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    Windows 10 Defender Won't Start After Malware or Ransomware

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    defender anti-virus windows windows 10 malware ransomware
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    • DanpD
      Danp @RojoLoco
      last edited by

      @RojoLoco Click the link and read for yourself. Also this -- https://www.cybereason.com/hubfs/ransomfree-EOL-message.pdf

      RojoLocoR 1 Reply Last reply Reply Quote 3
      • dbeatoD
        dbeato @scottalanmiller
        last edited by

        @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

        @dbeato said in Windows 10 Defender Won't Start After Malware or Ransomware:

        @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

        @Dashrender said in Windows 10 Defender Won't Start After Malware or Ransomware:

        @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

        @DustinB3403 said in Windows 10 Defender Won't Start After Malware or Ransomware:

        @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

        @DustinB3403 said in Windows 10 Defender Won't Start After Malware or Ransomware:

        I would think that Windows 10 Defender should continue working during and after malware or ransomware. Rather than just giving up and not operating.

        No application keeps working once it has been disabled.

        Nothing on the computer works if Defender is disabled? I've not seen that before.

        "Application" is the antecedent. Not "Defender."

        i.e. the ransomware disabled Defender

        Or Sophos did. Hard to tell. We saw the same disablement where there was no infection.

        What version of Sophos? and did it have Intercept X?

        Didn't check, but probably older. We were just removing it.

        I was just asking as we use Sophos and we have seen advert some ransomware or other infections pretty much all the time. So it would be cool to know which ransomware variant was causing this.

        scottalanmillerS 1 Reply Last reply Reply Quote 0
        • scottalanmillerS
          scottalanmiller @dbeato
          last edited by

          @dbeato said in Windows 10 Defender Won't Start After Malware or Ransomware:

          @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

          @dbeato said in Windows 10 Defender Won't Start After Malware or Ransomware:

          @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

          @Dashrender said in Windows 10 Defender Won't Start After Malware or Ransomware:

          @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

          @DustinB3403 said in Windows 10 Defender Won't Start After Malware or Ransomware:

          @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

          @DustinB3403 said in Windows 10 Defender Won't Start After Malware or Ransomware:

          I would think that Windows 10 Defender should continue working during and after malware or ransomware. Rather than just giving up and not operating.

          No application keeps working once it has been disabled.

          Nothing on the computer works if Defender is disabled? I've not seen that before.

          "Application" is the antecedent. Not "Defender."

          i.e. the ransomware disabled Defender

          Or Sophos did. Hard to tell. We saw the same disablement where there was no infection.

          What version of Sophos? and did it have Intercept X?

          Didn't check, but probably older. We were just removing it.

          I was just asking as we use Sophos and we have seen advert some ransomware or other infections pretty much all the time. So it would be cool to know which ransomware variant was causing this.

          Sophos is the primary thing causing this issue for us. It crippled Windows so that even if you removed it, other AV would keep breaking. Really makes me wary of Sophos.

          dbeatoD 1 Reply Last reply Reply Quote 0
          • dbeatoD
            dbeato @scottalanmiller
            last edited by

            @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

            @dbeato said in Windows 10 Defender Won't Start After Malware or Ransomware:

            @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

            @dbeato said in Windows 10 Defender Won't Start After Malware or Ransomware:

            @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

            @Dashrender said in Windows 10 Defender Won't Start After Malware or Ransomware:

            @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

            @DustinB3403 said in Windows 10 Defender Won't Start After Malware or Ransomware:

            @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

            @DustinB3403 said in Windows 10 Defender Won't Start After Malware or Ransomware:

            I would think that Windows 10 Defender should continue working during and after malware or ransomware. Rather than just giving up and not operating.

            No application keeps working once it has been disabled.

            Nothing on the computer works if Defender is disabled? I've not seen that before.

            "Application" is the antecedent. Not "Defender."

            i.e. the ransomware disabled Defender

            Or Sophos did. Hard to tell. We saw the same disablement where there was no infection.

