In this inaugural instalment of the Malware Retrospective series, we take a trip down memory lane to revisit the Beast RAT, a notorious Windows RAT (Remote Access Trojan) developed by the elusive “Tataye.” This groundbreaking malware left an indelible mark on a whole generation of enthusiasts, including myself, who were captivated by its ingenuity and influence the whole scene back in it’s time.

A new version of the unprotect portal has been released with updates including:

• Migration from Bootstrap 4.x to the latest 5.x
• A complete rewrite of the style using SASS
• Multiple improvements, optimizations and refactoring
• Implementation of the first version of FeaturedAPI.

FeaturedAPI is a new feature that allows for the mapping of common Microsoft Windows API's used by specific evasion techniques, with the ability to consult the most commonly used API's for each technique and their associated caution level (Low, Medium, High) as well as access to official and unofficial documentation.

The team is also making progress on the sample scanner to match scanned samples to potential fitting techniques.

Happy New Year!

As we ring in the new year, we at PHROZEN would like to extend our warmest wishes to all of our clients, partners, and friends. We hope that the coming year brings you health, happiness, and prosperity.

As we look ahead to the year ahead, we are excited to announce that we will be focusing our efforts on the Unprotect project contribution, as well as working towards in passing new offensive-security certifications. While we have always been committed to delivering top-quality work to our clients, we believe that these efforts will allow us to better serve you and stay at the forefront of our industry.

We understand that this may mean that we will not be able to take on as many public projects as we have in the past, but we hope that you will understand and continue to support us as we work towards these important goals.

Thank you for your continued trust and support. Here's to a successful and fulfilling new year!

Sincerely,

We are thrilled that our new tool, DLest, was featured on the Qualys blog in the "New Tools & Techniques" section for December 2022. Keep an eye out for more exciting updates from us in the future!

DLest is a Microsoft Windows application that helps developers and malware analysts analyze and manipulate exported functions in Portable Executable (PE) files, especially DLLs. It allows you to enumerate exported functions using various methods and supports the analysis of memory-loaded modules in real time. It also has the ability to dump a reconstructed version of any module for further analysis. DLest is fully multithreaded and efficient for processing large numbers of PE files. It is useful for developers and malware analysts and streamlines their tasks.

Tiny code snippet that demonstrate how to open a new Windows Explorer window with pre-selected files.

Tiny Python code snippet to extract ASCII / Unicode strings from any file. This is a very simplified equivalent of UNIX strings command.

Supports:

• ASCII string extraction
• Unicode string extraction
• Show extracted string offset
• Define minimum extracted string length.

• Introduction of an option to keep certain information when process debug stops.
• Program title is now dynamic (display debugged process id and elevation status).
• Introduction of worker internal thread handling system.
• Possibility to enumerate loaded modules.
• Possibility to support child process inspection.
• Memory map now support child process inspection.
• Possibility to dump and partially reconstruct a portable executable image from memory (main and loaded modules).
• Several code improvements.

• Possibility to view debugged process memory map.
• Possibility to dump debugged process memory region(s).
• Exception handling system added (beta).
• Logging system added.
• UX Theme support.

We are excited to announce that our latest tool, PsyloDbg, has been featured in the "Tools & Exploits" section of Bad Sector Labs Blog's Last Week in Security. Stay tuned for more updates and improvements to come from us at PsyloDbg!

PsyloDbg is a versatile, user-friendly, and open-source debugger for the Windows platform. It is entirely written in Delphi, and its purpose is to assist malware analysts in their work by providing them with a fast and effective tool. As a result, analysts can save time and improve their response to malware threats.

New Unprotect C# Code Snippet added for technique Timestomp.

This tiny code snippet demonstrate the principle of file time stomping.

Steps:

• Enumerate files in current directory (excluding the target file).
• Sort enumerated files by modification date.
• Takes the most recent file and apply its File Creation Date, File Last Modification and File Last Access to our target file.

Additional information:

• Supports relative target file.
• If no files lives inside the current directory, then current directory (parent folder) date information are used.
• If no files lives inside the current directory and current directory is a root path, then timestomp procedure fails.

New Unprotect Delphi code snippet added for technique Process Hollowing, RunPE with support of both x86-32 and x86-64 in a single code.

New Unprotect Delphi Code Snippet added for technique Checking Mouse Activity

New Unprotect Delphi Code Snippet added for technique DLL Injection via CreateRemoteThread and LoadLibrary with both support of x86-32 and x86-64.

