Cloud forensic investigation

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Ainhana

New Member
Dec 3, 2018
3
1
#1
Hi everyone.

I need your opinion regarding with what are the most challenges of cloud forensic? Can anyone share any experience or opinion regarding with cloud forensic. Because currently I am doing my research regarding with challenges of cloud forensic investigation. Please help. Thank you.
 

JLowery

New Member
Oct 22, 2018
4
Ratings
8
3
Greater Chicago Area
#2
It really depends on what you are trying to do with the data, the cloud storage provider, how the accounts are configured (personal, work, shared, etc), and other factors. Also, are you trying to do forensics on files found locally on a custodian’s computer (found in a cloud storage's sync folder) or are you going for files that are currently in the cloud and you need to preserve them?

One issue you may encounter is when trying to download files stored in the cloud is instances where files may be shared with the custodian (read only access or edit) but not owned by them. Depending on the service, it may or may not allow you to download these files.

Another thing to consider is that the metadata may be stripped and the timestamps updated to the time that the file was uploaded to the cloud service. It may be possible to download a “changelog” or see a list of what changes were made to the file for each edit but this isn’t always available.

You will also want to check what devices the custodian synced with the accounts as there may be offline (older) copies of the files located on other devices which could be beneficial to your investigation.

Methods of accessing the files is also something to consider. Will you have to use a sync client for the provider to download your own copy of the files? If so, you need to make sure that your workstation is clean so you don’t cross contaminate data. Can you download the files directly from the browser? You will want to do a comparison between the downloaded files and what is seen in the browser to ensure that you have everything as some files may not be able to be downloaded with the custodian’s access. Depending on the storage service, you may be able to use some forensics tools like F-Response but you will also want to ensure that you are getting everything that is seen in the browser.

There are other things to consider but this will at least give you a place to start.

Let me know if you have any other questions.
 

tinna01

New Member
Dec 7, 2018
1
Ratings
1
1
#3
Another thing to consider is that the metadata may be stripped and the timestamps updated to the time that the file was uploaded to the cloud service.
 

Lids

New Member
Experienced Member
Oct 23, 2018
22
Ratings
19
3
#4
Great point @tinna01, date/timestamps need to have particular attention paid to them -- and not all collection tools operate the same in this regard
 

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