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Firefox 79 triggers Ransonware alert and removal


jdesquire
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Just installed Firefox 79 (downloaded from Mozilla's website).  The install file checks OK with Norton AntiVirus and MWB Premium.  Firefox installed without any issue.  It was the real-time ransomware protection in MWB that shut the program down.

What log file would you like to look at?

Many thanks.

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I ran the support tool, but it produces logs that either don't deal with the ransomware alert and/or contain confidential data.

I'll post the ArwDetections log that is referenced in MWB.  I think that's what you need to see.  Please let me know if there is another log you want to look at.

DCC6E120A0CA9AF0D229517A065D815E0F0D4DA603EE491DA81A0E9771C83B12
{
   "applicationVersion" : "4.1.2.73",
   "chromeSyncResetQueryRequested" : false,
   "chromeSyncResetQueryResult" : false,
   "clientID" : "",
   "clientType" : "other",
   "componentsUpdatePackageVersion" : "1.0.972",
   "cpu" : "x64",
   "dbSDKUpdatePackageVersion" : "1.0.26363",
   "detectionDateTime" : "2020-07-03T18:13:43Z",
   "fileSystem" : "NTFS",
   "id" : "ee09d2a6-bd58-11ea-998a-ac675d351b09",
   "isUserAdmin" : true,
   "licenseState" : "licensed",
   "linkagePhaseComplete" : false,
   "loggedOnUserName" : "System",
   "machineID" : "",
   "os" : "Windows 10 (Build 18362.900)",
   "schemaVersion" : 16,
   "sourceDetails" : {
      "type" : "arw"
   },
   "threats" : [
      {
         "ddsSigFileVersion" : "",
         "linkedTraces" : [

         ],
         "mainTrace" : {
            "archiveMember" : "",
            "archiveMemberMD5" : "",
            "cleanAction" : "block",
            "cleanResult" : "successful",
            "cleanResultErrorCode" : 0,
            "cleanTime" : "",
            "generatedByPostCleanupAction" : false,
            "id" : "ee2d929c-bd58-11ea-81bd-ac675d351b09",
            "isPEFile" : false,
            "linkType" : "none",
            "objectMD5" : "0e5fe8b00c8bbbb30a31a33d717d85f7",
            "objectPath" : "C:\\Firefox\\firefox.exe",
            "objectSha256" : "65e894c299090483b25cee110d679d278360a24f98e2ccc30ad7e9f5636e1af1",
            "objectType" : "file",
            "resolvedPath" : "",
            "suggestedAction" : {
               "archiveDir" : false,
               "chromeExtensionOther" : false,
               "chromeExtensionPreferences" : false,
               "chromeExtensionSecurePreferences" : false,
               "chromeExtensionSyncData" : false,
               "chromeUrlOther" : false,
               "chromeUrlSecurePreferences" : false,
               "chromeUrlSyncData" : false,
               "chromeUrlWebData" : false,
               "disableHubbleWhiteListing" : false,
               "disableSignatureWhiteListing" : false,
               "fileDelete" : true,
               "fileReplace" : false,
               "fileTxtReplace" : false,
               "folderDelete" : false,
               "isChromeObject" : false,
               "isDDS" : false,
               "isDoppleganging" : false,
               "isExternalDetection" : false,
               "isPUP" : false,
               "isShuriken" : false,
               "isWMIEventConsumer" : false,
               "killProcess" : false,
               "minimalWhiteListing" : false,
               "moduleUnload" : false,
               "noLinking" : false,
               "physicalSectorReplace" : false,
               "priorityHigh" : false,
               "priorityNormal" : false,
               "priorityUrgent" : false,
               "processUnload" : false,
               "regKeyDelete" : false,
               "regValueDelete" : false,
               "regValueReplace" : false,
               "shortcutReplace" : false,
               "silentMode" : false,
               "singleDelete" : false,
               "treatAsRootkit" : false,
               "useDDA" : false,
               "verifyResolvedPath" : false,
               "whitelistCheckError" : false
            }
         },
         "ruleID" : 392685,
         "ruleString" : "",
         "rulesVersion" : "0.0.0",
         "srcEngineComponent" : "unknown",
         "srcEngineThreatNames" : [

         ],
         "threatID" : 0,
         "threatName" : "Malware.Ransom.Agent.Generic"
      }
   ],
   "threatsDetected" : 1
}

I uninstalled Firefox before I read your reply, so I can't upload the installed program's .exe file.  Sorry.

Many thanks for your help.

 

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  • 3 weeks later...

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