Estimated Impact EventsĮstimated impact events are generated to log the estimated performance impact information of running software as part of Windows Defender. Note: Log formatting for each event has changed over time, so depending on when the event was written, you may have more or fewer fields than explained below. There are several different event types present in this log file. Example MPLog location Interpreting MPLog Data The screenshot in Figure 1 provides an example of sample content.įigure 1. In this directory you will find the file MPLog-*. MPLog files are stored under the directory C:\ProgramData\Microsoft\Windows Defender\Support. This log can contain historical evidence of the following: The Microsoft Protection Log, or MPLog, is a plain-text log file generated by Windows Defender or Microsoft Security Essentials for troubleshooting purposes. To aid investigators everywhere, this blog post provides an overview of the MPLog files, offers examples of the data contained within and walks through a case study of RClone, a data exfiltration tool used by eCrime actors during ransomware attacks.
MPLog has proven to be beneficial in identifying process execution and file access on systems. As part of that fact-finding mission, analysts investigating Windows systems leverage the Microsoft Protection Log (MPLog), a forensic artifact on Windows operating systems that offers a wealth of data to support forensic investigations.
In an incident response investigation, CrowdStrike analysts use multiple data points to parse the facts of who, what, when and how.
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