Wednesday, January 9, 2008

Introduction to Simple Oracle Auditing


This article will introduce the reader to the basics of auditing an Oracle database. Oracle's RDBMS is a functionally rich product and there are a number of auditing alternatives available to the reader. Because auditing Oracle is such a huge subject, doing all of it justice would take an entire book, so this paper will cover the basics of why, when and how to conduct an audit. It will also use a couple of good example cases to illustrate how useful Oracle audit can be to an organization.

The Issues

There are a number of basic issues that should be considered when contemplating using Oracle's auditing features. These are as follows:

* Why is audit needed in Oracle?

Is this a strange question? Well, lots of companies don't actually use the internal audit features of Oracle. Or, when they do use them, they are so overwhelmed with choice, they turn on everything for good measure, then realise there is far too much output to read and digest so they quickly turn it all off again. It is quite common to use firewalls, intrusion detection systems (IDS) and other security tools to determine if the network or operating system is being misused or abused. So why not audit what users are doing to the "crown jewels" of an organization, the data. Oracle audit can help detect unauthorized access and internal abuse of the data held in the database.

* When should Oracle users be audited?

A simple basic set of audit actions should be active all the time. The ideal minimum is to capture user access, use of system privileges and changes to the database schema structure. This basic set will not show attempted access to specific data that shouldn't be accessed; however, it will give a reasonably simple overview of "incorrect" access and use of privileges. If an employee is suspected of inappropriate actions or if an attack has been suspected then more detailed audit can be turned on for specific tables. From a data management point of view, auditing data changes for all tables in the database is not really practical and could also affect performance. Monitoring data change access on critical tables (such as salaries in a HR database) should be considered.

* How can Oracle users be audited?

The standard audit commands allow all system privileges to be audited along with access at the object level to any table or view on the database for select, delete, insert or update. Audit can be run for either successful or unsuccessful attempts or both. It can be for each individual user or for all users and it can also be done at the session level or access level. At action level a single record is created per action and at session level one record is created for all audit actions per session.

* What are the performance and complexity issues?

Audit is generally perceived to be complex and slow. The reason for this is usually ignorance. If many or all options are turned on, then the resultant audit trail produced can be large and difficult to interpret and manage. Furthermore, if audit is used on all tables and views in the database, then this can have an effect on performance. Every time an action performed is auditable a record is written to the database; clearly the more audit is used, the more records will be written to the system tablespace purely for audit. In some cases double the amount of access to the database can be performed: the original write and the audit record being written.

The watchword here is simplicity and caution. Use only the audit that is needed to give an overall view of what is happening and for detailed monitoring of critical data and objects. The simpler the audit trail set-up, the more likely it is that the data will be analyzed and be of some use. It is important to define what actions or abuses are being checked for so that simple reports can be written to filter the audit trail for these actions. A default installation of Oracle has audit turned off by default and Oracle does not come with any standard default audit settings or reports to analyse any audit trail produced. These reasons, and the fact that there are many options available are, in my opinion, why audit is perceived to be complex.

The standard audit commands do not allow audit to be performed at row level. It is also not possible to audit the actions of privileged users such as SYS and "as sysdba" until Oracle 9iR2.

Oracles Audit Facilities

The task of auditing an Oracle database does not have to be limited only to the audit commands; other techniques can be employed as well. Here are some of the main methods that can be used to audit an Oracle database:

* Oracle audit

This is really the subject of this paper. All privileges that can be granted to a user or role within the database can be audited. This includes read, write and delete access on objects at the table level. For more detailed audit, the database triggers need to be employed.

* System triggers

These were introduced with Oracle 8 and allow the writing of database triggers that fire when system events take place. These include start- up and shutdown of the database, log-on and log-off attempts, and creation, altering and dropping of schema objects. With the aid of autonomous transactions, these allow a log to be written for the above system events.

