Code42-Tips-from-the-Trenches-Searching-Files-in-the-Cloud

Tips From the Trenches: Searching Files in the Cloud

In a few of my previous blogs, I shared some examples of ways the Code42 security team uses Code42 Forensic File Search to find interesting files — macro-enabled Microsoft Office files, known malicious MD5 hashes and so on. Now that the search capabilities of our newest product have been extended beyond endpoints to include cloud services, such as Google Drive and Microsoft OneDrive, I’d like to look at how we’re using this broadened visibility in our investigations.

“ Because we can now use Code42 Forensic File Search to search for files and file activity across both endpoints and Google Drive, we can be more certain of the locations of sensitive files when we are doing file movement investigations. ”

Finding files – and tracking file movement – in the cloud

Code42 uses Google Drive as a cloud collaboration platform. Because we can now use Code42 Forensic File Search to search for files and file activity across both endpoints and Google Drive, we can be more certain of the locations of sensitive files when we are doing file movement investigations. We combine Code42 Forensic File Search with the Code42 File Exfiltration Detection solution to execute an advanced search — using a given MD5 hash — to find files that have been moved to a USB drive. This allows us to quickly build a complete picture of where a file exists in our environment — and how it may have moved from someone’s laptop to the cloud and back.

What files are shared externally?

Using the latest version of Code42 Forensic File Search, we can also search files based on their sharing status. For example, in a matter of a few seconds, we can search for all Google Drive documents that are shared with non-Code42 users. This shows us all documents that have been intentionally or inadvertently shared outside of the company. A deeper look at this list helps us identify any information that has been shared inappropriately. As with all searches within Code42 Forensic File Search, these investigations take only a few seconds to complete.

Here’s a hypothetical example: Let’s say the organization was pursuing an M&A opportunity and we wanted to make sure that confidential evaluation documents weren’t being shared improperly. We could use Code42 Forensic File Search to pull up a list of all documents shared externally. Should that list contain one of the confidential M&A evaluation documents, we could look more closely to determine if any inappropriate sharing occurred.

Continually finding new use cases

Code42’s ffs-tools repository on GitHub now includes several new searches that take advantage of our new cloud capabilities. You can find them all here.

Like most organizations, we use many cloud services to perform our day-to-day work. That’s why in the near future, we plan to expand the search capabilities of Code42 Forensic File Search across even more cloud services — giving you even greater visibility into the ideas and data your organization creates, no matter where they live and move.

Happy threat hunting!

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