![]() Nothing prevents them from trying the same method on other machines from within the organization Let’s say the attacker got lucky and was able to compromise one of your machines using RDP brute-force attack, or gained access to your corporate network using a convincing phishing lure. ![]() When resources are not exposed the attacker cannot reach the application as the surface attack is eliminated. If any resource is exposed to the Internet, the attacker can access it and execute a brute-force attack. Let’s delve into the ideal conditions that make brute force attacks possible, and why attackers consider them valuable. Will that trivial method ever go out of fashion? No, I don’t believe it will, and for a very good reason, the successful rate of these kind of attacks is 1:1000 According to the Microsoft RDP brute-force attacks study, around 0.08% of RDP brute-force attacks are successful, and RDP brute-force attacks last 2-3 days on average. When the number of failed logins is low, it’s challenging to spot the attack for the alert systems. Horizontal or Diagonal Brute Force attacks are much harder to detect, since the attackers can try one username/password pair at a time for a few times only. Diagonal Attack: the most efficient attack is applying both horizontal and vertical methods, where attacker shifts both username and password at each try.Vertical Attack: the attacker can apply his whole power to compromise the one legitimate user. ![]() Horizontal Attack: the attacker might try to compromise the accounts of multiple users across the organization. ![]() The options they can use include horizontal, vertical and diagonal attacks: A Brute-force attack is pretty intuitive: the attacker intentionally has to try the whole set of possible combinations, until he finds the correct one.
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