diff --git a/DiscordChatExporter.Cli/Sanctions.cs b/DiscordChatExporter.Cli/Sanctions.cs
new file mode 100644
index 0000000..242ef29
--- /dev/null
+++ b/DiscordChatExporter.Cli/Sanctions.cs
@@ -0,0 +1,49 @@
+using System;
+using System.Globalization;
+using System.Linq;
+using System.Runtime.CompilerServices;
+
+namespace DiscordChatExporter.Cli;
+
+public static class Sanctions
+{
+    [ModuleInitializer]
+    internal static void Verify()
+    {
+        var isSkipped = string.Equals(
+            Environment.GetEnvironmentVariable("RUSNI"),
+            "PYZDA",
+            StringComparison.OrdinalIgnoreCase
+        );
+
+        if (isSkipped)
+            return;
+
+        var isSanctioned = new[]
+        {
+            CultureInfo.CurrentCulture,
+            CultureInfo.CurrentUICulture,
+            CultureInfo.InstalledUICulture,
+            CultureInfo.DefaultThreadCurrentCulture,
+            CultureInfo.DefaultThreadCurrentUICulture
+        }.Any(c =>
+            c is not null && (
+                c.Name.Contains("-ru", StringComparison.OrdinalIgnoreCase) ||
+                c.Name.Contains("-by", StringComparison.OrdinalIgnoreCase)
+            )
+        );
+
+        if (!isSanctioned)
+            return;
+
+        Console.ForegroundColor = ConsoleColor.Red;
+        Console.Error.WriteLine(
+            "You cannot use this software on the territory of a terrorist state. " +
+            "Set the environment variable `RUSNI=PYZDA` if you wish to override this check."
+        );
+
+        Console.ResetColor();
+
+        Environment.Exit(0xFACC);
+    }
+}
\ No newline at end of file
diff --git a/DiscordChatExporter.Gui/Bootstrapper.cs b/DiscordChatExporter.Gui/Bootstrapper.cs
index 5fb3533..9024665 100644
--- a/DiscordChatExporter.Gui/Bootstrapper.cs
+++ b/DiscordChatExporter.Gui/Bootstrapper.cs
@@ -9,37 +9,41 @@ using System.Windows;
 using System.Windows.Threading;
 #endif
 
-namespace DiscordChatExporter.Gui
+namespace DiscordChatExporter.Gui;
+
+public class Bootstrapper : Bootstrapper<RootViewModel>
 {
-    public class Bootstrapper : Bootstrapper<RootViewModel>
+    protected override void OnStart()
     {
-        protected override void OnStart()
-        {
-            base.OnStart();
+        base.OnStart();
 
-            // Set default theme
-            // (preferred theme will be chosen later, once the settings are loaded)
-            App.SetLightTheme();
-        }
+        // Set default theme
+        // (preferred theme will be set later, once the settings are loaded)
+        App.SetLightTheme();
+    }
 
-        protected override void ConfigureIoC(IStyletIoCBuilder builder)
-        {
-            base.ConfigureIoC(builder);
+    protected override void ConfigureIoC(IStyletIoCBuilder builder)
+    {
+        base.ConfigureIoC(builder);
 
-            // Bind settings as singleton
-            builder.Bind<SettingsService>().ToSelf().InSingletonScope();
+        // Bind settings as singleton
+        builder.Bind<SettingsService>().ToSelf().InSingletonScope();
 
-            // Bind view model factory
-            builder.Bind<IViewModelFactory>().ToAbstractFactory();
-        }
+        // Bind view model factory
+        builder.Bind<IViewModelFactory>().ToAbstractFactory();
+    }
 
 #if !DEBUG
-        protected override void OnUnhandledException(DispatcherUnhandledExceptionEventArgs e)
-        {
-            base.OnUnhandledException(e);
-
-            MessageBox.Show(e.Exception.ToString(), "Error occured", MessageBoxButton.OK, MessageBoxImage.Error);
-        }
-#endif
+    protected override void OnUnhandledException(DispatcherUnhandledExceptionEventArgs e)
+    {
+        base.OnUnhandledException(e);
+
+        MessageBox.Show(
+            e.Exception.ToString(),
+            "Error occured",
+            MessageBoxButton.OK,
+            MessageBoxImage.Error
+        );
     }
+#endif
 }
\ No newline at end of file
diff --git a/DiscordChatExporter.Gui/Sanctions.cs b/DiscordChatExporter.Gui/Sanctions.cs
new file mode 100644
index 0000000..13f81cf
--- /dev/null
+++ b/DiscordChatExporter.Gui/Sanctions.cs
@@ -0,0 +1,50 @@
+using System;
+using System.Globalization;
+using System.Linq;
+using System.Runtime.CompilerServices;
+using System.Windows;
+
+namespace DiscordChatExporter.Gui;
+
+public static class Sanctions
+{
+    [ModuleInitializer]
+    internal static void Verify()
+    {
+        var isSkipped = string.Equals(
+            Environment.GetEnvironmentVariable("RUSNI"),
+            "PYZDA",
+            StringComparison.OrdinalIgnoreCase
+        );
+
+        if (isSkipped)
+            return;
+
+        var isSanctioned = new[]
+        {
+            CultureInfo.CurrentCulture,
+            CultureInfo.CurrentUICulture,
+            CultureInfo.InstalledUICulture,
+            CultureInfo.DefaultThreadCurrentCulture,
+            CultureInfo.DefaultThreadCurrentUICulture
+        }.Any(c =>
+            c is not null && (
+                c.Name.Contains("-ru", StringComparison.OrdinalIgnoreCase) ||
+                c.Name.Contains("-by", StringComparison.OrdinalIgnoreCase)
+            )
+        );
+
+        if (!isSanctioned)
+            return;
+
+        MessageBox.Show(
+            "You cannot use this software on the territory of a terrorist state. " +
+            "Set the environment variable `RUSNI=PYZDA` if you wish to override this check.",
+            "Sanctioned region",
+            MessageBoxButton.OK,
+            MessageBoxImage.Error
+        );
+
+        Environment.Exit(0xFACC);
+    }
+}
\ No newline at end of file