From 91fbc39084c8eb869cbb3fc2833269af8574fa14 Mon Sep 17 00:00:00 2001
From: protections machine
 <72879786+protectionsmachine@users.noreply.github.com>
Date: Wed, 23 Oct 2024 19:43:47 +1100
Subject: [PATCH] Sync RTA MSR Write Access Enabled (#4189)

Co-authored-by: shashank-elastic <91139415+shashank-elastic@users.noreply.github.com>
---
 ...linux_impact_enable_write_access_to_msr.py | 40 +++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 rta/linux_impact_enable_write_access_to_msr.py

diff --git a/rta/linux_impact_enable_write_access_to_msr.py b/rta/linux_impact_enable_write_access_to_msr.py
new file mode 100644
index 000000000..90b7df179
--- /dev/null
+++ b/rta/linux_impact_enable_write_access_to_msr.py
@@ -0,0 +1,40 @@
+# 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="cf8104ca-bd23-4652-b1f7-b63e3d92bc66",
+    platforms=["linux"],
+    endpoint=[
+        {
+            "rule_name": "MSR Write Access Enabled",
+            "rule_id": "4342c282-ee21-4140-8e27-4e0f551489ef",
+        },
+    ],
+    techniques=["T1496", "T1059"],
+)
+
+
+@common.requires_os(*metadata.platforms)
+def main() -> None:
+    common.log("Creating a fake executable..")
+    masquerade = "/tmp/modprobe"
+
+    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, 'msr', "allow_writes=on"]
+    common.execute([*commands], timeout=5, kill=True)
+    common.log("Cleaning...")
+    common.remove_file(masquerade)
+    common.log("Simulation successfull!")
+
+
+if __name__ == "__main__":
+    sys.exit(main())