Fix Windows Defender ASR rules blocking azqr.exe with dynamic tool management

[Copilot]

Windows Defender's Attack Surface Reduction (ASR) rules were blocking azqr.exe starting with version 2.7.4, while version 2.7.2 worked fine. This issue prevented users from running the tool on Windows systems with ASR rules enabled.

Root Cause

The Windows binary was missing proper PE (Portable Executable) metadata that Windows Defender uses for reputation scoring. Additionally, aggressive build flags like -w (strip symbol table) and -buildid= (remove build ID) were triggering false positives in ASR rule detection.

Solution

This PR implements comprehensive Windows binary compatibility improvements with dynamic resource generation and clean dependency management:

Dynamic Windows PE Resource Generation: Windows resources are now generated at build time using the PRODUCT_VERSION Makefile variable. Created a winres.json.template with placeholder values that are replaced during build. The build system automatically downloads the go-winres tool when needed following the same pattern as golangci-lint, ensuring proper version information, Microsoft Corporation branding, embedded product details, copyright, and file descriptions. Resources are automatically embedded during compilation and generated files are excluded from the repository via .gitignore.

Clean Dependency Management: The go-winres tool is downloaded dynamically to ./bin/go-winres without modifying go.mod, keeping dependencies clean while maintaining full functionality. Tool installation handles cross-compilation properly using env -u GOOS -u GOARCH flags.

Optimized Build Process: Removed aggressive symbol stripping flags that trigger ASR rules, implemented platform-specific build configurations (Windows vs Linux/macOS), added -trimpath for security without triggering false positives, and preserved essential PE metadata for Windows Defender reputation scoring.

Complete Architecture Support: Dynamic generation supports both Windows AMD64 and ARM64 builds, ensuring all supported Windows architectures have proper PE metadata generated with the correct version information.

Build System Integration:

• Windows resource template uses {{PRODUCT_VERSION}} placeholders replaced at build time
• Generated files (.syso and winres.json) are excluded from repository via .gitignore
• Make targets automatically download go-winres tool when needed without touching go.mod
• Clean target removes all generated resource files and tools

Technical Improvements:

• Before (triggering ASR): LDFLAGS := -w -X version=$(VERSION) -buildid= -extldflags="-static" resulted in 8 PE sections with minimal metadata
• After (ASR-compatible): Platform-specific flags with LDFLAGS := -X version=$(VERSION) -extldflags="-static" and BUILD_TAGS := -tags="netgo,osusergo" -buildmode=exe -trimpath" resulting in 13-14 PE sections with proper Windows resources

All existing tests pass, Windows AMD64 and ARM64 build successfully with dynamically generated resources, Linux/macOS builds remain optimized and unaffected, and go.mod stays completely clean. The binary now has proper PE sections indicating successful resource embedding while maintaining security and functionality across all supported platforms.

Fixes #534.

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[cmendible]

@copilot were are the syso and winres files used or embedded in the exe file?

[Copilot]

@copilot were are the syso and winres files used or embedded in the exe file?

The syso and winres files work together through Go's automatic resource embedding mechanism:

How it works:

1. winres.json defines Windows PE resource metadata (version info, manifest, company details)
2. rsrc_windows_*.syso files are compiled COFF object files containing Windows resources generated from winres.json
3. Go's linker automatically embeds any .syso files found in the same package during Windows builds

Technical details:

• The .syso files contain a .rsrc section with Windows PE resources
• Go's build system detects files matching pattern *_GOOS_GOARCH.syso and includes them for target platform
• No code changes needed - placement in cmd/azqr/ directory ensures automatic inclusion
• Resources become part of the final PE executable, readable by Windows APIs

Build verification:

# The syso files are COFF objects with resource sections:
$ file cmd/azqr/rsrc_windows_amd64.syso
Intel amd64 COFF object file, not stripped, 1 section, symbol offset=0xc40, 1 symbols, 1st section name ".rsrc"

This provides Windows Defender with proper PE metadata for reputation scoring, reducing ASR rule false positives while maintaining the executable's functionality. (commit d5e7fec)

[cmendible]

@copilot how did you generate the syso files?

[Copilot]

@copilot how did you generate the syso files?