            What version of Sophos? and did it have Intercept X?

            Didn't check, but probably older. We were just removing it.

            I was just asking as we use Sophos and we have seen advert some ransomware or other infections pretty much all the time. So it would be cool to know which ransomware variant was causing this.

            Sophos is the primary thing causing this issue for us. It crippled Windows so that even if you removed it, other AV would keep breaking. Really makes me wary of Sophos.

            There is a removal tool for this... AV are meant to not be tampered with which is probably what Sophos did. That is one thing that Sophos does, there is no way to properly uninstall it without a tamper protection password or removal.

            scottalanmillerS 1 Reply Last reply Reply Quote 1
            • scottalanmillerS
              scottalanmiller @dbeato
              last edited by

              @dbeato said in Windows 10 Defender Won't Start After Malware or Ransomware:

              @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

              @dbeato said in Windows 10 Defender Won't Start After Malware or Ransomware:

              @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

              @dbeato said in Windows 10 Defender Won't Start After Malware or Ransomware:

              @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

              @Dashrender said in Windows 10 Defender Won't Start After Malware or Ransomware:

              @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

              @DustinB3403 said in Windows 10 Defender Won't Start After Malware or Ransomware:

              @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

              @DustinB3403 said in Windows 10 Defender Won't Start After Malware or Ransomware:

              I would think that Windows 10 Defender should continue working during and after malware or ransomware. Rather than just giving up and not operating.

              No application keeps working once it has been disabled.

              Nothing on the computer works if Defender is disabled? I've not seen that before.

              "Application" is the antecedent. Not "Defender."

              i.e. the ransomware disabled Defender

              Or Sophos did. Hard to tell. We saw the same disablement where there was no infection.

              What version of Sophos? and did it have Intercept X?

              Didn't check, but probably older. We were just removing it.

              I was just asking as we use Sophos and we have seen advert some ransomware or other infections pretty much all the time. So it would be cool to know which ransomware variant was causing this.

              Sophos is the primary thing causing this issue for us. It crippled Windows so that even if you removed it, other AV would keep breaking. Really makes me wary of Sophos.

              There is a removal tool for this... AV are meant to not be tampered with which is probably what Sophos did. That is one thing that Sophos does, there is no way to properly uninstall it without a tamper protection password or removal.

              That's how we describe ransomware!

              Getting Sophos to stop scanning isn't an issue, it's getting Sophos to allow legitimate scanning is the issue!

              dbeatoD 1 Reply Last reply Reply Quote 0
              • dbeatoD
                dbeato @scottalanmiller
                last edited by

                @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

                @dbeato said in Windows 10 Defender Won't Start After Malware or Ransomware:

                @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

                @dbeato said in Windows 10 Defender Won't Start After Malware or Ransomware:

                @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

                @dbeato said in Windows 10 Defender Won't Start After Malware or Ransomware:

                @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

                @Dashrender said in Windows 10 Defender Won't Start After Malware or Ransomware:

                @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

                @DustinB3403 said in Windows 10 Defender Won't Start After Malware or Ransomware:

                @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

                @DustinB3403 said in Windows 10 Defender Won't Start After Malware or Ransomware:

                I would think that Windows 10 Defender should continue working during and after malware or ransomware. Rather than just giving up and not operating.

                No application keeps working once it has been disabled.

                Nothing on the computer works if Defender is disabled? I've not seen that before.

                "Application" is the antecedent. Not "Defender."

                i.e. the ransomware disabled Defender

                Or Sophos did. Hard to tell. We saw the same disablement where there was no infection.

                What version of Sophos? and did it have Intercept X?

                Didn't check, but probably older. We were just removing it.

                I was just asking as we use Sophos and we have seen advert some ransomware or other infections pretty much all the time. So it would be cool to know which ransomware variant was causing this.

                Sophos is the primary thing causing this issue for us. It crippled Windows so that even if you removed it, other AV would keep breaking. Really makes me wary of Sophos.

