react_sync_rta_updates_4215 Network Connection by Foomatic-rip Child (#…

…4196)

(cherry picked from commit 77f0ee8)

rta/linux_command_and_control_cupsd_foomatic_rip_netcon.py

@@ -0,0 +1,52 @@
+# Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+# or more contributor license agreements. Licensed under the Elastic License
+# 2.0; you may not use this file except in compliance with the Elastic License
+# 2.0.
+
+import sys
+from . import RtaMetadata, common
+
+metadata = RtaMetadata(
+    uuid="8c634401-fd71-475e-b449-41b776b2b8c9",
+    platforms=["linux"],
+    endpoint=[
+        {
+            "rule_name": "Network Connection by Foomatic-rip Child",
+            "rule_id": "93d7b72d-3914-44fb-92bf-63675769ef12",
+        },
+    ],
+    techniques=["T1203"],
+)
+
+
+@common.requires_os(*metadata.platforms)
+def main() -> None:
+    # Path for the fake executable
+    masquerade = "/tmp/foomatic-rip"
+    source = common.get_path("bin", "netcon_exec_chain.elf")
+
+    common.log("Creating a fake executable..")
+    common.copy_file(source, masquerade)
+    common.log("Granting execute permissions...")
+    common.execute(['chmod', '+x', masquerade])
+
+    # Execute the fake executable
+    common.log("Executing the fake executable..")
+    commands = [
+        masquerade,
+        'chain',
+        '-h',
+        '8.8.8.8',
+        '-p',
+        '53',
+        '-c',
+        '/tmp/foomatic-rip netcon -h 8.8.8.8 -p 53'
+    ]
+    common.execute([*commands], timeout=5, kill=True)
+
+    # Cleanup
+    common.remove_file(masquerade)
+
+
+if __name__ == "__main__":
+    sys.exit(main())