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#SSH PROXIFIER DRIVER#
Kernel Callbacks - loading an EV-signed custom driver or exploiting a vulnerable one.ETW - patching in such a way that typical Assembly.Load functionality is less obvious.API Hooking - potentially remapping NTDLL, syscalls with dynamic ordinal resolution.Fork&Run - behavioral considerations regarding parent-child process relationships.NET 4.8+, Powershell, WSH (Windows Script Host)
#SSH PROXIFIER CODE#
Several potential host-based indicators that would typically be taken into consideration to maintain OPSEC when conducting dynamic code execution or dropping to disk will not be created when using this proxying technique, such as:
#SSH PROXIFIER WINDOWS#
The perks of proxying your Windows tools into a network also align with many of the same benefits associated with proxying any other tool into a network. The underlying win32 API calls these tools rely on, such as CreateProcessWithLogonW or CreateProcess could also be used for the same purpose. Two ways to accomplish this would be to either simply use the runas.exe binary, or by using the mimikatz PTH functionality in the instance of only having an NT hash for the target user. NET, the Win32 API, or even the native Windows API, to handle interaction with protocols such as WMI, MS-DRSR (DRSUAPI), MS-SCMR, and more, can save a headache on this front.Ĭombining this with the ability to create a process and associated token in the context of a user within the target domain from a remote, non-domain-joined Windows machine, results in the ability to leverage native Windows functionality to proxy even more existing tools into a compromised network. What makes this beneficial? Not having to reinvent the wheel by reimplementing a specific protocol, or using a reimplementation that may not fit your specific needs. The value I wanted to stress with this post is the ability to proxy RPC traffic (and more) from Windows tools into a target network. Proxying traffic from Windows for offensive purposes has also been addressed previously and this post will build on these resources by focusing on the protocols being proxied and address issues that may arise regarding configuration of SOCKS. The idea is not to replace the resources and tools that already exist, but to extend usability of tools (largely Windows-based) that otherwise would have required some kind of on-host execution.
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This post will instead cover proxying Windows tooling through a compromised host via SOCKS, such as several of the C# and Powershell projects we’ve come to know and love, along with some of the nuances that come along with leveraging this technique. Pushing traffic associated with tools such as Impacket, through utilities like Proxychains, is a well-documented topic. Proxying offensive tools into a network is not a new concept, from *nix-based or Windows operating systems. Skip to the Proxying Offensive Windows Tooling section for practical examples. TLDR Enable remote name resolution, as well as the proxying of Windows service / SYSTEM processes within Proxifier to resolve DNS issues and also coerce traffic from SYSTEM processes / Kernel-initiated TCP through your SOCKS proxy.
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Value proposition of executing Windows tooling remotely vs.To that end, this post aims to step through:
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However, there is significant value in the ability to proxy existing Windows tools and native utilities into a network from an offensive perspective. This nuance stems from protocol requirements of common network traffic being proxied into a target network, as well as the tools (or lack thereof) available for Windows to facilitate proxying network traffic via SOCKS. Leveraging SOCKS to proxy tools from a Windows attacker machine through a compromised host is a topic that contains some nuance and room for confusion.