                There is a removal tool for this... AV are meant to not be tampered with which is probably what Sophos did. That is one thing that Sophos does, there is no way to properly uninstall it without a tamper protection password or removal.

                That's how we describe ransomware!

                Getting Sophos to stop scanning isn't an issue, it's getting Sophos to allow legitimate scanning is the issue!

                I can see where it resembles the behavior of a ransomware, same will be for Webroot, they are extremely hard to remove unless you go to SafeMode to remove them. That is one of the ways the combat said ransomware or Malware.

                scottalanmillerS 1 Reply Last reply Reply Quote 0
                • scottalanmillerS
                  scottalanmiller @dbeato
                  last edited by

                  @dbeato said in Windows 10 Defender Won't Start After Malware or Ransomware:

                  @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

                  @dbeato said in Windows 10 Defender Won't Start After Malware or Ransomware:

                  @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

                  @dbeato said in Windows 10 Defender Won't Start After Malware or Ransomware:

                  @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

                  @dbeato said in Windows 10 Defender Won't Start After Malware or Ransomware:

                  @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

                  @Dashrender said in Windows 10 Defender Won't Start After Malware or Ransomware:

                  @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

                  @DustinB3403 said in Windows 10 Defender Won't Start After Malware or Ransomware:

                  @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

                  @DustinB3403 said in Windows 10 Defender Won't Start After Malware or Ransomware:

                  I would think that Windows 10 Defender should continue working during and after malware or ransomware. Rather than just giving up and not operating.

                  No application keeps working once it has been disabled.

                  Nothing on the computer works if Defender is disabled? I've not seen that before.

                  "Application" is the antecedent. Not "Defender."

                  i.e. the ransomware disabled Defender

                  Or Sophos did. Hard to tell. We saw the same disablement where there was no infection.

                  What version of Sophos? and did it have Intercept X?

                  Didn't check, but probably older. We were just removing it.

                  I was just asking as we use Sophos and we have seen advert some ransomware or other infections pretty much all the time. So it would be cool to know which ransomware variant was causing this.

                  Sophos is the primary thing causing this issue for us. It crippled Windows so that even if you removed it, other AV would keep breaking. Really makes me wary of Sophos.

                  There is a removal tool for this... AV are meant to not be tampered with which is probably what Sophos did. That is one thing that Sophos does, there is no way to properly uninstall it without a tamper protection password or removal.

                  That's how we describe ransomware!

                  Getting Sophos to stop scanning isn't an issue, it's getting Sophos to allow legitimate scanning is the issue!

                  I can see where it resembles the behavior of a ransomware, same will be for Webroot, they are extremely hard to remove unless you go to SafeMode to remove them. That is one of the ways the combat said ransomware or Malware.

                  Yeah, except the Sophos got infected as one of our "ground zero" machines, and it looks like Sophos' behaviour might have been a contributing factor to the broader spread of it.

                  dbeatoD 1 Reply Last reply Reply Quote 0
                  • dbeatoD
                    dbeato @scottalanmiller
                    last edited by dbeato

                    @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

                    @dbeato said in Windows 10 Defender Won't Start After Malware or Ransomware:

                    @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

                    @dbeato said in Windows 10 Defender Won't Start After Malware or Ransomware:

                    @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

                    @dbeato said in Windows 10 Defender Won't Start After Malware or Ransomware:

                    @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

                    @dbeato said in Windows 10 Defender Won't Start After Malware or Ransomware:

                    @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

                    @Dashrender said in Windows 10 Defender Won't Start After Malware or Ransomware:

                    @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

                    @DustinB3403 said in Windows 10 Defender Won't Start After Malware or Ransomware:

                    @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

                    @DustinB3403 said in Windows 10 Defender Won't Start After Malware or Ransomware:

                    I would think that Windows 10 Defender should continue working during and after malware or ransomware. Rather than just giving up and not operating.

                    No application keeps working once it has been disabled.

                    Nothing on the computer works if Defender is disabled? I've not seen that before.

