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Timestomp is a utility co-authored by developers James C. Foster and Vincent Liu. The software's goal is to allow for the deletion or modification of time stamp-related information on files. Take for example the following screenshot of a command prompt window displaying the MACE values for a document file titled "text.txt". There are (4) four date time and date stamps displayed that are useful to Forensic Examiners in reconstructing when data was last modified, accessed, created, or entered into the NTFS Master File Table by the Operating system or manually by the user.
Using the Timestomp application, I have completely changed the modified date and time stamp (i.e., evidenced by the second screenshot). If I were to change it, along with the other entries to more believable dates and times, then the validity of the document falls into question as does its ability to completely slip by an examiner's watchful eye if looking for modified files in an entirely different year or date span.
Note: Although this program is designed to frustrate forensic analysis, it should be noted that its use can be easily detected. Because the program can delete all time stamp information, the lack of time stamp values would lead an examiner to the conclusion that something is amiss on the system. Microsoft-based Windows operating system record at least some timestamp information. The total absence of such is a dead giveaway that a user has tried to hide something. On the flipside, if the values are simply changed to believable values, then there is little chance of the change(s) being noticed at a casual glace.