* Update, delete, and insert triggers

This is the second line of defence in trying to understand users' actions at a more detailed row level. Database triggers need to be written to capture changes at the column and row level. It is possible to write complete rows of data before and after the change being made to a log table in the database. The use of this type of logging is very resource intensive, as many extra records are written and stored. The one failing with this method is that read access cannot be captured with normal database triggers.

* Fine-grained audit

Fine-grained audit solves the problem of capturing read access. This feature is also based on internal triggers that fire when any piece of SQL is parsed. This is very efficient, as the SQL is parsed once for audit and execution. The feature uses predicates that are defined and tested each time the relevant object is accessed. Fine-grained audit is managed by a PL/SQL package called DBMS_FGA. A PL/SQL procedure is executed every time a "match" is made with the predicate. This method allows the audit to be performed down to the row and column level and to also for read statements. Readers should be forewarned that use of this feature requires programming skills.

* System logs

Oracle generates many log files and many of them can provide useful information to assist in auditing the database. One good example is the alert log used by the database to record start-up and shutdown as well as any structural changes such as adding a datafile to the database.

This paper is going to explore only the standard built-in audit commands. The other options will be left for future articles.

Some Examples

Because of the myriad of possibilities, auditing an Oracle database can be a daunting task. In order to try and simplify the discussion of what can be done, we will discuss a couple of simple examples that we will explore and work through.

* Auditing database access

This is a fundamental check to find out who accesses the database, from where and when. Log-on failures can be captured as well as log- ons at strange (anomolous) times of the day.

* Auditing changes to the database structure

In a production database, no user should ever change the schema structure. DBAs should make changes for upgrades at specific times; any other changes should be regarded as suspicious. Watching for structural changes can turn up indicators of incorrect use of the database.

A third simple example that could have been employed here is to audit any use of system privileges. However, this example is left to the reader to explore.

The final group of audit commands that can be employed is to audit any data changes to objects themselves. Unfortunately, as the requirements are very application and installation specific, this is beyond the scope of this paper.

Audit within Oracle is broken into three areas: statement auditing such as CREATE TABLE or CREATE SESSION, privilege auditing such as ALTER USER, and object level auditing such as SELECT TABLE.

Basic Configuration

The audit trail can be either written to the database or to the operating system. Writing the audit trail to the operating system is, in some senses, more secure but the implementation is not available on all platforms and is platform specific. In this article we will concentrate on using the database to store the audit trail.

Audit is turned on for writing to the database by adding the following line to the init.ora file. A symbolic link to it can usually be found in $ORACLE_HOME/dbs

audit_trail = db

The database now needs to be restarted. A simple check will show that audit is indeed now turned on.

SQL> select name,value from v$parameter
2 where name like 'audit%';

------------------------------ ------------------------------
audit_trail DB
audit_file_dest ?/rdbms/audit


No audit actions are captured yet until audit actions are defined; that is, except for privileged access to the database, starting and stopping of the database, and structural changes such as adding a datafile. These are logged to operating system files in $ORACLE_HOME/rdbms/audit unless audit_file_dest is redefined in the init.ora file. On Windows these events appear in the Event Viewer. To check if any privilege or statement audit actions are enabled, do the following:

SQL> select * from dba_stmt_audit_opts
2 union
3 select * from dba_priv_audit_opts;

no rows selected


To find out what objects are being audited, query the view dba_obj_audit_opts.

The Worked Examples

Let us now work through our two example cases and see what can be learned. First, turn on audit for the access attempts to the database:

SQL> audit create session;

Audit succeeded.


The above command will capture access by all users by access and whether successful or unsuccessful. The default for this command is by access.

Note: The format of all audit commands from the Oracle documentation is as follows:

audit {statement_option|privilege_option} [by user] [by
{session|access}] [ whenever {successful|unsuccessful}]

Only the statement_option or privilege_option part is mandatory. The other clauses are optional and enabling them allows audit be more specific.

