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Who accessed my files

Posted on 2010-11-26
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Last Modified: 2012-05-10
I have an employee that has a shared folder on his Wndows Xp machine running in a Domain at work. He has shared the folders so that he can access them over the network when he uses a VPN connection to work from home. But now he finds out that some of his files has been accessed during the night and it has not been him. It says "Date accessed: 01:25".

Is there a way to find out which person/computer has accessed the files through some sort of log? Can there be anything else that has changed the access date for the files during the night, so that this is normal? Btw there is no antivirus og backup that has been scheduled to run at this particular insidence.

 
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Question by:mintraas
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delyan_valchev earned 500 total points
ID: 34216618
Hello,
You may want to turn on the access auditing on the particular shares or particular files. This way you will have the events logged to the Security event log.
Keep in mind that you need to enable the Audit object access setting in the local security policies (if not already defined through GPO). The setting is located in:
 Security Settings->Local Policies->Audit Policy->Audit object access
After that you can enable the auditing by setting the advanced security->auditing on the folders or individual files. If you are really paranoid, enable both success and failure auditing for Everyone on everything. This will have a hit on the performance and also quite some events will be overflowing the security log.

Hope it helps!
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by:mintraas
ID: 34216792
Ok, so there is no way to see what has already happend to these files when this function is not turned on at the moment?
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ID: 34216984
Bear in mind that AV scanning may affect the date accessed time.

Check to see if any scheduled scans are due to run at that time.
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U.S. Department of Agriculture and Acronis Access

With the new era of mobile computing, smartphones and tablets, wireless communications and cloud services, the USDA sought to take advantage of a mobilized workforce and the blurring lines between personal and corporate computing resources.

 
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ID: 34216991
Note to self, please read all the way down the question next time!
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by:delyan_valchev
ID: 34217037
Unfortunately if you have no auditing enabled, you cannot see who or what exactly accessed the particular file. You can however check in the security log the time frame around 01:25 for any authentications from remote computers and/or users. This way you can only suspect someone.
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Expert Comment

by:delyan_valchev
ID: 34217057
By the way another culprit may be a some indexing service like Windows Desktop Search or Google Desktop which indexes the supported files in the background. If there is such software installed it's likely to be the cause.
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Author Closing Comment

by:mintraas
ID: 34217221
Thx. I configured, tested and it works.
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