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Thursday, April 11, 2019

Live Response Collection - Cedarpelta


Hello again readers and welcome back!! Today I would like to announce the public release of updates to the Live Response Collection (LRC), which is named "Cedarpelta". 




This may come as a surprise to some as Bambiraptor was released over two years ago, but over the past several months I've been working on adding more macOS support to the LRC. Part of the work that went into this version was a complete rewrite of all of the bash scripts that the LRC utilizes, which was no small task. Once the rewrite was completed, then I focused on my never-ending goal of blending speed, comprehensive data collection, and internal logic to ensure that if something odd was encountered, the script would not endlessly hang or, even worse, collect data that was corrupted or not accurate. So, lets delve into some of the changes that Cedarpelta offers compared to Bambiraptor!



Windows Live Response Collection
To be honest, not a whole lot has changed on the Windows side. I added a new module at the request of a user, that collects Cisco AMP databases from endpoints, if the environment utilizes the FireAMP endpoint detection product. The primary reason for this is that the databases themselves contain a WEALTH of information, however users of the AMP console are limited to what they can see from the endpoints. The reason for this is likely because it would take a large amount of bandwidth and processing power to process every single item collected by the tool. Since most of this occurs within AWS, the processing costs would scale considerably, which in the end would end up costing more money to license and use.* (*Please note that I am not a FireAMP developer, and I do not know if this is definitely the case or not, but from my outsider perspective and experience in working with the product, this explanation is the most plausible. If any developers would like to provide a more detailed explanation, I will update this post accordingly!)



MacOS Live Response Collection
This is the section that has had, by far, the most work done to it. On top of the code rewrite, which makes the scripting more "proper" and also much, much faster, new logic was added to deal with things like system integrity protection (SIP) and files/folders that used to be accessible by default, but now are locked down by the operating system itself. Support has been added for:


     - Unified Logs
     - SSH log files
     - Browser history files (Safari, Chrome, Tor, Brave, Opera)
     - LSQuarantine events
     - Even more console logs
     - And many, many other items!

One of the downsides to the changes to macOS is the fact that things like SIP and operating system lock downs prevent a typical user from accessing data from certain locations. One example of this is Safari, where by default you cannot copy your own data out of the Safari directory because of the OS protections in place. There are ways around this, by disabling SIP and granting the Terminal application full disk access under Settings, but since the LRC was written to work with a system that is running with default configurations, it will attempt to access these protected files and folders, and if it cannot, it will record what it tried to do and simply move on. Some updates that are in the pipeline for newer version of macOS may also require additional changes, but we will have to wait for those changes to occur first and then make the updates accordingly.

You will most likely no longer be able to perform a memory dump or automate the creation of a disk image on newer versions of macOS with the default settings, because of the updates and security protections native within the OS internals. As I have stated in the past, if you absolutely require these items I highly recommend a solution such as Macquisition from BlackBag. The purpose of the LRC is, and will always be, to collect data from a wide range of operating systems in an easy fashion, and require little, if any, user input. It does not matter if you are an experienced incident response professional, or directed to collect data from your own system by another individual, you simply run the tool, and it collects the data.



Future Live Response Collection development plans
As always, the goal of the Live Response Collection is not only to collect data for an investigation, it is also able to be customized by any user to collect information and/or data that is desired by that user. Please consider taking the time to develop modules that extract data and share modules that you have already developed. The next update of the LRC will focus on newer versions of Windows (Windows 10, Server 2019, etc). I personally am still encountering very few of those systems in the wild, but that is mostly because I tend to deal with larger enterprises where adoption of a new operating system takes considerable time, compared to a typical user that runs down to Best Buy and has a new Windows 10 laptop because the computer they used for a few years no longer works.


Remember, a tool is a tool. It is never the final solution
One last note that I would like to add is that please remember that while a lot of work has been put into the LRC to "just work", at the end of the day, it is just a tool that is meant to be used to enhance the data collection process. There are many open source tools that are available to collect data, perhaps more than ever before, and one tool may work where another one failed. 


For example, you might try the CrowdStrike Mac tool and it might work where the LRC fails, or vice versa. Or you may try to use Eric Zimmerman's kape on a Windows machine, but it fails because the .NET Framework was not installed. Or you might try to use the LRC on a system running Cylance Protect and it gets blocked because of the "process spawning process" rule. 

In each case you have to give various tools and methods a shot, with the end goal of collecting the information that you want. It is important to remember that YOU (the user of the tool) are the most valuable aspect of the data collection process, and you simply utilize tools to make the collection process faster and smoother!


LiveResponseCollection-Cedarpelta.zip - download here

MD5: fb53258f180407a836ae9bcd1e4d757d
SHA256: 6e37189598f3d67458ef98605dca916941a12d4c9c73db102c58782ad05fb3b
Updated: April 11, 2019

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