Nevertheless, an investigator will look into various locations on the suspect system to locate the deleted browser history files.These are binary files that contain information regarding the URLs and filenames associated with cached data, as well as time stamp data.Table 7.2. Firefox Cache Locations Operating System Location Windows XP C:Documents and SettingsusernameLocal SettingsApplication DataMozillaFirefoxProfiles Windows Vista7 C:UsersusernameAppDataRoamingMozillaFirefoxProfiles Linux homeusername.mozillafirefoxProfiles OS X UsersusernameLibraryCachesFirefoxProfiles Although there are free forensic applications for parsing these data, none of these tools are open source.
Ftk Imager Full Chapter URLView chapter Purchase book Read full chapter URL: UNIX Forensic Analysis Cory Altheide, Eoghan Casey, in Handbook of Digital Forensics and Investigation, 2010 Cache In addition to browser history files, a users browser cache may be of investigative importance. Opening this directory for viewing will usually yield a stream of numbered unidentifiable files along with one cache map file (CACHEMAP) and three cache block files (CACHE00x). These are binary files that contain information regarding the URLs and filenames associated with the cached data, as well as timestamp data. A common feature in todays browser is the practice of storing the browsing history of the user so that they may quickly and easily access previously visited web sites and other locations. While such a feature is definitely convenient it can be used against a client to obtain information that the user would prefer to otherwise keep private. An attacker wishing to obtain browser history information from a client has two options to do so either via JavaScript or via Cascading Style Sheets (CSS). In the following section we will focus on these most likely methods. Did You Know The amount of information kept in a browsers cache varies depending on the browser used. For example, Internet Explorer stores a wealth of information in its browser history making it an attractive target for an attacker. By default IE stores information in its browser history for up to 30 days before it is purged from the history on the system. Other browsers such as Firefox, Opera, Safari, and Chrome all have their own defaults and ways of storing information for later use. In the following examples, we will rely on the fact that different colors and styles can be applied to hyperlinks by the browser. In our examples we will specifically single out the fact that links that have been previously visited can have their own color and style assigned to them to make them stand out from other links. View chapter Purchase book Read full chapter URL: Cyber Forensics and Incidence Response Cem Gurkok, in Computer and Information Security Handbook (Third Edition), 2017 Reconstructing Cleared Browser History It is possible to come across cleared browser histories during an investigation. The user could have deliberately deleted the files to hide their web browsing activity or a malware could have removed its traces to avoid detection and analysis. The possible locations are unallocated clusters; cluster slack, page files, system files, hibernation files, and system restore points. Using AccessDatas FTK Imager on the suspect drive or drive image, an investigator could promptly locate the orphaned files and see if the browser files are present there. The next step would be to use the FTK Imager to look at the unallocated spaces, which should end up being a time-consuming analysis as seen in Fig. If the drive has not been used too much, an investigator has a high chance of locating the files in the unallocated space. Figure 41.7. Use of AccessData FTK Imager. View chapter Purchase book Read full chapter URL: Cyber Forensics and Incident Response Cem Gurkok, in Managing Information Security (Second Edition), 2014 Reconstructing Cleared Browser History It is possible to come across cleared browser histories during an investigation.
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