build: bump version to 1.6.0 (#60)

.github/workflows/build.yml

@@ -13,7 +13,7 @@ permissions:
 
 jobs:
   build:
-    runs-on: windows-latest
+    runs-on: windows-2022
     strategy:
       matrix:
         platform: [x64, x86, ARM64]
@@ -59,6 +59,7 @@ jobs:
         Copy-Item -Path ".\out\$mappedPlatform\defendnot.pdb" -Destination ".\artifacts\$platform\" -Verbose
         Copy-Item -Path ".\out\$mappedPlatform\defendnot-loader.exe" -Destination ".\artifacts\$platform\" -Verbose
         Copy-Item -Path ".\out\$mappedPlatform\defendnot-loader.pdb" -Destination ".\artifacts\$platform\" -Verbose
+        Copy-Item -Path ".\extra-strip.bat" -Destination ".\artifacts\$platform\" -Verbose
       shell: pwsh
 
     - name: Upload artifacts

README.md

@@ -7,16 +7,21 @@ An even funnier way to disable windows defender.
 > [!CAUTION]
 > **Permitted Use Notice**: 
 > 
-> Using this tool to facilitate malware distribution, cybercrime, unauthorized access, evading detection, or any illegal activity is strictly prohibited.
+> Using this tool to facilitate malware distribution, or any illegal activity is strictly prohibited.
 > 
-> Users assume all legal responsibility for how they use this tool and any consequences thereof. You must comply with all applicable local, state, federal, and international laws when using this tool.
+> Users assume all legal responsibility for how they use this tool and any consequences thereof. You must comply with all applicable laws when using this tool.
 > 
-> By downloading, installing, or using this tool, you acknowledge that you have read, understood, and agree to these terms.
+> By downloading, installing, or using this tool, you acknowledge that you agree to these terms.
 
 ## Installation
 
 > [!WARNING]
-> You may need to temporarily disable realtime and tamper protection before proceeding, otherwise defender will block `defendnot` binaries due to the `VirTool:Win64/Defnot.A` detection. 
+> You may need to temporarily disable realtime and tamper protection before proceeding, otherwise defender will block defendnot binaries from running.
+>
+> On newer Windows 11 builds you may also have to turn off Smart App Control.
+>
+> - Real-time protection: `windowsdefender://threatsettings/`
+> - Smart App Control: `windowsdefender://appbrowser/`
 
 ### One-liner
 
@@ -26,14 +31,17 @@ Open the powershell as administrator and execute any of these:
 # Example 1: Basic installation
 irm https://dnot.sh/ | iex
 
-# Example 2: With custom AV name
+# Example 2: With custom AV name and firewall
-& ([ScriptBlock]::Create((irm https://dnot.sh/))) --name "Custom AV name"
+& ([ScriptBlock]::Create((irm https://dnot.sh/))) --name "Custom AV name" --firewall
 
 # Example 3: Without allocating console
 & ([ScriptBlock]::Create((irm https://dnot.sh/))) --silent
 
 # Example 4: Run once, without allocating console
 & ([ScriptBlock]::Create((irm https://dnot.sh/))) --silent --disable-autorun
+
+# Example 5: Uninstall
+& ([ScriptBlock]::Create((irm https://dnot.sh/))) --disable
 ```
 
 ### Manual
@@ -43,7 +51,7 @@ Download the [latest](https://github.com/es3n1n/defendnot/releases/latest) relea
 ## Usage
 
 ```commandline
-Usage: defendnot-loader [--help] [--version] [--name VAR] [--disable] [--verbose] [--silent] [--autorun-as-user] [--disable-autorun]
+Usage: defendnot-loader [--help] [--version] [--name VAR] [--disable] [--verbose] [--firewall] [--silent] [--autorun-as-user] [--disable-autorun]
 
