diff --git a/atomics/T1090/T1090.yaml b/atomics/T1090/T1090.yaml
new file mode 100644
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+++ b/atomics/T1090/T1090.yaml
@@ -0,0 +1,34 @@
+---
+attack_technique: T1090
+display_name: Connection Proxy
+
+atomic_tests:
+- name: Connection Proxy
+  description: |
+    Enable traffic redirection.
+
+    To undo changes made by this test:
+      unset http_proxy
+      unset https_proxy
+
+    Note that this test may conflict with pre-existing system configuration.
+
+  supported_platforms:
+    - macos
+    - linux
+
+  input_arguments:
+    proxy_server:
+      description: Proxy server URL (host:port)
+      type: url
+      default: 127.0.0.1:8080
+
+    proxy_scheme:
+      description: Protocol to proxy (http or https)
+      type: string
+      default: http
+
+  executor:
+    name: sh
+    command: |
+      export #{proxy_scheme}_proxy=#{proxy_server}