NimHollow

Nim implementation of Process Hollowing using encrypted shellcodes and direct syscalls (NimlineWhispers by @ajpc500 is rocking 🔥). Some slides for better understanding of the technique are inside!

https://github.com/snovvcrash/NimHollow

#nim #edr #bypass #syscall

For someone, who didn't notice this link in our posts

https://j00ru.vexillium.org/syscalls/nt/64/

#maldev #call #table #syscall

Malware Analysis: Syscalls

Great guide and overview about Syscalls and how to start diagnosing them.

https://jmpesp.me/malware-analysis-syscalls-example/

#maldev #cpp #syscall

SysWhispers is dead, long live SysWhispers!

In a journey around the fantastic tool SysWhispers, cover some of the strategies that can be adopted to detect it, both statically and dynamically.

https://klezvirus.github.io/RedTeaming/AV_Evasion/NoSysWhisper/

#edr #evasion #syscall #redteam #blueteam

🔔 TamperingSyscalls

This is a 2 part novel project consisting of argument spoofing and syscall retrival which both abuse EH in order to subvert EDRs. This project consists of both of these projects in order to provide an alternative solution to direct syscalls.

Research:
🔗 https://fool.ish.wtf/2022/08/feeding-edrs-false-telemetry.html

Source:
🔗 https://github.com/rad9800/TamperingSyscalls

#edr #evasion #maldev #syscall #tampering

🛠 DynamicSyscalls

This is a library written in .net resolves the syscalls dynamically (Has nothing to do with hooking/unhooking).

https://github.com/Shrfnt77/DynamicSyscalls

#maldev #csharp #syscall #library

🔀 Direct Syscalls vs Indirect Syscalls

This post discusses Indirect Syscalls as a solution to eliminate indicators of compromise and avoid detection by EDRs. Indirect Syscalls allow the execution of Syscall and Return statements in the memory of ntdll.dll, which is the usual behavior in Windows.

https://redops.at/en/blog/direct-syscalls-vs-indirect-syscalls

#maldev #syscall #edr #bypass

🐧 Linux Kernel Syscalls

Very useful website if you need a quick reference to Linux kernel syscalls (numbers and parameters for various architectures and kernel versions)

🌐 Details:
https://syscalls.mebeim.net/

#linux #kernel #syscall

😈 POSTDump

This is the C# / .NET implementation of the ReactOS minidump function (like nanodump), thus avoiding call to the Windows API MiniDumpWriteDump function.

🚀 Key Features:

— Usage of indirect syscall along with halo's gate technic to retrieve syscalls IDs
— No memory Allocation/Protection call is performed for indirect syscall, instead, free RWX codecave found in the current process are used
— ETW patching
— No call to MiniDumpWriteDump

🌐 Source:
https://github.com/YOLOP0wn/POSTDump

#windows #lsass #dump #syscall #reactos