Register For ADF’s Webinar: Solve Internet Crimes Against Children

In today’s digital age, child predators have ready access to our most innocent citizens. With Internet Crimes Against Children (ICAC) task forces deployed across the nation, U.S. law enforcement faces a daunting task of responding to internet crimes quickly.

ICAC investigators respond to CyberTips and desire to quickly determine if they need to confiscate devices, take a suspect into custody, and identify any and all victims. ADF works with Project VIC and CAID data to speed investigations starting from on-scene to back in the lab and ADF software allows for auto and manual tagging for quick, thorough court ready reporting which can be shared with other investigators and prosecutors even if they don’t have ADF software.

Join Rich Frawley, our Digital Forensic Specialist, as he leads you through ICAC investigation best practices in a 45 minute webinar and he’ll have time to answer your questions.

Register here

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Date: Thursday, June 7, 2018
Time: 2:00 PM EDT

Presenter: Rich Frawley, Digital Forensic Specialist, ADF Solutions

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File timestamps are used by forensics practitioners as a fundamental artifact. For example, the creation of user files can show traces of user activity, while system files, like configuration and log files, typically reveal when a program was run.

Despite timestamps being ubiquitous, the understanding of their exact meaning is mostly overlooked in favor of fully-automated, correlation-based approaches. Existing work for practitioners aims at understanding Windows and is not directly applicable to Unix-like systems.

In this paper, we review how each layer of the software stack (kernel, file system, libraries, application) influences MACB timestamps on Unix systems such as Linux, OpenBSD, FreeBSD and macOS.

We examine how POSIX specifies the timestamp behavior and propose a framework for automatically profiling OS kernels, user mode libraries and applications, including compliance checks against POSIX.

Our implementation covers four different operating systems, the GIO and Qt library, as well as several user mode applications and is released as open-source.

Based on 187 compliance tests and automated profiling covering common file operations, we found multiple unexpected and non-compliant behaviors, both on common operations and in edge cases.

Furthermore, we provide tables summarizing timestamp behavior aimed to be used by practitioners as a quick-reference.

Learn more: https://dfrws.org/presentation/a-systematic-approach-to-understanding-macb-timestamps-on-unixlike-systems/

YouTube Video UCQajlJPesqmyWJDN52AZI4Q_i0zd7HtluzY

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