![]() It’s possible some unconfirmed files may get triggered in the GUI as infected on some scans, but it’s what is displayed at the end of the that really matters and determines whether you’re dealing with a possible infections. Select Virus & threat protection > Scan options. Important: Before you use Windows Defender Offline, make sure to save any open files and close apps and programs. Here's how to use it in Windows 10 to scan your PC. As a Microsoft employee hopefully he can give us more info soon.ĮDIT4: Response from Zero03 (Microsoft Employee in this thread):Īs long as the end of the scan shows everything is good, everything is good. Windows Security is a powerful scanning tool that finds and removes malware from your PC. Spun up a clean VM, ran MSERT - no "files infected".Ĭopied the Exchange 2019 Cumulative Update 8 ISO file onto the VM, ran MSERT and moments after it started scanning the ISO it marked 2 "files infected"ĮDIT3: Please keep an eye on zero03's replies in the thread. It seems like the latest MSERT is detecting false positives but the more people to confirm, the better.ĮDIT2: Well, confirmed. I've been freaking physically ill from the stress and uncertainty for days now.Īnyone else see this weird behaviour with the latest MSERT?ĮDIT: Anyone running into the same behaviour, please check the comments. ![]() I'm running the scan again now to see what happens but I'm just so done with all of this. We're about to go infect a VM with some malware to test the remediation, but it occurred to me that many people have already walked this road. ![]() We're looking at Microsoft Safety Scanner, McAfee Stinger or MalwareBytes (with purchased licenses). Literally nothing on the Exchange server has changed except that I've downloaded some baselines from Microsoft's own Git to run the CompareExchangeHashes.ps1 script. So we're looking at automating running a scan and remediation for low and medium malware detections. The scan completes and it says completed successfully and no viruses found. I also manually check for webshells, both come up clean except for 1 Autodiscover probe on 3-3 I already knew about. Meanwhile I check Test-ProxyLogon to verify there have been no additional probes. So my stomach drops and I wait for the scan to finish so I can see which files are infected. When the scan completed, it said that there were no viruses, spyware, or other potentially unwanted software detected. It's always come back clean but now suddenly mid-scan it displays "Files infected: 7". Jun 3, 2021, 9:12 AM I ran a Microsoft Security Scan and during the scan I could see that it had found 12 infected files. As in, I re-download the MSERT every day for most updated definitions. Due to the Exchange vulnerability I've been running an updated version of the MSERT scan every evening.
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