The DBMS is the most widely used in the world, having several competitors of its own, such as MySQL, Oracle, MariaDB, among others.
In partnership with Sybase in 1988, SQL Server was created, initially to work as a complement to Windows NT. The years passed and the partnership ended in 1994, and Microsoft continued to develop and give performance to the program.
SQL Server is a programming language that works with relational database, your primary query language are the: Transact-SQL (T-SQL) and ANSI SQL, however they bring simplicity to the development of tables and make queries (queries) on what has been registered.
It works with an integrated encryption system, allowing only the administrator user to access information.
It works perfectly for login validation, user creations, products, sales, object listing. Putting each information as created in the delegated table, each in its list, ordered earlier in the creation.
SQL Server works perfectly for companies that have a large volume of information.
In SQL Server there are some types of tables, such as: Partitioned tables, temporary tables, system tables and wide tables. Let’s quickly explain each one:
Partitioned tables: These are those where the data is divided horizontally into units that can be separated by more than one group of database files. It exists to facilitate the management of large indexes, allowing subsets of the data to be managed quickly.
Temporary tables: These are stored in tempdb. There are two types of temporaries: local and global. They are differentiated by their visibility, example. The local ones in the first character of the name, have a single numerical sign (@), it is displayed in the current connection to the user connection, and after disconnecting from the SQL instance, the same numerical sign is deleted. Already the global, has two numbers (@@) as in the first character of the name, it is visible to any user after created, and only excluded after all the users that consult the table disconnect from the SQL instance.
System tables: It is the one that stores the information of the server that is allocated the SQL, common users can not update this table. Wide tables: This table uses the form of sparse columns, to increase the total number of columns that a table can have from 30,000. These “sparse columns” are optimized for null values, reducing space requirements for values that may cause overload.
SQL SERVER Encrypted by Ransomware
When ransomware invades SQL Server it encrypts the tables making it impossible to edit or export the data. All data becomes inaccessible to the company.
Ransomware can be inserted into the device or network by a malicious download, cracked programs or a brute force attack focused on the enterprise. Another form that is also widely used is access to remote access connections such as RDP, which gives the criminals full control of the machine.
Before initiating encryption the ransomware moves laterally within the company’s system, seeking privileged access and, most importantly, online backups.
After the files are encrypted a file is left on the desktop with all the information on how to contact the group. The group will stipulate the ransom amount and a time limit for the victim to contact them. There are ransomware groups that apply “double extortion” which consists of locking the system by encryption and extracting sensitive files for the company, files that will be leaked if the ransom is not paid. This puts the company in a delicate position.
Recover SQL Server Encrypted by Ransomware
We at Digital Recovery have been working on highly complex data loss cases for years, with this we specialise in the recovery of files encrypted by ransomware.
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All our processes are compliant with the General Data Protection Regulation (GDPR) and we make available to our clients the confidentiality agreement (NDA), the whole process is highly confidential.
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