 Optional arguments:
   -h, --help         prints help message and exits
@@ -51,38 +59,22 @@ Optional arguments:
   -n, --name         av display name [default: "dnot.sh"]
   -d, --disable      disable defendnot
   -v, --verbose      verbose logging
+  --firewall         also register a fake firewall
   --silent           do not allocate console
   --autorun-as-user  create autorun task as currently logged in user
   --disable-autorun  disable autorun task creation
 ```
 
-## How it works
+## Stripping Defender out further (optional)
 
-There's a WSC (Windows Security Center) service in Windows which is used by antiviruses to let Windows know that there's some other antivirus in the hood and it should disable Windows Defender.  
+defendnot only registers a fake AV through WSC, but if you want to strip more Defender stuff out, run the optional `extra-strip.bat` as admin after defendnot is active. It disables a bunch more Defender policies in registry: real-time monitoring, behavior monitoring, cloud reporting, signature updates, etc.
-This WSC API is undocumented and furthermore requires people to sign an NDA with Microsoft to get its documentation.
 
-The initial implementation of [no-defender](https://github.com/es3n1n/no-defender) used thirdparty code provided by other AVs to register itself in the WSC, while `defendnot` interacts with WSC directly.
+It's a separate script because the keys are finicky and undoing them on `--disable` would mean saving every value first somewhere and writing all of them back, which is _waaay_ more bookkeeping than I feel like implementing.
 
 ## Limitations
 
 - **Needs to stay on disk:**  
-  To keep the AV registration persistent after reboot, `defendnot` adds itself to autorun. That means the binaries have to remain on your system for the Defender "disable" to stick.
+  To keep the AV registration after reboot, defendnot adds itself to autorun.
-  
-- **No support for Windows Server:**  
-  The Windows Security Center (WSC) service doesn't exist on Windows Server editions, so `defendnot` *won't* work there. See [#17](https://github.com/es3n1n/defendnot/issues/17).
-
-- **Defender Detection:**  
-  Windows Defender really doesn't like `defendnot` and will flag or remove it as `VirTool:Win64/Defnot.A`. You'll need to (temporarily) disable Defender's real-time and tamper protection to install.
-
-## Legitimate Use Cases
-
-- Reducing resource consumption in development environments
-- Testing system performance under different security configurations
-- Educational research on Windows security mechanisms
-- Home lab experimentation and learning
-
-> [!IMPORTANT]
-> If your intended usage falls outside these legitimate use cases, support in issues/DMs might be denied without any further explanations.
 
 ## Writeup
 

cxx-shared/shared/ctx.hpp

@@ -6,6 +6,7 @@
 
 #include "shared/util.hpp"
 
+#pragma pack(push, 1)
 namespace shared {
     constexpr std::size_t kMaxNameLength = 128;
     constexpr std::string_view kCtxPath = "ctx.bin";
@@ -28,6 +29,7 @@ namespace shared {
         State state = State::ON;
         bool verbose = false;
         std::array<char, kMaxNameLength + 1> name = {0}; // +1 for the nullterm
+        bool register_firewall = false;
 
         void serialize() const {
             std::ofstream stream(detail::ctx_path(), std::ios::binary);
@@ -50,3 +52,4 @@ namespace shared {
 
     static_assert(std::is_trivially_copyable_v<Context>);
 } // namespace shared
+#pragma pack(pop)

cxx-shared/shared/strings.hpp

@@ -5,7 +5,7 @@
 namespace strings {
     constexpr std::string_view kProjectName = "defendnot";
     constexpr std::string_view kRepoUrl = "https://github.com/es3n1n/defendnot";
-    constexpr std::string_view kVersion = "1.5.0";
+    constexpr std::string_view kVersion = "1.6.0";
 
     constexpr std::string_view kDefaultAVName = "dnot.sh";
 

defendnot-loader/core/core.hpp

@@ -2,6 +2,8 @@
 #include <string>
 #include <string_view>
 
+#include "shared/ctx.hpp"
+
 #include <Windows.h>
 
 namespace loader {
@@ -16,9 +18,17 @@ namespace loader {
         bool disable;
         bool alloc_console;
         bool verbose;
+        bool register_firewall;
         bool from_autorun;
         AutorunType autorun_type;
         bool enable_autorun;
+
+        Config& operator=(const shared::Context& ctx) {
+            verbose = ctx.verbose;
+            register_firewall = ctx.register_firewall;
+            name = ctx.name.data();
+            return *this;
+        }
     };
 
     [[nodiscard]] HANDLE inject(std::string_view dll_path, std::string_view proc_name);

defendnot-loader/main.cpp

@@ -25,6 +25,7 @@ namespace {
 