For a user to define audit statements, the privilege "AUDIT SYSTEM" needs to have been granted first. The users that have this privilege can be checked as follows:

SQL> select *
2 from dba_sys_privs
3 where privilege like '%AUDIT%';

------------------------------ ---------------------------------------- ---

9 rows selected.


The above results are for a 9i database, the default users MDSYS, CTXSYS and WKSYS would likely be good targets for attackers, as any audit actions could be turned off as one of these users to hide any actions undertaken.

Now that audit will capture all access attempts, we need to wait for some users to log in to do work. So while they do that, let's set up the audit to capture alterations to the schema. For the sake of brevity, in this example, not all schema object changes will be captured. Changes to tables, indexes, clusters, views, sequences, procedures, triggers, libraries and many more can be captured. In this example, audit will be enabled on an example set. Turning on the audit can be performed as a two-stage process, generate the audit commands and then run them as follows:

set head off
set feed off
set pages 0
spool aud.lis
select 'audit '||name||';'
from system_privilege_map
where (name like 'CREATE%TABLE%'
or name like 'CREATE%INDEX%'
or name like 'CREATE%CLUSTER%'
or name like 'CREATE%SEQUENCE%'
or name like 'CREATE%PROCEDURE%'
or name like 'CREATE%TRIGGER%'
or name like 'CREATE%LIBRARY%')
select 'audit '||name||';'
from system_privilege_map
where (name like 'ALTER%TABLE%'
or name like 'ALTER%INDEX%'
or name like 'ALTER%CLUSTER%'
or name like 'ALTER%SEQUENCE%'
or name like 'ALTER%PROCEDURE%'
or name like 'ALTER%TRIGGER%'
or name like 'ALTER%LIBRARY%')
select 'audit '||name||';'
from system_privilege_map
where (name like 'DROP%TABLE%'
or name like 'DROP%INDEX%'
or name like 'DROP%CLUSTER%'
or name like 'DROP%SEQUENCE%'
or name like 'DROP%PROCEDURE%'
or name like 'DROP%TRIGGER%'
or name like 'DROP%LIBRARY%')
select 'audit '||name||';'
from system_privilege_map
where (name like 'EXECUTE%INDEX%'
or name like 'EXECUTE%PROCEDURE%'
or name like 'EXECUTE%LIBRARY%')
spool off

This will generate a set of audit commands that can be captured to a spool file, which is then run to enable the audit commands.

Another solution would be to audit the actual permissions granted to users by generating the audit commands from the database view dba_sys_privs. While this may seem to be a better solution and potentially involve less audit commands, it would not allow for the case when new permissions are granted to users. In this case, audit would also need to be enabled at the time the privileges are granted.

Now that all of the sample audit is now enabled, the settings can be viewed with this SQL:

1 select audit_option,success,failure
2 from dba_stmt_audit_opts
3 union
4 select privilege,success,failure
5* from dba_priv_audit_opts
SQL> /

---------------------------------------- ---------- ----------

38 rows selected.


Every time a user attempts anything in the database where audit is enabled the Oracle kernel checks to see if an audit record should be created or updated (in the case or a session record) and generates the record in a table owned by the SYS user called AUD$. This table is, by default, located in the SYSTEM tablespace. This in itself can cause problems with potential denial of service attacks. If the SYSTEM tablespace fills up, the database will hang.

The AUD$ table is rare, as it is the only SYS owned table from which Oracle allows records to be deleted. If the audit trail is turned on and written to the database, then the numbers of records in this table need to be monitored carefully to ensure it doesn't grow too fast and fill the system tablespace. A purging strategy needs to be adopted to keep the size of the table in check and, if needed, to archive off audit trail records for future reference. One tactic could be to copy the records to summary tables that allow specific checks for abuse to be performed offline. These summary tables can be in a separate database for added security. Once copied, sys.aud$ can be truncated.

SYS.AUD$ can be moved to a different tablespace other than SYSTEM but check with Oracle support first, as this action is no longer supported.

