Added an event for default stable rule Drop and execute new binary in…

… container

Signed-off-by: GLVS Kiriti <[email protected]>

events/syscall/drop_and_execute_new_binary_in_container.go

@@ -0,0 +1,52 @@
+// SPDX-License-Identifier: Apache-2.0
+/*
+Copyright (C) 2024 The Falco Authors.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package syscall
+
+import (
+	"os"
+	"os/exec"
+
+	"github.com/falcosecurity/event-generator/events"
+)
+
+var _ = events.Register(DropAndExecuteNewBinaryInContainer)
+
+func DropAndExecuteNewBinaryInContainer(h events.Helper) error {
+	if h.InContainer() {
+		binaryPath := "/tmp/created-by-event-generator"
+		exampleCode := `package main
+		func main() {}`
+
+		err := os.WriteFile(binaryPath+".go", []byte(exampleCode), 0644) // Create a sample .go file
+		if err != nil {
+			h.Log().WithError(err).Error("failed to write source code to file")
+			return err
+		}
+		defer os.Remove(binaryPath + ".go") // Remove at end
+
+		// Compile the .go file into an executable binary
+		compileCmd := exec.Command("go", "build", "-o", binaryPath, binaryPath+".go")
+		if err := compileCmd.Run(); err != nil {
+			h.Log().WithError(err).Error("failed to compile Go code")
+			return err
+		}
+		defer os.Remove(binaryPath) // Remove at end
+
+		executeCmd := exec.Command(exampleCode)
+		h.Log().Info("Executed a binary not part of base image")
+		return executeCmd.Run()
+	}
+	return nil
+}