         shared::ctx.state = config.disable ? shared::State::OFF : shared::State::ON;
         shared::ctx.verbose = config.verbose;
+        shared::ctx.register_firewall = config.register_firewall;
         std::ranges::copy(config.name, shared::ctx.name.data());
 
         /// No need to overwrite ctx if we are called from autorun
@@ -100,6 +101,7 @@ int main(int argc, char* argv[]) try {
     program.add_argument("-n", "--name").help("av display name").default_value(std::string(strings::kDefaultAVName)).nargs(1);
     program.add_argument("-d", "--disable").help(std::format("disable {}", strings::kProjectName)).default_value(false).implicit_value(true);
     program.add_argument("-v", "--verbose").help("verbose logging").default_value(false).implicit_value(true);
+    program.add_argument("--firewall").help("also register a fake firewall").default_value(false).implicit_value(true);
     program.add_argument("--silent").help("do not allocate console").default_value(false).implicit_value(true);
     program.add_argument("--autorun-as-user").help("create autorun task as currently logged in user").default_value(false).implicit_value(true);
     program.add_argument("--disable-autorun").help("disable autorun task creation").default_value(false).implicit_value(true);
@@ -120,6 +122,7 @@ int main(int argc, char* argv[]) try {
         .disable = program.get<bool>("-d"),
         .alloc_console = !program.get<bool>("--silent"),
         .verbose = program.get<bool>("-v"),
+        .register_firewall = program.get<bool>("--firewall"),
         .from_autorun = program.get<bool>("--from-autorun"),
         .autorun_type = program.get<bool>("--autorun-as-user") ? /// As system on boot is the default value
                             loader::AutorunType::AS_CURRENT_USER_ON_LOGIN :
@@ -130,7 +133,7 @@ int main(int argc, char* argv[]) try {
     /// When running from autorun, we'll be missing all the cli arguments, so lets load some relevant ones
     if (config.from_autorun) {
         shared::ctx.deserialize();
-        config.verbose = shared::ctx.verbose;
+        config = shared::ctx;
     }
 
     if (!config.alloc_console && config.verbose) {

defendnot/bootstrap/bootstrap.cpp

@@ -8,27 +8,41 @@
 
 namespace defendnot {
     namespace {
+        void activate(const auto& step, IWscASStatus* inst) {
+            step("update", inst->UpdateStatus(WSCSecurityProductState::ON, TRUE));
+        }
+
+        void activate(const auto& step, IWscAVStatus4* inst) {
+            step("update", inst->UpdateStatus(WSCSecurityProductState::ON, TRUE));
+            step("scan_update", inst->UpdateScanSubstatus(WSCSecurityProductSubStatus::NO_ACTION));
+            step("settings_update", inst->UpdateSettingsSubstatus(WSCSecurityProductSubStatus::NO_ACTION));
+            step("prot_update", inst->UpdateProtectionUpdateSubstatus(WSCSecurityProductSubStatus::NO_ACTION));
+        }
+
+        void activate(const auto& step, IWscFWStatus2* inst) {
+            step("update", inst->UpdateStatus(WSCSecurityProductState::ON));
+            step("domain_update", inst->UpdateDomainProfileSubstatus(WSCSecurityProductSubStatus::NO_ACTION));
+            step("private_update", inst->UpdatePrivateProfileSubstatus(WSCSecurityProductSubStatus::NO_ACTION));
+            step("public_update", inst->UpdatePublicProfileSubstatus(WSCSecurityProductSubStatus::NO_ACTION));
+        }
+
         template <com::ComObject Ty>
-        void apply(const std::string_view log_prefix, const BSTR name) {
+        void apply(const std::string_view log_prefix, const BSTR name, const bool should_register) {
             /// Get the WSC interface
             auto inst = com::query<Ty>();
 
-            /// This can fail if we dont have any products registered so no com_checked
+            /// This can fail if we dont have any products registered so no com::checked
             logln("{}_unregister: {:#x}", log_prefix, com::retry_while_pending([&inst]() -> HRESULT { return inst->Unregister(); }) & 0xFFFFFFFF);
-            if (shared::ctx.state == shared::State::OFF) {
+            if (!should_register) {
                 return;
             }
 
             /// Register and activate
-            logln("{}_register: {:#x}", log_prefix, com::checked(inst->Register(name, name, 0, 0)));
+            const auto step = [&](const std::string_view what, const HRESULT hr) -> void {
-            logln("{}_update: {:#x}", log_prefix, com::checked(inst->UpdateStatus(WSCSecurityProductState::ON, static_cast<BOOL>(true))));
+                logln("{}_{}: {:#x}", log_prefix, what, com::checked(hr));
-
+            };