New Unprotect Delphi Code Snippet added for technique ProcEnvInjection - Remote code injection by abusing process environment strings for both x86-32 and x86-64.

New code snippet that demonstrate how Malware authors create self-deleting application. This technique rely on an external command line interpreter process that attempt to delete malware sample when sample process is terminated.

• Streaming performance considerably increased. FPS rate increased by 65% and can be optimised further by tweaking available options.
• Streaming desktop resolution is now controlled by the viewer.
• FastResize option was removed.
• Code optimisation.
• Windows key is now supported.
• Virtual Desktop window will show above terminal window.
• Beta support of LogonUI (Winlogon Protected Desktop).

The purpose of this tool is to allow users to run applications with system-level privileges in the context of their current active Windows session, using only the Microsoft Windows Task Scheduler.

Unlike other common tools, this technique does not require any external software or services, and can be easily configured to launch the system terminal and run the desired application within the current session. This allows users to access system-level functionality and interact with the application in real time.

• Invoke-RemoteDesktopServer error fixed during module import.

• Code improvement.
• Streaming performance increased.
• X509 Certificate password supported.

• Option to prevent server computer to enter sleep mode.
• Streaming performance increased by using dirty region detection (motion update). Only the part of Remote Desktop that changed are sent to viewer.
• Mouse control improved.
• Keyboard control improved.
• Code improvement.

PowerRunAsAttached is a ported version of RunAsAttached in pure PowerShell.

PowerBruteLogon is a ported version of WinBruteLogon in pure PowerShell.

• Application protocol redesigned to be more fast, stable and modular.
• Session concurrency now supported. Multiple viewers can connect to the same server at the same time.
• Possibility to shutdown server using CTRL+C
• Streaming quality is now controlled by the viewer.
• Desktop image size is now requested server-side.
• Bug fix in virtual desktop alignement.
• Timeout implement during protocol negotiations to avoid possible dead locks.
• Virtual desktop can now be set on top of other windows.
• Server supports SecureString for authentication password.

• Deprecated TransportMode option removed.
• Streaming performance improved.
• Code improvement, release stability is good enough to mark release as stable.

• Code improvement.
• Ingress / Egress event support.
• Bug fix for password generation algorithm.
• Bug fix for virtual keyboard.
• Clipboard synchronisation implemented.
• View only option added. If used remote viewer cannot control remote server.

• Viewer now support SecureString to handle password.
• Certificate fingerprint validation implemented server-side.
• Trust a remote server temporarily or definitively (can be revoked)
• Server-trust management system.

• Possibility to control desktop streaming image quality.
• Support multiple monitors. You can choose which monitor to stream.

• HDPI is completely supported for both viewer and server.

• Desktop streaming is now sent in raw rather than base64 encoded thus increasing streaming performance. Base64 streaming encoding is still available as an option but marked as deprecated.
• Application protocol revisited.
• TLS v1.3 now optionally supported.
• Code improvements.
• Password complexity is enforced to avoid hosting a dangerous Remote Desktop server.
• Console verbosity can be disabled.
• Versions synchronisation implemented. Viewer version must fit with remote server and vis versa.

Power Remote Desktop is a powerful and easy-to-use remote desktop application that is written entirely in PowerShell. Unlike other remote desktop solutions, it does not rely on any external software or protocols to function, making it quick and easy to install and use. Its primary advantage is its use of PowerShell, which allows for seamless integration with other scripts and tools, as well as its user-friendly interface. Power Remote Desktop is a versatile and reliable solution for anyone needing to access and control remote computers.

The tool is a PowerShell module that allows you to load and execute .NET assemblies from memory, transferred over a network connection such as HTTP. It consists in retrieving the .NET assembly located at an URL. It then loads the assembly into memory and executes with given parameters.

This tool is useful for anyone who needs to load and execute .NET assemblies over a network connection, such as during a penetration testing engagement or when working with remote systems. It allows you to easily load and execute assemblies from memory, without the need to save them to disk first.

This PoC project demonstrate the dangerousness of InnoSetup installers. Installers should never be trusted, not only it can contain Malwares, it is also possible to entirely code a complete and functional Malware using their embedded scripting engines.

In this PoC, we explorer the InnoSetup scripting engine (derived from Pascal) to execute a shellcode generated with msfvenom