scripts/handlers cannot start with numbers

Author: jhart-r7

modules/exploits/linux/http/f5_icall_cmd.rb

@@ -227,9 +227,8 @@ def exploit
       return false
     end
 
-    print_status('Uploading payload script...')
-
-    script_name = Rex::Text.rand_text_alphanumeric(16)
+    script_name = "script-#{Rex::Text.rand_text_alphanumeric(16)}"
+    print_status("Uploading payload script #{script_name}")
     create_script_res = create_script(script_name, cmd)
     unless create_script_res && create_script_res.code == 200
       print_error("Upload payload script failed")
@@ -242,8 +241,8 @@ def exploit
     register_file_for_cleanup @payload_path
 
     # phase 2: create iCall Handler, that will actually run the previously created script
-    print_status('Creating trigger...')
-    handler_name = Rex::Text.rand_text_alphanumeric(16)
+    handler_name = "handler-#{Rex::Text.rand_text_alphanumeric(16)}"
+    print_status("Creating trigger #{handler_name}")
     unless create_handler(handler_name, script_name)
       print_error('Payload script uploaded but trigger creation failed')
       delete_script(script_name)