Initial commit

.gitignore

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+bin/
+obj/
+*.user
+*.suo
+.vs
+x64/
+Release/
+Debug/
+build/

LICENSE

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README.md

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+# RandomX Sniffer
+RandomX Sniffer is a proof of concept tool that can detect RandomX cryptojacking malware on Windows. RandomX Sniffer will detect any process running RandomX regardless of how it's coded or obfuscated. This is possible because the RandomX algorithm leaves a trace in the CPU registers that can be detected.
+
+There are only 2 ways how malware can hide from being detected by this technique:
+
+1. by emulating floating point operations using integer math and losing >95% of performance in the process
+1. by modifying the operating system
+
+## Build
+
+Build using Visual Studio 2019.
+
+## License
+
+The source code is released into the public domain under CC0.
+
+## Donations
+
+Author's XMR address:
+```
+845xHUh5GvfHwc2R8DVJCE7BT2sd4YEcmjG8GNSdmeNsP5DTEjXd1CNgxTcjHjiFuthRHAoVEJjM7GyKzQKLJtbd56xbh7V
+```

randomx-sniffer.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.29324.140
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "randomx-sniffer", "src\randomx-sniffer.vcxproj", "{97930B5A-1D5C-4A2A-BBBB-F70529C7C435}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|x64 = Debug|x64
+		Debug|x86 = Debug|x86
+		Release|x64 = Release|x64
+		Release|x86 = Release|x86
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{97930B5A-1D5C-4A2A-BBBB-F70529C7C435}.Debug|x64.ActiveCfg = Debug|x64
+		{97930B5A-1D5C-4A2A-BBBB-F70529C7C435}.Debug|x64.Build.0 = Debug|x64
+		{97930B5A-1D5C-4A2A-BBBB-F70529C7C435}.Debug|x86.ActiveCfg = Debug|Win32
+		{97930B5A-1D5C-4A2A-BBBB-F70529C7C435}.Debug|x86.Build.0 = Debug|Win32
+		{97930B5A-1D5C-4A2A-BBBB-F70529C7C435}.Release|x64.ActiveCfg = Release|x64
+		{97930B5A-1D5C-4A2A-BBBB-F70529C7C435}.Release|x64.Build.0 = Release|x64
+		{97930B5A-1D5C-4A2A-BBBB-F70529C7C435}.Release|x86.ActiveCfg = Release|Win32
+		{97930B5A-1D5C-4A2A-BBBB-F70529C7C435}.Release|x86.Build.0 = Release|Win32
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {8F07CD74-4BE5-48A0-8153-1C9A5F5C5CB2}
+	EndGlobalSection
+EndGlobal

src/main.cpp

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+/*
+
+	RandomX Sniffer by tevador <[email protected]>
+
+	To the extent possible under law, the person who associated CC0 with
+	RandomX Sniffer has waived all copyright and related or neighboring rights
+	to RandomX Sniffer.
+
+	You should have received a copy of the CC0 legalcode along with this
+	work.  If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+
+*/
+
+#include <iostream>
+#include <chrono>
+#include <thread>
+#include <string>
+#include <vector>
+#include <algorithm>
+#include "process_list.h"
+
+struct SuspectProcess {
+	SuspectProcess(randomx::Process p) : id(p.getId()),	name(p.getName()) {
+	}
+	std::wstring name;
+	DWORD id;
+	std::vector<DWORD> threads;
+};
+
+using namespace std::chrono_literals;
+
+int main() {
+	randomx::ProcessList pl;
+	std::vector<SuspectProcess> suspectProcesses;
+
+	try {
+		for (int i = 0; i < 5; ++i) {
+			std::this_thread::sleep_for(50ms);
+			pl.query();
+			do {
+				auto process = pl.currentProcess();
+				for (unsigned i = 0; i < process.getThreadCount(); ++i) {
+					auto thread = process.getThread(i);
+					if (thread.canAccess()) {
+						//consider all threads with non-default rounding mode as suspicious
+						//there may be better heuristics
+						if (thread.getRound() != randomx::Round::Default) {
+							auto threadId = thread.getId();
+							auto pid = process.getId();
+							auto it = std::find_if(
+								suspectProcesses.begin(), suspectProcesses.end(),
+								[&pid](const SuspectProcess& x) { return x.id == pid; });
+							if (it != suspectProcesses.end()) {
+								auto& sp = *it;
+								auto itt = std::find(sp.threads.begin(), sp.threads.end(), threadId);
+								if (itt == sp.threads.end()) {
+									sp.threads.push_back(threadId);
+								}
+							}
+							else {
+								SuspectProcess sp(process);
+								sp.threads.push_back(threadId);
+								suspectProcesses.push_back(sp);
+							}
+						}
+					}
+				}
+			} while (pl.moveNext());
+		}
+
+		if (suspectProcesses.empty()) {
+			std::cout << "No suspicious processes were found" << std::endl;
+		}
+		else {
+			for (const auto& sp : suspectProcesses) {
+				std::wcout << "Process " << sp.name;
+				std::cout << " (PID " << sp.id << ") may be mining RandomX on ";
+				std::cout << sp.threads.size() << " thread(s)";
+				std::cout << std::endl;
+			}
+		}
+	}
+	catch (const std::exception & ex) {
+		std::cout << "ERROR: " << ex.what() << std::endl;
+		return 1;
+	}
+	return 0;
+}

src/process.cpp

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+/*
+
+	RandomX Sniffer by tevador <[email protected]>
+
+	To the extent possible under law, the person who associated CC0 with
+	RandomX Sniffer has waived all copyright and related or neighboring rights
+	to RandomX Sniffer.
+
+	You should have received a copy of the CC0 legalcode along with this
+	work.  If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+
+*/
+
+#include "process.h"
+#include <winternl.h>
+
+namespace randomx {
+
+	DWORD Process::getId() const {
+		auto spi = reinterpret_cast<PSYSTEM_PROCESS_INFORMATION>(data_);
+		return (DWORD)spi->UniqueProcessId;
+	}
+
+	PWSTR Process::getName() const {
+		auto spi = reinterpret_cast<PSYSTEM_PROCESS_INFORMATION>(data_);
+		if (spi->ImageName.Length > 0) {
+			return spi->ImageName.Buffer;
+		}
+		return nullptr;
+	}
+
+	ULONG Process::getThreadCount() const {
+		auto spi = reinterpret_cast<PSYSTEM_PROCESS_INFORMATION>(data_);
+		return spi->NumberOfThreads;
+	}
+
+	Thread Process::getThread(ULONG index) const {
+		auto data = reinterpret_cast<LPBYTE>(data_);
+		auto threads = reinterpret_cast<PSYSTEM_THREAD_INFORMATION>(data + sizeof(SYSTEM_PROCESS_INFORMATION));
+		return Thread((DWORD)threads[index].ClientId.UniqueThread);
+	}
+}

src/process.h

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+/*
+
+	RandomX Sniffer by tevador <[email protected]>
+
+	To the extent possible under law, the person who associated CC0 with
+	RandomX Sniffer has waived all copyright and related or neighboring rights
+	to RandomX Sniffer.
+
+	You should have received a copy of the CC0 legalcode along with this
+	work.  If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+
+*/
+
+#pragma once
+#include <Windows.h>
+#include "thread.h"
+
+namespace randomx {
+
+	class Process {
+	public:
+		Process(void* data) : data_(data) {
+		}
+		DWORD getId() const;
+		PWSTR getName() const;
+		ULONG getThreadCount() const;
+		Thread getThread(ULONG) const;
+	private:
+		void* data_;
+	};
+
+}