Only users who have been granted specific access to SYS.AUD$ can access the table to read, alter or delete from it. This is usually just the user SYS or any user who has had permissions. There are two specific roles that allow access to SYS.AUD$ for select and delete, these are DELETE_CATALOG_ROLE and SELECT_CATALOG_ROLE. These roles should not be granted to general users.

Back to the examples, our users have been logging on and working throughout the day and created some audit records. These audit records can be viewed in a number of ways:

* By selecting from SYS.AUD$ - This is the raw audit trail
* By selecting from dba_audit_trail - This is a DBA view showing the raw audit trail.
* By selecting from dba_audit_session - This view shows just log-on and log-off actions.

A simple piece of SQL can show details of the connection attempts:

SQL> get check_create_session
1 --
2 -- check_create_session.sql
3 --
4 col username for a15
5 col terminal for a6
6 col timestamp for a15
7 col logoff_time for a15
8 col action_name for a8
9 col returncode for 9999
10 select username,
11 terminal,
12 action_name,
13 to_char(timestamp,'DDMMYYYY:HHMISS') timestamp,
14 to_char(logoff_time,'DDMMYYYY:HHMISS') logoff_time,
15 returncode
16* from dba_audit_session
SQL> /
--------------- ------ -------- --------------- --------------- ----------
SYS pts/1 LOGOFF 09042003:051046 09042003:051641 0
ZULIA pts/1 LOGON 09042003:051641 1017
SYS pts/1 LOGOFF 09042003:051649 09042003:053032 0
SYS pts/2 LOGOFF 09042003:052622 09042003:053408 0
ZULIA pts/1 LOGON 09042003:053032 1017

There are a number of simple abuses that can be checked for in the area of user access to the database. As examples for this paper we will look at the following:

* Failed log-on attempts

This can indicate fat fingers or attackers' attempts to gain unauthorized access the database. The following SQL highlights this:

SQL> select count(*),username,terminal,to_char(timestamp,'DD-MON-YYYY')
2 from dba_audit_session
3 where returncode<>0
4 group by username,terminal,to_char(timestamp,'DD-MON-YYYY');

---------- --------------- ------ -----------
1 BILL pts/3 09-APR-2003
3 FRED pts/3 09-APR-2003
4 ZULIA pts/1 09-APR-2003


This shows two possible abuses, the first is the user Zulia attempting to log on and failing four times on the same day. This could be a forgotten password or it could be someone trying to guess his or her password. A change to the SQL as follows gives a bit more detail:

SQL> select count(*),username,terminal,to_char(timestamp,'DD-MON-YYYY'),returncode
2 from dba_audit_session
3 group by username,terminal,to_char(timestamp,'DD-MON-YYYY'),returncode;

---------- --------------- ------ ----------- ----------
1 BILL pts/3 09-APR-2003 1017
1 EMIL pts/1 09-APR-2003 0
1 EMIL pts/2 09-APR-2003 0
1 EMIL pts/3 09-APR-2003 0
1 EMIL pts/4 09-APR-2003 0
3 FRED pts/3 09-APR-2003 1017
3 SYS pts/1 09-APR-2003 0
1 SYS pts/2 09-APR-2003 0
1 SYSTEM pts/5 09-APR-2003 0
4 ZULIA pts/1 09-APR-2003 1017
1 ZULIA pts/1 09-APR-2003 0

11 rows selected.


This reveals that the user successfully logged on on the same terminal on the same day. A number of failed log-ons should be agreed as part of these checks and the above SQL run every day. Those users with failure numbers above the threshold should be investigated.