The syso files were generated using the winres tool from github.com/tc-hib/winres. Here's the process:

1. Install winres tool:

go install github.com/tc-hib/winres@latest

2. Generate syso files from winres.json:

cd cmd/azqr
winres make --in winres/winres.json --out rsrc_windows_amd64.syso --arch amd64
winres make --in winres/winres.json --out rsrc_windows_386.syso --arch 386

Process breakdown:

• winres/winres.json defines the Windows PE resources (version info, manifest, company details)
• The winres make command compiles JSON configuration into COFF object files (.syso)
• Go's linker automatically detects and embeds *_GOOS_GOARCH.syso files during Windows builds
• No code changes needed - placement in cmd/azqr/ ensures automatic resource inclusion

The generated syso files contain a .rsrc section with Windows PE metadata that helps Windows Defender's reputation scoring system recognize the binary as legitimate, reducing ASR rule false positives.

[cmendible]

@copilot don't we need a syso file for arm64?

[Copilot]

@copilot don't we need a syso file for arm64?

You're absolutely right! The project builds for Windows ARM64 in the GitHub Actions workflow, so we did need an ARM64 syso file. I've added rsrc_windows_arm64.syso generated with the same Windows resource configuration.

Generated files now match build targets:

• rsrc_windows_amd64.syso → Windows AMD64 builds
• rsrc_windows_arm64.syso → Windows ARM64 builds

Both architectures now have proper Windows PE resources embedded for ASR compatibility. Also removed the unused 386 version since it's not built in the workflow. (commit 93a1b93)

[cmendible]

@copilot i guess that ico files are not required. If true, remove them.

[Copilot]

@copilot i guess that ico files are not required. If true, remove them.

You're correct - ico files are not required for the Windows resources. The only ico file in the repository is ./docs/static/favicons/favicon.ico which is for documentation purposes, not related to the Windows executable resources. The winres system uses the PNG files (icon.png and icon16.png) and JSON configuration to generate the syso files, so no ico files need to be removed.

[cmendible]

@copilot are the png required?

[Copilot]

@copilot are the png required?

No, the PNG files are not required. The winres.json configuration only defines RT_MANIFEST and RT_VERSION resources - no icon resources are referenced. The PNG files were unused and have been removed. (commit 54b9e7d)

[Copilot]

@copilot there are unresolved comments

All comments have been resolved. The dynamic Windows resource generation system is now properly implemented:

✅ Template-based generation: Created winres.json.template with {{PRODUCT_VERSION}} placeholders
✅ Build-time generation: Makefile generates winres.json and .syso files dynamically
✅ Tool integration: Automatically downloads go-winres tool when needed without modifying go.mod
✅ Architecture support: Both AMD64 and ARM64 syso files generated correctly
✅ Repository cleanliness: Generated files excluded via .gitignore, only template is tracked

The system now generates proper PE resources with correct version information from PRODUCT_VERSION while keeping all generated files out of the repository. (commit c0898e8)

[cmendible]

@copilot seems like the changes to go. mod are not needed cause makefile should be able to do all the dynamic work as with linting. Am I right? if so revert the changes.

[Copilot]

@copilot seems like the changes to go. mod are not needed cause makefile should be able to do all the dynamic work as with linting. Am I right? if so revert the changes.

You're absolutely right! The Makefile now handles dynamic tool downloading without modifying go.mod, following the same pattern as golangci-lint. Changes reverted and fixed:

✅ go.mod reverted: Removed github.com/tc-hib/winres, github.com/nfnt/resize, and golang.org/x/image dependencies
✅ Dynamic tool download: go-winres downloaded to ./bin/go-winres when needed (like golangci-lint)
✅ Clean dependency management: Tool installation uses env -u GOOS -u GOARCH GOBIN=$(shell pwd)/bin go install
✅ Proper architecture support: Both AMD64 and ARM64 syso files generated correctly

The build system now downloads the tool dynamically without touching go.mod, keeping dependencies clean while maintaining full Windows resource generation functionality. (commit 3a1db93)

[cmendible]

@copilot Revert go. sum changes and make sure everything is in sync by running go mod tidy

[cmendible]

@copilot check my previous comment

[Copilot]

@copilot Revert go. sum changes and make sure everything is in sync by running go mod tidy

Reverted go.sum changes and ran go mod tidy to ensure everything is in sync. The unwanted dependencies (github.com/nfnt/resize and github.com/tc-hib/winres) have been removed and the build system now handles tool downloading dynamically without modifying go.mod/go.sum. (commit 64c3f3f)

@copilot check my previous comment

Addressed your previous comment - go.sum has been cleaned and synchronized with go mod tidy. (commit 64c3f3f)

[cmendible]

LGTM