The page documenting the malware it targets (see above), shows only two strains were added in all of 2017. On the other hand, MSRT is very limited in scope. You make a copy of MRT.exe on a non-infected PC, rename it to SomethingElse.exe for good luck, and run a full scan with it on an infected machine. The 32bit edition is currently Windows-KB890830-V5.48.exe, the 64 bit edition is Windows-KB890830-圆4-V5.48.exe.Ī nice thing about MSRT is that it's portable. MSRT can be downloaded at any time from here. When its run as part of Windows Update, it only does a Quick scan. Running it manually offers the option of a Full scan. When you run it manually, the initial window has a link to "View a list of malicious software that this tool detects and removes." The May 22nd version includes Win32/WannaCrypt in this list, the May 9th version does not. Or, you can find it at C:\Windows\system32\MRT.exe You can run MSRT manually by simply typing "MRT" into the Run box. MSRT is generally released monthly as part of Windows Update or as a standalone tool available here for download.
MSRT finds and removes threats and reverses the changes made by these threats. However, when asked, a company representative said that the May 22nd update was "to detect and remove WannaCrypt malware." WannaCrypt is another name for WannaCry. Windows Malicious Software Removal Tool (MSRT) helps keep Windows computers free from prevalent malware. What changed? Initially, Microsoft didn't say, the home page for MSRT, had not been updated as of the 25th. According to the C:Windowsdebugmrt.log, C:WindowsSystem32MRT. The May 9th edition is 149MB (156,335,152 bytes), the May 22nd version is 126MB (132,223,576 bytes). The update KB890830 is not installed on this computer. The May 9th release was version 1, the May 22nd edition is version 3. Sure enough, running Windows Update on the 25th, installed a new version of the software (shown above). I checked a 64 bit Windows 7 machine that had been updated on the 21st. Windows Update installed MSRT on May 21st and then again on May 25th
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