                    "Application" is the antecedent. Not "Defender."

                    i.e. the ransomware disabled Defender

                    Or Sophos did. Hard to tell. We saw the same disablement where there was no infection.

                    What version of Sophos? and did it have Intercept X?

                    Didn't check, but probably older. We were just removing it.

                    I was just asking as we use Sophos and we have seen advert some ransomware or other infections pretty much all the time. So it would be cool to know which ransomware variant was causing this.

                    Sophos is the primary thing causing this issue for us. It crippled Windows so that even if you removed it, other AV would keep breaking. Really makes me wary of Sophos.

                    There is a removal tool for this... AV are meant to not be tampered with which is probably what Sophos did. That is one thing that Sophos does, there is no way to properly uninstall it without a tamper protection password or removal.

                    That's how we describe ransomware!

                    Getting Sophos to stop scanning isn't an issue, it's getting Sophos to allow legitimate scanning is the issue!

                    I can see where it resembles the behavior of a ransomware, same will be for Webroot, they are extremely hard to remove unless you go to SafeMode to remove them. That is one of the ways the combat said ransomware or Malware.

                    Yeah, except the Sophos got infected as one of our "ground zero" machines, and it looks like Sophos' behaviour might have been a contributing factor to the broader spread of it.

                    Okay, again this your scenario in which I don't know what is going on. It is hard to see Sophos spreading this. but maybe you mean it allowed the ransomware to be spread because it did not do anything, correct?

                    scottalanmillerS 1 Reply Last reply Reply Quote 0
                    • scottalanmillerS
                      scottalanmiller @dbeato
                      last edited by

                      @dbeato said in Windows 10 Defender Won't Start After Malware or Ransomware:

                      @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

                      @dbeato said in Windows 10 Defender Won't Start After Malware or Ransomware:

                      @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

                      @dbeato said in Windows 10 Defender Won't Start After Malware or Ransomware:

                      @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

                      @dbeato said in Windows 10 Defender Won't Start After Malware or Ransomware:

                      @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

                      @dbeato said in Windows 10 Defender Won't Start After Malware or Ransomware:

                      @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

                      @Dashrender said in Windows 10 Defender Won't Start After Malware or Ransomware:

                      @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

                      @DustinB3403 said in Windows 10 Defender Won't Start After Malware or Ransomware:

                      @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

                      @DustinB3403 said in Windows 10 Defender Won't Start After Malware or Ransomware:

                      I would think that Windows 10 Defender should continue working during and after malware or ransomware. Rather than just giving up and not operating.

                      No application keeps working once it has been disabled.

                      Nothing on the computer works if Defender is disabled? I've not seen that before.

                      "Application" is the antecedent. Not "Defender."

                      i.e. the ransomware disabled Defender

                      Or Sophos did. Hard to tell. We saw the same disablement where there was no infection.

                      What version of Sophos? and did it have Intercept X?

                      Didn't check, but probably older. We were just removing it.

                      I was just asking as we use Sophos and we have seen advert some ransomware or other infections pretty much all the time. So it would be cool to know which ransomware variant was causing this.

                      Sophos is the primary thing causing this issue for us. It crippled Windows so that even if you removed it, other AV would keep breaking. Really makes me wary of Sophos.

                      There is a removal tool for this... AV are meant to not be tampered with which is probably what Sophos did. That is one thing that Sophos does, there is no way to properly uninstall it without a tamper protection password or removal.

                      That's how we describe ransomware!

                      Getting Sophos to stop scanning isn't an issue, it's getting Sophos to allow legitimate scanning is the issue!

                      I can see where it resembles the behavior of a ransomware, same will be for Webroot, they are extremely hard to remove unless you go to SafeMode to remove them. That is one of the ways the combat said ransomware or Malware.

                      Yeah, except the Sophos got infected as one of our "ground zero" machines, and it looks like Sophos' behaviour might have been a contributing factor to the broader spread of it.

                      Okay, again this your scenario in which I don't know what is going on. It is hard to see Sophos spreading this. but maybe you mean allowed it to be spread because it did not do anything, correct?