-            /// Update the substatuses, if the interface supports this
+            step("register", inst->Register(name, name, 0, 0));
-            if constexpr (std::is_same_v<Ty, IWscAVStatus4>) {
+            activate(step, inst.get());
-                logln("{}_scan_update: {:#x}", log_prefix, com::checked(inst->UpdateScanSubstatus(WSCSecurityProductSubStatus::NO_ACTION)));
-                logln("{}_settings_update: {:#x}", log_prefix, com::checked(inst->UpdateSettingsSubstatus(WSCSecurityProductSubStatus::NO_ACTION)));
-                logln("{}_prot_update: {:#x}", log_prefix, com::checked(inst->UpdateProtectionUpdateSubstatus(WSCSecurityProductSubStatus::NO_ACTION)));
-            }
         }
     } // namespace
 
@@ -45,12 +59,14 @@ namespace defendnot {
 
         /// Convert to BSTR
         auto name = SysAllocString(name_w.c_str());
-        defer->void {
+        defer {
             SysFreeString(name);
         };
 
         /// Register our stuff in the WSC interfaces
-        apply<IWscASStatus>("IWscASStatus", name);
+        const bool enabled = shared::ctx.state != shared::State::OFF;
-        apply<IWscAVStatus4>("IWscAVStatus4", name);
+        apply<IWscASStatus>("IWscASStatus", name, enabled);
+        apply<IWscAVStatus4>("IWscAVStatus4", name, enabled);
+        apply<IWscFWStatus2>("IWscFWStatus2", name, enabled && shared::ctx.register_firewall);
     }
 } // namespace defendnot

defendnot/core/com.hpp

@@ -69,4 +69,14 @@ namespace defendnot {
         virtual HRESULT COM_CALLCONV Unregister() = 0;
         virtual HRESULT COM_CALLCONV UpdateStatus(WSCSecurityProductState state, BOOL unk) = 0;
     };
+
+    class IWscFWStatus2 : public com::IBaseObject<detail::CLSID_WscIsv, detail::IID_IWscFWStatus2> {
+    public:
+        virtual HRESULT COM_CALLCONV Register(BSTR path_to_signed_product_exe, BSTR display_name, std::uint32_t, std::uint32_t) = 0;
+        virtual HRESULT COM_CALLCONV Unregister() = 0;
+        virtual HRESULT COM_CALLCONV UpdateStatus(WSCSecurityProductState state) = 0;
+        virtual HRESULT COM_CALLCONV UpdateDomainProfileSubstatus(WSCSecurityProductSubStatus status) = 0;
+        virtual HRESULT COM_CALLCONV UpdatePrivateProfileSubstatus(WSCSecurityProductSubStatus status) = 0;
+        virtual HRESULT COM_CALLCONV UpdatePublicProfileSubstatus(WSCSecurityProductSubStatus status) = 0;
+    };
 } // namespace defendnot

extra-strip.bat

@@ -0,0 +1,30 @@
+:: based on https://github.com/es3n1n/defendnot/issues/49 comments
+@echo off
+setlocal
+
+net session >nul 2>&1
+if %errorlevel% neq 0 (
+    echo This script needs administrator rights
+    pause
+    exit /b 1
+)
+
+reg.exe ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender" /v DisableAntiSpyware /t REG_DWORD /d 00000001 /f
+reg.exe ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender" /v DisableAntiVirus /t REG_DWORD /d 00000001 /f
+reg.exe ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender" /v DisableRoutinelyTakingAction /t REG_DWORD /d 00000001 /f
+reg.exe ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender" /v ServiceKeepAlive /t REG_DWORD /d 00000000 /f
+reg.exe ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection" /v DisableBehaviorMonitoring /t REG_DWORD /d 00000001 /f
+reg.exe ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection" /v DisableIntrusionPreventionSystem /t REG_DWORD /d 00000001 /f
+reg.exe ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection" /v DisableIOAVProtection /t REG_DWORD /d 00000001 /f
+reg.exe ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection" /v DisableOnAccessProtection /t REG_DWORD /d 00000001 /f
+reg.exe ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection" /v DisableRawWriteNotification /t REG_DWORD /d 00000001 /f
+reg.exe ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection" /v DisableRealtimeMonitoring /t REG_DWORD /d 00000001 /f
+reg.exe ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection" /v DisableScanOnRealtimeEnable /t REG_DWORD /d 00000001 /f
+reg.exe ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Signature Updates" /v DisableUpdateOnStartupWithoutEngine /t REG_DWORD /d 00000001 /f
+reg.exe ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Signature Updates" /v UpdateOnStartup /t REG_DWORD /d 00000000 /f
+reg.exe ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\SpyNet" /v DisableBlockAtFirstSeen /t REG_DWORD /d 00000001 /f
+reg.exe ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\SpyNet" /v SpynetReporting /t REG_DWORD /d 00000000 /f
+
+echo All done, please restart your machine to apply these changes
+pause
+endlocal