* Attempts to access the database with non-existent users

One interesting extension to the above SQL is to find attempts to log in where the user doesn't exist. An audit record is still created in this case. The following SQL illustrates:

SQL> select username,terminal,to_char(timestamp,'DD-MON-YYYY HH24:MI:SS')
2 from dba_audit_session
3 where returncode<>0
4 and not exists (select 'x'
5 from dba_users
6 where dba_users.username=dba_audit_session.username)
SQL> /

--------------- ------ --------------------
FRED pts/3 09-APR-2003 17:31:47
FRED pts/3 09-APR-2003 17:32:02
FRED pts/3 09-APR-2003 17:32:15
BILL pts/3 09-APR-2003 17:33:01


This is probably abuse. All attempts to log on with a user that doesn't exist should be checked each day and investigated.

* Attempts to access the database at unusual hours

Checks should be made for any attempts to access the database outside of working hours. These accesses could be genuine overtime work or maintenance but they could just as easily be unauthorized access attempts and should be checked as follows:

SQL> select username,
2 terminal,
3 action_name,
4 returncode,
5 to_char(timestamp,'DD-MON-YYYY HH24:MI:SS'),
6 to_char(logoff_time,'DD-MON-YYYY HH24:MI:SS')
7 from dba_audit_session
8 where to_date(to_char(timestamp,'HH24:MI:SS'),'HH24:MI:SS') <
9 or to_date(to_char(timestamp,'HH24:MI:SS'),'HH24:MI:SS') >
SQL> /

---------- ------ -------- ---------- -------------------- --------------------
SYS pts/1 LOGOFF 0 09-APR-2003 20:10:46 09-APR-2003 20:16:41
SYSTEM pts/5 LOGOFF 0 09-APR-2003 21:49:20 09-APR-2003 21:49:50
ZULIA pts/5 LOGON 0 09-APR-2003 21:49:50
EMIL APOLLO LOGON 0 09-APR-2003 22:49:12


The above SQL shows any connections before 8:00 AM and after 7:30 PM. Any connections, particularly those made by privileged users such as SYS and SYSTEM, should be investigated. Particular attention can be made to the location from which the access was made. For instance, if privileged access is made from machines that are not in the administrator department, the administrator needs to find out why.

* Check for users sharing database accounts

The following SQL looks for users who are potentially sharing database accounts:

SQL> select count(distinct(terminal)),username
2 from dba_audit_session
3 having count(distinct(terminal))>1
4 group by username
SQL> /

------------------------- ----------

This shows that three users have accessed their accounts from more than one location. A further check could be to add a time component to see if they are accessed simultaneously and also to restrict the check per day. The above SQL gives some idea of the potential without complicating it too much. Again, these accounts and users should be investigated.

* Multiple access attempts for different users from the same terminal

The final example checks to find where multiple database accounts have been used from the same terminal. The SQL is again simple and could be extended to group by day and also to print out the users per terminal. This is a simple test to illustrate the abuse idea:

SQL> select count(distinct(username)),terminal
2 from dba_audit_session
3 having count(distinct(username))>1
4 group by terminal
SQL> /

------------------------- ------
3 pts/1
2 pts/2
3 pts/3
3 pts/5


This could indicate someone trying to gain access by trying many accounts and passwords, or it could indicate legitimate users sharing accounts for certain aspects of their work. In either case, the admin should investigate further.

There are, of course, many other scenarios that could indicate possible abuses. Checking for those is as simple as the cases depicted above. It will be left to the reader to experiment. Let me know what you find useful.

The second example case that audit actions were set for is to detect changes made to the database schema. This could include new objects being added or attempts to change existing objects within the database.

A simple piece of SQL will show any audit trail items that relate to objects being created or changed as follows:

col username for a8
col priv_used for a16
col obj_name for a22
col timestamp for a17
col returncode for 9999
select username,
to_char(timestamp,'DD-MON-YYYY HH24:MI') timestamp,
from dba_audit_trail
where priv_used is not null
and priv_used<>'CREATE SESSION'
SQL> @check_obj.sql


This simple example shows that the user ZULIA has created a table and the user PETE has been writing PL/SQL procedures. Any changes such as this that are found should be investigated in a production database. Many more specific abuses can be checked for in relation to object and schema changes but, in general, no user should be able to alter the database schema in a production database. As a result, the check can remain pretty simple.