                      Right. It looks like because Sophos appears to have caused the legitimate antivirus to turn on, then immediately disable when the admin looked away, they thought that they were protected, but Sophos was regularly disabling the AV putting them at risk.

                      1 Reply Last reply Reply Quote 0
                      • scottalanmillerS
                        scottalanmiller
                        last edited by

                        On its own, where Sophos was the AV that was supposed to be running, it failed to stop the virus. That's not a huge thing, it's not the only AV that failed on that. No AV is perfect and they depend on the OS to be well configured to do their job. But it wasn't successful at protecting even where it was fully installed and running.

                        dbeatoD PhlipElderP 2 Replies Last reply Reply Quote 0
                        • dbeatoD
                          dbeato @scottalanmiller
                          last edited by

                          @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

                          On its own, where Sophos was the AV that was supposed to be running, it failed to stop the virus. That's not a huge thing, it's not the only AV that failed on that. No AV is perfect and they depend on the OS to be well configured to do their job. But it wasn't successful at protecting even where it was fully installed and running.

                          Understood, good to see the clear picture as I am trying to see both sides of what is good and what is not.

                          1 Reply Last reply Reply Quote 0
                          • PhlipElderP
                            PhlipElder @scottalanmiller
                            last edited by

                            @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

                            On its own, where Sophos was the AV that was supposed to be running, it failed to stop the virus. That's not a huge thing, it's not the only AV that failed on that. No AV is perfect and they depend on the OS to be well configured to do their job. But it wasn't successful at protecting even where it was fully installed and running.

                            Traditional A/V is dead. It's a legal placebo.

                            What it's replacement is beyond user training and termination for doing something they shouldn't is beyond me at this point.

                            scottalanmillerS 1 Reply Last reply Reply Quote 0
                            • scottalanmillerS
                              scottalanmiller @PhlipElder
                              last edited by

                              @PhlipElder said in Windows 10 Defender Won't Start After Malware or Ransomware:

                              @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

                              On its own, where Sophos was the AV that was supposed to be running, it failed to stop the virus. That's not a huge thing, it's not the only AV that failed on that. No AV is perfect and they depend on the OS to be well configured to do their job. But it wasn't successful at protecting even where it was fully installed and running.

                              Traditional A/V is dead. It's a legal placebo.

                              This is why I like Defender. A placebo should be free and not get in the way.

                              PhlipElderP 1 Reply Last reply Reply Quote 0
                              • PhlipElderP
                                PhlipElder @scottalanmiller
                                last edited by

                                @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

                                @PhlipElder said in Windows 10 Defender Won't Start After Malware or Ransomware:

                                @scottalanmiller said in Windows 10 Defender Won't Start After Malware or Ransomware:

                                On its own, where Sophos was the AV that was supposed to be running, it failed to stop the virus. That's not a huge thing, it's not the only AV that failed on that. No AV is perfect and they depend on the OS to be well configured to do their job. But it wasn't successful at protecting even where it was fully installed and running.

                                Traditional A/V is dead. It's a legal placebo.

                                This is why I like Defender. A placebo should be free and not get in the way.

                                We were working with a contractor that uses AVG's RMM setup (I think it's been sold now).

                                WDAV flagged the executable as a virus and clamped it down a few days later. That freaked me right out so we went through a process with AVG to figure out what was happening.

                                WDAV started flagging all of our RMM .EXE files. That's when it became clear that they were false positives. But, that does not make up for the stress that happened initially. 😛

                                1 Reply Last reply Reply Quote 0
                                • RojoLocoR
                                  RojoLoco @Danp
                                  last edited by

                                  @Danp said in Windows 10 Defender Won't Start After Malware or Ransomware:

                                  @RojoLoco Click the link and read for yourself. Also this -- https://www.cybereason.com/hubfs/ransomfree-EOL-message.pdf

                                  Well damn...

                                  1 Reply Last reply Reply Quote 0
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