diff --git a/README.md b/README.md
index 32ca538..66ca56f 100644
--- a/README.md
+++ b/README.md
@@ -116,6 +116,8 @@ Create your module in [misp_modules/modules/expansion/](misp_modules/modules/exp
 
 Don't forget to return an error key and value if an error is raised to propagate it to the MISP user-interface.
 
+Your module's script name should also be added in the `__all__` list of `<module type folder>/__init__.py` in order for it to be loaded.
+
 ~~~python
 ...
     # Checking for required value
@@ -207,6 +209,19 @@ def handler(q=False):
                 codecs.encode(src, "rot-13")}
 ~~~
 
+#### export module
+
+For an export module, the `request["data"]` object corresponds to a list of events (dictionaries) to handle.
+
+Iterating over events attributes is performed using their `Attribute` key.
+
+~~~python
+...
+for event in request["data"]:
+        for attribute in event["Attribute"]:
+          # do stuff w/ attribute['type'], attribute['value'], ...
+...
+
 ### Returning Binary Data
 
 If you want to return a file or other data you need to add a data attribute.
diff --git a/misp_modules/modules/export_mod/osqueryexport.py b/misp_modules/modules/export_mod/osqueryexport.py
index a1535d8..084762e 100755
--- a/misp_modules/modules/export_mod/osqueryexport.py
+++ b/misp_modules/modules/export_mod/osqueryexport.py
@@ -42,7 +42,7 @@ def handle_regkeyvalue(value):
     return 'SELECT * FROM registry WHERE path LIKE \'%s\' AND data LIKE \'%s\';' % (key, value)
 
 def handle_mutex(value):
-    return 'not implemented yet'
+    return 'SELECT * FROM winbaseobj WHERE object_name LIKE \'%s\';' % value
 
 def handle_service(value):
     return 'SELECT * FROM services WHERE display_name LIKE \'%s\' OR name like \'%s\';' % (value, value)