Protecting the Database Against These Abuses

The two examples given are just two of many possible scenarios that could be detected using Oracle's auditing facilities. Turning on and managing audit is one of the first steps to securing the database. Using audit should be part of an overall organization security plan and policy that includes Oracle. The database should be audited regularly for misconfiguration or known vulnerabilities that could allow security breaches to take place.

Because of its complex nature and vast number of different ways it can be used and configured, the best approach to securing Oracle will always be to follow the principle of least privilege. Once the database is part of the overall security plan and is configured correctly and checked regularly, then auditing it should be considered an important part of the strategy.

In general, do not grant any privileges to general users in a production database, remove most of the PUBLIC privileges and delete or lock and change the passwords of any default accounts. Ensure that users obey password policies and that the password management features of Oracle are employed.

It is important that the audit actions are planned from a performance and usability point of view and that the audit trail is managed. It is also important that the audit trail data is understood in terms of detecting abuse.

The author's recent book by the SANS Institute "Oracle security step- by-step - A survival guide for Oracle security" gives excellent guidelines on how to configure Oracle securely.


Oracle's auditing features are very powerful and sometimes seem very complex. As we saw in the introduction, there is more than one option available for auditing an Oracle database. It is possible to audit almost everything in the Oracle RDBMS with the standard features but not at the row level. If a high-level audit is needed, use the standard features to get a view of overall activity and then home in on the area of concern in more detail.

Because it is possible to audit almost any type of action in an Oracle database using the standard audit features, the reader should experiment with the most useful audit actions for their organization. Keep it simple and do not try to use everything. Above all, predetermine what data will be generated in the audit trail and the abuses that can be checked for. Write reports to check the audit trail and purge it regularly. Finally, monitor the reports each day and take the appropriate action.

For more detailed auditing, use database triggers and fine grained auditing. Keep in mind that both of these methods need programming skills to implement and report on, so they should be considered carefully. A lot of useful information can be gathered without resorting to row-level audit. Above all, employ least privilege principle to avoid any users making changes or reading data that they should not.


APC said...

You don't actually commit the cardinal sin of passing off Pete Finnegan's work as your own. However, it is very bad manners to cut'n'paste an entire article written by somebody else and post it on your own blog. Particularly as you haven't prefaced it with an acknowledgment of Pete's expertise.

This is not the only offence on your blog. This article -
- is swiped wholesale from the ItToolboxWiki site. No doubt I could find other examples if I could be bothered.

Such behaviour is unacceptable. We are allowed to include selective quotations in an article of appreciation or criticism. But that's all. I suggest you familiarise yourself with the concept of Fair Use before you get a reputation for plagiarism.

Regards, APC

Anonymous said...


Tani said...

With this blog I have learned Simple Oracle Auditing. I also gain a conceptual understanding of the Oracle Auditing and how its components work and interact with one another. Thanks for sharing.

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ola shazly said...

الكثير من المواطنين بشكل يومي يعانون من مشكلات عديدة و هذه المشكلات تحتاج إلى خبراء ومتخصصين في هذه المجالات لحلها فعلى سبيل المثال مشكلة الحشرات و مشكله عزل الأسطح و مشكله التنظيف تحتاج إلى خبرة لكي يتم حل المشكلة على أكمل وجه ولكن لا داعي للبحث كثيراً، فقد جاءت شركة خدمات بجده لكي تقدم لعملائها الكرام في كافه أنحاء المملكة العربية السعودية خدمات كثيرة فهي تقدم خدمة نقل العفش وخدمات التنظيف بكافة أنواعها سواء كانت المنازل أو الفلل أو المكاتب و الخزانات وتقدم أيضاً الشركة خدمة العزل وتقدم أمهر السباكين وكهربائيين لحل كافة مشاكل العملاء لذلك بادر الآن بالاتصال.
شركة نقل عفش بجدة
شركة تنظيف بجدة
شركة مكافحة حشرات بجدة
شركة تنظيف خزانات بجدة
شركة تنظيف بالبخار بجدة
شركة عزل بجدة
شركة شراء اثاث مستعمل بجدة

ola shazly said...

