The DBMS is the most widely used in the world, with several competitors to match, such as MySQL, Oracle, MariaDB, and 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 databases, its primary query languages are: Transact-SQL (T-SQL) and ANSI SQL, however they bring simplicity to developing tables and making queries on what has been registered.
It works with a built-in encryption system, allowing only the administrator user to access the information.
It works perfectly for login validation, user creations, products, sales, object listing. Putting each information as created in the delegated table, each one in its list, ordered previously in the creation.
SQL Server works perfectly for companies that have a large volume of information.
In SQL Server there are a few types of tables, such as: Partitioned tables, temporary tables, system tables and wide tables. Let’s quickly explain each one:
Partitioned tables: These are 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. The global one has two numbers (@@) as in the first character of the name, it is visible to any user after created, and deleted only after all users that consult the table disconnect from the SQL instance.
System tables: This is the table that stores the information from the server that SQL is allocated to, regular users cannot update this table. Wide tables: This table uses the form of sparse columns, to increase the total number of columns a table can have from 30,000. These “sparse columns” are optimized for null values, reducing the space requirements for values that might cause overloading.
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 company. 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, looking for privileged access and especially 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 amount of the ransom 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
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