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An overview of the effectiveness of a brute force attack on account takeover

  • The number of U;
  • The british empire was a global instead of the indian nationalist account of the british as alien aggressors, seizing power by brute force and;
  • To reverse hashed passwords, cybercriminals simply run the same hashing algorithm against a cracking dictionary;
  • The output is called a rainbow table, a precomputed table of the clear text value and the associated hash.

Have you ever wondered how they do it? Denial of Service Attack What is it? The goal and result of a successful DDoS attack is the websites on the target server are unavailable to legitimate traffic requests. How does it work? The logistics of a DDoS attack may be best explained by an example.

The result is that legitimate customer calls i. So in essence Company X is potentially losing business due to the legitimate requests being unable to get through. A DDoS attack on a web server works exactly the same way.

An overview of the effectiveness of a brute force attack on account takeover

Because there is virtually no way to know what traffic is sourced from legitimate requests vs. While this principle certainly will work when it comes to attacking a web server, it becomes significantly easier when zombie computers, instead of actual manned computers, are utilized.

So with a single update to the home location of the respective malware, a single attacker can instantly coordinate hundreds of thousands of compromised computers to perform a massive DDoS attack. The result of a successful attack can range from impersonating a user account to a complete compromise of the respective database or server.

If there is no match, no UserID is returned so the login credentials are invalid. While a particular implementation may differ, the mechanics are pretty standard.

Using simple substitution in our template query, we would get this: This is the begin comment token for SQL statements, so anything appearing after the two dashes inclusive will be ignored. Essentially, the above query is executed by the database as: This act of manipulating the query to produce unintended results is a SQL injection attack. What damage can be done? A SQL injection attack is caused by negligent and irresponsible application coding and is completely preventable which we will cover in a momenthowever the extent of the damage which can be done depends on the database setup.

In order for a web application to communicate with the backend database, the application must supply a login to the database note, this is different than a user login to the web site itself. It is important to note that some web applications could need this type of permission so it is not automatically a bad thing that full control is granted.

After simple substitution the authentication query becomes: Which gets executed by the database as: Of course, much worse can be done as, depending the SQL permissions allowed, the attacker can change values, dump tables or the entire database itself to a text file, create new login accounts or even hijack the entire database installation.

PasswordPing

One of the cardinal rules of web development is you never blindly trust user input as we did when we performed simple substitution in our template query above. An SQLI attack is easily thwarted by what is called sanitizing or escaping your inputs. This simple act of sanitation pretty much prevents an SQLI attack. Additionally, because the dashes are included within the string value and not the SQL statement itself, they will be considered part of the target value instead of being interpreted as a SQL comment.

However, the damage which can be done by these types of attacks can range anywhere from an inconvenience to catastrophic depending on the precautions taken.