You are a digital forensics investigator retained by a financial institution in London. An internal audit flagged a Senior Financial Analyst, subject J.D., for suspicious data access outside of normal business hours.
Management suspects J.D. of exfiltrating sensitive client portfolios to a personal cloud storage account. The subject's workstation (Windows 10 Enterprise) was secured. A preliminary review of the local History SQLite database for Google Chrome shows no records of navigation to any cloud storage sites during the timeframe in question. However, network logs suggest otherwise.
The subject claims they never visited those sites and that the lack of browser history proves it. The incident response team suspects the use of Chrome's "Incognito" mode.
The first responder correctly performed a live acquisition before powering down the machine.
In a digital-forensics investigation involving a suspected insider threat at a financial institution in London, an analyst is examining the suspect's web browsing history. The analyst notices that the suspect used an "incognito" or "private" browsing mode. Which of the following statements is true regarding the recovery of browsing history in this situation?
The evidence clearly indicates a discrepancy between the non-volatile application data and the volatile OS data. While the standard Chrome History SQLite file (Item 03) is clean, the DNS cache (Item 02) proves the operating system resolved the IP address for a cloud storage provider. Furthermore, a 16GB RAM dump (Item 01) was preserved, which likely contains the active or recently closed Incognito session data.
Examination & Analysis: The investigator is interpreting acquired artifacts to establish a timeline of events and reconstruct user activity despite anti-forensic attempts (using Incognito mode).
When a user utilizes Incognito or Private browsing mode, the browser application is programmed not to write browsing history, cookies, or site data to the local disk (specifically the user's AppData profile). However, the Operating System must still perform DNS lookups to route traffic, which leaves traces in the DNS cache. Additionally, the web pages rendered, URLs typed, and session tokens must reside in the system's Random Access Memory (RAM) while the browser is open. Volatility analysis tools (like Volatility Framework) can be used to carve URLs, loaded DLLs, and network connections directly from the MEMORY_DUMP_JD_WS.raw file.
In a real investigation, if private browsing is suspected or disk encryption is active, the absolute first step in the Collection phase is Live Response: acquiring volatile memory (RAM) before pulling the plug. Relying solely on dead-box (disk) forensics in this scenario would result in a lack of evidence.
RFC 3227 dictates the Order of Volatility. Investigators must collect evidence from the most volatile to the least volatile to ensure data isn't lost during the collection process. The order is generally:
By capturing RAM first, the first responder preserved the only location where the Incognito session data might reside.