NortonLifeLock, the NortonLifeLock Logo, the Checkmark Logo, Norton, LifeLock, and the LockMan Logo are trademarks or registered trademarks of NortonLifeLock Inc. LifeLock identity theft protection is not available in all countries.Ĭopyright © 2022 NortonLifeLock Inc. The Norton and LifeLock Brands are part of NortonLifeLock Inc. In my experience the turnaround time to have your FRST diagnostic logs analyzed by a malware removal specialist is usually a bit faster on the Malwarebytes site so I usually post there.ĭell Inspiron 5584 * 64-bit Win 10 Pro v21H2 build 19044.1889 * Firefox v104.0.0 * Microsoft Defender v.7-0.2 * Malwarebytes Premium v4.5.14.210- * Macrium Reflect Free v I have used the Malwarebytes and BleepingComputer malware removals site on different occasions and service on both sites was excellent. If they learn that you are cross-posting in multiple malware removal sites about the same problem your topic may be closed before they have finished diagnosing and cleaning your system. Just note that if you decide to use one of these malware removal sites post in ONE SITE ONLY and follow all instructions until the malware removal specialist assigned to assist you confirms your system is free of malware. There are other sites like BleepingComputer's Virus, Trojan, Spyware, and Malware Removal Help board that offer a free malware removal service from a trained specialist (see their posting guidelines pinned for collecting FRST diagnostic logs). You should only post in this forum if you have installed Malwarebytes and can provide a scan log to show that Malwarebytes was unable to detect and remove the "System Infected: Trojan.Backdoor Activity 690" threat. See the posting guidelines pinned that include instructions on how to collect and attach a Farbar Recovery Scan Tool (FRST) diagnostic logs to your initial post. If you believe you have malware on your system that both Norton and Malwarebytes can't detect I would recommend you post in the Malwarebytes' Windows Malware Removal Help & Support board and ask one of their trained malware removal specialists to check your system. If you have Norton Crypto turned on just turn it off and see if that stops the "System Infected: Trojan.Backdoor Activity 690" blocks. I know that Norton Crypto supports Ethereum crypto mining but Norton should not be detecting it's own Ethereum crypto miner as a backdoor trojan unless something has gone wrong with their heuristic (behaviour-based) detection system. This is just a guess on my part, but these Trojan.Backdoor Activity detections sometimes occur when you have unknowingly been infected with a cryptocurrency miner. The Symantec / Broadcom description for System Infected: Trojan.Backdoor Activity 690 is very generic and provides few details. The NPE is a very aggressive scanner and there is a warning on the NPE home page at that states in part "Because Norton Power Eraser is an aggressive virus removal tool, it may mark a legitimate program for removal."ĭell Inspiron 5584 * 64-bit Win 10 Pro v21H2 build 19044.1889 * Firefox v104.0.0 * Microsoft Defender v.7-0.2 * Malwarebytes Premium v4.5.13.208- * Macrium Reflect Free v NOTE: Please see my comments about the Norton Power Eraser (NPE). that might be detected by Malwarebytes that I actually want to keep.Ĭlick the blue Scan button in the main interface to run a standard Threat Scan, the recommended scan method that searches the most common system locations for higher-risk malware as well as lower-risk PUPs and PUMs. I also have Malwarebytes configured to warn me before it removes any PUPs or PUMs at Settings (gear icon) | Security | Potentially Unwanted Items so I have a chance to review any lower-risk threats like browser toolbars, etc. If you haven’t used Malwarebytes before I generally recommend that users deactivate the 14-trial trial of the Premium features after installation at Settings (gear icon) | Account | Deactivate (see Deactivate Premium Trial in Malwarebytes for Windows) and just use Malwarebytes Free as a second-opinion on-demand scanner. I’d suggest running a second-opinion scan with Malwarebytes Free for Windows v4.x ( since you have Win 7 SP1 or higher users with Win XP and Vista should go to to download the legacy Malwarebytes v3.5.1 for these older operating systems) to see if this scanner can find malware or a PUP (potentially unwanted program like adware, unwanted browser toolbars, etc.) or PUM (potentially unwanted registry modification) that might have been missed by your Norton antivirus. What is your default browser, and can you tell by the time stamp of these logged alerts if this block occurs when your browser is open and/or if you visit a specific web site?
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