Velociraptor Interactive Shell

One of the interesting new features in the latest release of Velociraptor is an interactive shell. One can interact with the end point over the standard Velociraptor communication mechanism - an encrypted and authenticated channel.

This feature is implemented by utilizing the Velociraptor event monitoring, server side VQL queries. This post explores how these components come together to deliver a responsive, interactive workflow.

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Server side VQL queries and Escalation Events

Previously we have seen how Velociraptor collects information from end points using Velociraptor artifacts. These artifacts encapsulate user created queries using the Velociraptor Query Language (VQL). The power of VQL is that it provides for a very flexible way of specifying exactly what should be collected from the client and how - without needing to modify client code or deploy new clients!

This is not the whole story though! It is also possible to run VQL queries on the server side! Similarly server side Velociraptor artifacts can be used to customize the operation of the server - without modifying any code or redeploying the server components.

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More on client event collection

Previously we have seen that Velociraptor can monitor client events using Event Artifacts. To recap, Event Artifacts are simply artifacts which contain event VQL queries. Velociraptor’s VQL queries do not have to terminate by themselves - instead VQL queries may run indefinitely, trickling results over time.

This post takes another look at event queries and demonstrates how these can be used to implement some interesting features.

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Velociraptor training at NZITF

We are very excited to run this full day training workshop at the New Zealand Internet Engineering Task Force (NZITF) conference.

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Event Queries and Endpoint Monitoring

In previous posts we have seen how Velociraptor can run artifacts to collect information from hosts. For example, we can collect WMI queries, user accounts and files.

However it would be super awesome to be able to do this collection in real time, as soon as an event of interest appears on the host, we would like to have that collected on the server. This post describes the new event monitoring framework and shows how Velociraptor can collect things such as event logs, process execution and more in real time.

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Detecting powershell persistence with Velociraptor and Yara

I was watching the SANS DFIR Summit 2018 videos on youtube and came across Mari DeGrazia’s talk titled “Finding and Decoding Malicious Powershell Scripts”. This is an excellent talk and it really contains a wealth of information. It seems that Powershell is really popular these days, allowing attacker to “live off the land” by installing fully functional reverse shells and backdoors, in a few lines of obfuscated scripts.

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Velorciraptor’s filesystem’s accessors

The latest release of Velociraptor introduces the ability to access raw NTFS volumes, allowing users to read files which are normally locked by the operating system such as registry hives, pagefile and other locked files. In addition, Velociraptor can now also read Volume Shadow Copy snapshots. The gives a kind of time-machine ability to allow the investigator to look through the drive content at a previous point in the past.

This blog post introduces the new features and describe how Velociraptor’s filesystem accessors work to provide data from multiple sources to VQL queries.

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Velociraptor walk through and demo

I just uploaded a screencast of the latest Velociraptor - check it out and play with it, and please provide feedback at velociraptor-discuss@googlegroups.com

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Velociraptor’s client communications

In the latest point release of the Velociraptor IR tool (0.2.3) we have improved upon GRR’s client communications protocol to deliver a fast and efficient, yet extremely responsive client communication. This post explains the design of the client communication and how it solves the problems with the old GRR’s client communication.

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Velociraptor Artifacts

We are super excited to introduce this point release of Velociraptor (0.2.2) which introduces the concept of Velociraptor Artifacts for the first time. This post is about what artifacts are, what they do and how can you use them.

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