IT Forensics – Windows

Forensic analysis of the Windows hibernation file (hiberfil.sys)

The hiberfil.sys file is used by Windows to save the contents of the RAM when the system enters hibernation mode. From a forensic perspective, it may contain valuable information about running processes, open applications, network connections and other memory contents. The data actually present depends on the system’s current state and how the computer is being used.

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As part of a professional IT forensic investigation, the hiberfil.sys file is never analysed in isolation. Only by correlating it with other artefacts – such as RAM images, the pagefile.sys, the Windows Registry, event logs, prefetch files and the Master File Table (MFT) – is it possible to carry out a robust technical assessment.

Why LanCologne?

Since its foundation, LanCologne has specialised in professional IT forensics. Our staff have decades of experience in the field of information technology and assist companies, solicitors, private individuals and, on a regular basis, the courts in the technical investigation of complex digital matters.

The examination is carried out exclusively on a forensic copy or a forensic image. The original evidence remains unchanged and is stored in a manner that preserves its evidential integrity.

Our services

We analyse the idle-state file, extract relevant memory information and cross-check the results against other digital evidence. All stages of the investigation are documented in a transparent manner and assessed from a technical perspective.

Typical areas of application

•Reconstruction of ongoing processes
•Investigation of malware
•Incident Response
•Analysis of open applications
•Data theft
•Expert reports for the courts

This is how the analysis of hiberfil.sys works

Once a forensic image has been created, the hibernation file is analysed. The information obtained is then correlated with other Windows artefacts and placed within the overall context of the investigation.

Why is hiberfil.sys important?

The hibernation file may contain memory information that would otherwise no longer be available when the system is switched off. However, its significance only becomes apparent following a comprehensive analysis of all relevant digital traces.

Frequently Asked Questions

What is hiberfil.sys?+
The Windows file used to save the contents of RAM when the system is put into hibernation.
Is the original system being examined?+
No. Only a forensic copy or forensic image is analysed.
Does the hiberfil.sys file always contain usable information?+
No. The contents depend on the system state and on whether hibernation has been used.
Is the hiberfil.sys file on its own sufficient for an expert report?+
No. It is always analysed alongside other Windows artefacts.

LanCologne – Windows Forensics in Cologne

Do you need a professional analysis of hiberfil.sys or other Windows artefacts? LanCologne can assist you with the forensic-grade preservation of digital evidence and the objective analysis of complex Windows systems.

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