cache sysinfo (we use it a lot, it will not change)

Author: busterb

lib/rex/post/meterpreter/extensions/stdapi/sys/config.rb

@@ -87,16 +87,19 @@ def getenv(var_name)
   #
   def sysinfo
     request  = Packet.create_request('stdapi_sys_config_sysinfo')
-    response = client.send_request(request)
-
-    {
-      'Computer'        => response.get_tlv_value(TLV_TYPE_COMPUTER_NAME),
-      'OS'              => response.get_tlv_value(TLV_TYPE_OS_NAME),
-      'Architecture'    => response.get_tlv_value(TLV_TYPE_ARCHITECTURE),
-      'System Language' => response.get_tlv_value(TLV_TYPE_LANG_SYSTEM),
-      'Domain'          => response.get_tlv_value(TLV_TYPE_DOMAIN),
-      'Logged On Users' => response.get_tlv_value(TLV_TYPE_LOGGED_ON_USER_COUNT)
-    }
+    if @sysinfo.nil?
+      response = client.send_request(request)
+
+      @sysinfo = {
+        'Computer'        => response.get_tlv_value(TLV_TYPE_COMPUTER_NAME),
+        'OS'              => response.get_tlv_value(TLV_TYPE_OS_NAME),
+        'Architecture'    => response.get_tlv_value(TLV_TYPE_ARCHITECTURE),
+        'System Language' => response.get_tlv_value(TLV_TYPE_LANG_SYSTEM),
+        'Domain'          => response.get_tlv_value(TLV_TYPE_DOMAIN),
+        'Logged On Users' => response.get_tlv_value(TLV_TYPE_LOGGED_ON_USER_COUNT)
+      }
+    end
+    @sysinfo
   end
 
   #