Alexis B.’s Post

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Special Agent - Digital Forensics Examiner - Opinions are mine only & subject to change

💭 #DFIR Thoughts It is a generalized misunderstanding that the column names and descriptions of a report generated by a digital forensics tool are the last word on what an artifact is or what it means. This erroneous assumption is so pervasive that it can be seen even within our organizations and labs. Using a tool that has been blessed as tested and verified does no mean that proper interpretation of the data and/or report is not needed anymore. It also does not absolve the expert from doing their own testing when an artifact is of key importance to a case. It definitely requires that managers stop outsourcing their responsibility to the validation team and really take into account the expertise of the examiners under their care. Even more importantly it should underscore how the best report is not the one that is more favorable to the theory of the case but the one that reflects the data accurately. Tool reports are not the data. The data is the data. Validate everything that matters. Tools can: 🔵 Parse data incompletely. 🔵 Parse data completely but present in a way that could be misinterpreted (which is what happens when new data has to fit in a predefined tool schema that does not provide for a way to indicate possible nuance.) 🔵 Wholly miss relevant data. 🔵 Present the data correctly in a way that is easy to understand even to non-experts. 🔵 Be erroneous. The tool has been wrong in the past and it will be again in the future. Does that mean tools are invalidated or useless? By all means, NO! Tool output is not the end of an examination but the start. Tool makers (I am one BTW) strive to make true sense of the data but at the end of the day "it is not the tool that does the exam but the examiner", the person behind the keyboard (thanks to DFIR Training (Brett Shavers) for the quote.) If you want to delve more into the topic check out SANS Digital Forensics and Incident Response paper titled Six Steps to Mobile Validation here: https://lnkd.in/ehQTkDs9 #DigitalForensics #MobileForensics #DataValidation #YouAreTheTool

Six Steps to Mobile Validation – Working Together for the Common Good

Six Steps to Mobile Validation – Working Together for the Common Good

sans.org

DFIR Training (Brett Shavers)

The most complete DFIR resource on the planet. Digital forensics software, hardware, training, white papers, and more.

1mo

Tools only show us the clues that may or may not be evidence. The one thing that a tool could add is to provide a dialog box that pops up when you press "Print Report." The dialog could say, "Bruh, did you validate these clues before printing this report??

Harlan Carvey

Staff Threat Intel Analyst, Adversary Tactics

1mo

So much to unpack here, and so true in so many ways! Moving more generically to "reports", this is also true for private sector DFIR consulting, and SOCs, as well. Very often, misinterpretation and miscommunication are the result of a failure to validate findings.

Jessica Hyde

Digital Forensic Examiner and Educator | Founder at Hexordia | Adjunct Professor at George Mason University | Speaker

1mo

Amen

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