Malaysian Forensics Expert recovers data from waterlogged Blackberry

A mobile phone, believed to have been owned by one of four murder victims, including cosmetics millionairess Datuk Sosilawati Lawiya, had received a call from one ‘Datuk Pathma 2’, several hours before they were allegedly killed, the High Court here was told today. Federal police computer crime analyst ASP Mohd Zulkifly Mohd Isa said the white Blackberry 9700’s transaction record showed it had received a call from 016-2047518 and saved as ‘Datuk Pathma 2’ at 6pm on Aug 30, last year…

More (Bernama.com)

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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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