, one of the newer, “heavy-hitter” ransomware gangs, has added a sophisticated “Bring Your Own Driver” technique to bypass more than 1,000 drivers used by industry Endpoint Detection and Response (EDR) products. Double-click the Remove Sophos Anti-Virus application and follow any on-screen instructions.OXFORD, United Kingdom, Oct.Unzip the downloaded tool if your browser has not automatically unzipped it.Download the Removal Tool for Sophos Anti-Virus.Use the Standalone Sophos Anti-Virus Removal tool.
If the regular uninstaller does not work or if you deleted the built-in removal program, the next method provides a standalone tool to remove the installed Sophos Anti-Virus. Note: Sophos Anti-Virus will not uninstall by dragging it from the Applications folder to the Trash. Note: If the tool exists and not been moved to Trash, Spotlight will find it
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