Sync RTA

rta/linux_defense_evasion_process_injection_via_dd.py

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+# 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="05170b5b-8030-4acd-b7c1-d6d1fe8bbd2d",
+    platforms=["linux"],
+    endpoint=[
+        {
+            "rule_name": "Potential Process Injection via dd",
+            "rule_id": "38108046-32a6-407f-b5fd-6943ffdcdab0",
+        },
+    ],
+    techniques=["T1620", "T1574", "T1106"],
+)
+
+
+@common.requires_os(*metadata.platforms)
+def main() -> None:
+    common.log("Creating a fake executable..")
+    masquerade = "/tmp/dd"
+    source = common.get_path("bin", "linux.ditto_and_spawn")
+    common.copy_file(source, masquerade)
+    common.log("Granting execute permissions...")
+    common.execute(["chmod", "+x", masquerade])
+
+    commands = [masquerade, "if=foo", "of=/proc/pid/mem"]
+    common.execute([*commands], timeout=5, kill=True)
+    common.log("Cleaning...")
+    common.remove_file(masquerade)
+    common.log("Simulation successfull!")
+
+
+if __name__ == "__main__":
+    sys.exit(main())