Chaos-Rootkit

Chaos-Rootkit

• Chaos-Rootkit is an x64 Ring 0 rootkit i wrote to better understand kernel internals and rootkit techniques.

• Gui version

Features

• Hide process: This feature allows you to hide processes from listing tools via DKOM.

• Elevate specific process privileges : This feature enables you to elevate specific processes privilege .

• Swap the driver on disk and in memory with a Microsoft driver: All credit for this implementation goes to IDontCode Back Engineering for his exceptional work, I’ve also handled the unload and shutdown routines for this feature so that the rootkits driver doesn’t get corrupted or crash at some point.

• Restrict file access for user-mode applications except for the provided process ID

• Spawn elevated process: launch command prompt with elevated privileges .

• Bypass the file integrity check and protect it against anti-malware : this work by redirecting file operations to a legitimate file, making our file appear authentic and signed with a valid certificate also if an anti-malware attempting to scan it, the rootkit will immediately kill the anti-malware process.

• Unprotect all processes

• Protect a specific process with any given protection level (WinSystem, WinTcb, Windows, Authenticode, Lsa, Antimalware) .

• Protect a specific file against anti-malware, when an anti malware tries to scan it the rootkit will shut it down this done by checking the caller EPROCESS protection member .

Contribution

• Contributions are welcome, but when contributing, please pay attention to the implementation details of how the rootkit is designed. For example, see this code. Ignoring this logic will break the driver. The last contribution did not follow this design, and I had to push several updates to fix it :(

Writeup

• https://www.hackandhide.com/chaos-rootkit-internals-explained/

CREDITS

• Yassine Jerroudi : Helped significantly with the early version of the rootkit client GUI, since I was a complete noob with IMGUI. Deserves all the credit.
• IDontCode BackEngineerLab: All credit for the implementation of swapping the driver on disk and in memory.
• sixtyvividtails : Thanks to him for recommending probing ObjectAttributes->ObjectName->Buffer at all three levels, since we are hooking NtCreateFile and receive user-controlled pointers.
• Pavel Yosifovich : the author of Windows Kernel Programming, this book remains the single most valuable resource I rely on, without a solid understanding of kernel internals, you can’t just vibe-code drivers. real knowledge is the only thing that keeps you from getting completely cooked …
• To contributors: Special thanks to UncleJ4ck, the first contributor, for implementing error handling, and to staarblitz for adding Windows 11 24H2 offsets and GUI protection.