كل شيء مع مرور الوقت يحتاج إلى صيانة وخاصة المنازل إن كل منزل يتطلب كل فترة تصليح وتجديد وصيانة لجميع ما قد تم إتلافه خلال الفترة السابقة، كل منزل يحتاج إلى الإصلاح بشكل دوري ولا يوجد منزل لا يتطلب أعمال صيانة باستمرار، ولكن الان مع شركة صيانة بجدة لن تحتاج إلى العمال الذين يقومون بتصليح الأشياء التي أتلفت لبضعة أيام فقط وسرعان ما ترجع إلى التلف مرة أخرى، ولأننا الأفضل في تقديم خدمات الصيانة سوف نقوم بتصليح أي شيء بكفاءة ومهارة عالية.

سباك بجدة
كهربائي بجدة
شركة تمديد الغاز المركزي بجدة

may nabil said...

شركة التفاؤل شركة نقل عفش بالدمام تقوم بعمل خطة متكاملة لـ نقل عفش بالدمام حيث تقوم بتجزئة عملية نقل العفش الى عدة خطوات كل منها مكملة للاخر لضمان السلامة التامة لكل المنقولات والممتلكات .
تتميز شركة التفاؤل شركة نقل اثاث بالدمام بفريق عمل متخصص ومميز يقوم بخدمات نقل العفش باعلى مستوى من الجودة والاتقان.
اقوى الخدمات بافضل الاسعار مع التفاؤل لـ نقل اثاث بالدمام
لا تقتصر خدمات شركة التفاؤل فى منطقة الدمام فحسب ولكن ايضا فى :

نقل اثاث
نقل الاثاث

شركة نقل اثاث بالدمام

شركة نقل اثاث بالقطيف

شركة نقل اثاث بالخبر

شركة نقل اثاث بالجبيل

Reda Shalaby said...

Home cleaning company in Mecca
the work of a house cleaning company in Mecca is not limited to the usual cleaning tools but we always keep up with the latest tools and devices.
For cleaning in order to offer our customers the best way to give them a clean house with the best and latest possibilities and the latest tools that are used in Golden House Company ِشركة تنظيف منازل بمكة:
Saku Steam cleaning and drying devices:
We use the urge to clean the body and steam boards from Saco and it is a way to get rid of the various forms and types of patches stuck in the mattresses and the rabbit because of the children get rid of the dirty in just a few minutes without scrubs or detergents that decimate the fabric of precious mattresses افضل شركة تنظيف بالبخار بمكة
Steam Brooms: Steam cleaners rely on the power of the heat to clean the carpet and carpet and sterilize it without water or cleaning materialsافضل-شركة-تنظيف-بالبخار-بمكة/شركة-تنظيف-منازل-بمكة-2/ 
Cleaning company in Makkah
Golden House Company to clean all types of reservoirs:
Golden House workers clean up all forms of reservoirs and the types of water tanks we clean: شركة تنظيف خزانات بمكة
Earth tanks:
a type of reservoir, which is placed in a hole that is not deep in the ground, requiring cleaning specialists to periodically clean it so that its water is not polluted.
• Upper reservoirs also need experienced labor because it is installed within a distance from the roof of the house so that the house is not exposed to water leaks and therefore workers cleaning company cabinets in Mecca the Golden House clean the top tank and clear it and then do a complete insulation of the reservoir structure from inside and out To ensure his safety and the safety of the house at once: شركة غسيل خزانات بمكة.
• We also clean up small family cabinets and separate apartments, to ensure permanent and periodic cleaning of your home tank, contact the Golden House numbers todayشركة-تنظيف-خزانات-بمكة/