Sync RTA Linux Production Tuning (#4014)

rta/linux_execution_interactive_shell_spawn_from_hidden_process.py

@@ -3,8 +3,9 @@
 # 2.0; you may not use this file except in compliance with the Elastic License
 # 2.0.
 
-from . import common
-from . import RtaMetadata
+import sys
+
+from . import RtaMetadata, common
 
 metadata = RtaMetadata(
     uuid="fd5fb7a8-398a-4322-ae28-8f88cce6aa88",
@@ -12,24 +13,23 @@ metadata = RtaMetadata(
     endpoint=[
         {
             "rule_name": "Interactive Shell Spawned via Hidden Process",
-            "rule_id": "52deef30-e633-49e1-9dd2-da1ad6cb5e43"
-        }
+            "rule_id": "52deef30-e633-49e1-9dd2-da1ad6cb5e43",
+        },
     ],
     techniques=["T1059", "T1564"],
 )
 
 
 @common.requires_os(*metadata.platforms)
-def main():
-
+def main() -> None:
     common.log("Creating a fake hidden executable..")
     masquerade = "/tmp/.evil"
     source = common.get_path("bin", "netcon_exec_chain.elf")
     common.copy_file(source, masquerade)
     common.log("Granting execute permissions...")
-    common.execute(['chmod', '+x', masquerade])
+    common.execute(["chmod", "+x", masquerade])
 
-    commands = [masquerade, 'exec', '-c', '-i']
+    commands = [masquerade, "exec", "-c", "-i"]
     common.execute([*commands], timeout=5, kill=True)
     common.log("Cleaning...")
     common.remove_file(masquerade)
@@ -37,4 +37,4 @@ def main():
 
 
 if __name__ == "__main__":
-    exit(main())
+    sys.exit(main())