AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |
Back to Blog
Osquery windows examples11/16/2023 FoobarColumns returns the columns that our table will return.įunc FoobarColumns() table. Server.RegisterPlugin(table.NewPlugin("foobar", FoobarColumns(), FoobarGenerate)) a slice of Columns and a Generate function. table.NewPlugin requires the table plugin name, Create and register a new table plugin with the server. Log.Fatalf("Error creating extension: %s\n", err) Server, err := osquery.NewExtensionManagerServer("foobar", *socket) ![]() Log.Fatalf(`Usage: %s -socket SOCKET_PATH`, os.Args) Socket := flag.String("socket", "", "Path to osquery socket file") Consider the following Go program: package main If you want to create a custom osquery table in Go, you'll need to write an extension which registers the implementation of your table. Using the library Creating a new osquery table This library is compatible with Go Modules. For more information about how this process works at a lower level, see the osquery wiki. You can then have osquery load the extension in your desired context (ie: in a long running instance of osqueryd or during an interactive query session with osqueryi). To create an extension, you must create an executable binary which instantiates an ExtensionManagerServer and registers the plugins that you would like to be added to osquery. This project contains Go bindings for creating osquery extensions in Go. are implemented via a robust plugin and extensions API. In osquery, SQL tables, configuration retrieval, log handling, etc. If you're interested in learning more about osquery, visit the GitHub project, the website, and the users guide. With osquery, SQL tables represent abstract concepts such as running processes, loaded kernel modules, open network connections, browser plugins, hardware events or file hashes. This allows you to write SQL-based queries to explore operating system data. Osquery exposes an operating system as a high-performance relational database. NewExtensionManagerServer(name, sockPath, opts) (c) RegisterExtensionContext(ctx, info, registry) (c) DeregisterExtensionContext(ctx, uuid) If a process starts and terminates in between two queries, we will not find it in the “processes” table results.(c) CallContext(ctx, registry, item, request) Returned data gives information about the state at the moment of processing the query. Examples: -show users accounts SELECT FROM users WHERE uid > 500 -show all firewall exceptions SELECT FROM alfexceptions -applications that have never been opened SELECT name, bundleversion, path ,lastopenedtime FROM apps WHERE path LIKE '/Applications' AND lastopenedtime < 1 -show third party kernal exstentions SELECT. It is important to realize capabilities and limitations of Osquery when dealing with relatively short-duration effect. For each process, it is worth to check the account it is running under and what is its parent process. Processes running from AppData warrant a closer look, although these can be legitimate. ![]() A classic example is execution of system executables running from a folder other than System32 or SysWOW64. Then, look for names of processes running from unusual locations. First clues to look for in the output are unusual arguments of command interpreter programs, such as cmd, powershell, python, cscript. It also demonstrates typical Osquery usage in combining data from multiple tables. The query listed below represents a general starting point that can be adjusted according to the type of suspicious activity we are currently hunting for. From basic information like executable path, command line arguments and PID to details such as usage of CPU time, memory usage and disk IO amount. One of the most frequently used Osquery tables, “processes” offers a lot of information about currently running processes. You can read more about Osquery in our short blog post. ![]() Queries from this blog need to be run with administrator privileges, otherwise their results can be incomplete. We will show Osquery queries helpful in identifying processes with suspicious network activity, which can serve the attackers for easy backdoor access to the device. For this purpose, attackers often launch malicious processes, hunting for which is the topic of this part of our blog series. After gaining initial access to a device, the attackers try to establish command and control (C&C, C2) over the device with the aim to use it in following stages of the attack.
0 Comments
Read More
Leave a Reply. |