diff --git a/pkgs/tools/security/ruler/default.nix b/pkgs/tools/security/ruler/default.nix
new file mode 100644
index 000000000000..2a42a3de2813
--- /dev/null
+++ b/pkgs/tools/security/ruler/default.nix
@@ -0,0 +1,28 @@
+{ lib
+, stdenv
+, buildGoModule
+, fetchFromGitHub
+}:
+
+buildGoModule rec {
+  pname = "ruler";
+  version = "2.4.1";
+
+  src = fetchFromGitHub {
+    owner = "sensepost";
+    repo = pname;
+    rev = version;
+    hash = "sha256-cEYpK1LB9b65xr6MCMax1vUtSWefjJdXNs4sPgx65d0=";
+  };
+
+  vendorHash = "sha256-ITd3cvZmRBWK3922dDRvNHNH8KzHoVfIQI6S318ibxA=";
+
+  meta = with lib; {
+    description = "Tool to abuse Exchange services";
+    homepage = "https://github.com/sensepost/ruler";
+    # Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International Public License
+    # https://github.com/sensepost/ruler/blob/master/LICENSE
+    license = with licenses; [ unfree ];
+    maintainers = with maintainers; [ fab ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index c5cd5bbd6269..3c8775a8e0da 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -763,6 +763,8 @@ with pkgs;
 
   run = callPackage ../development/tools/run { };
 
+  ruler = callPackage ../tools/security/ruler { };
+
   mblock-mlink = callPackage ../development/tools/mblock-mlink { };
 
   mod = callPackage ../development/tools/mod { };