As an IT student studying networks and cybersecurity here in Poltava, I spend a lot of time reading about complex vulnerabilities and advanced malware. But sometimes the most effective attacks are surprisingly simple. I recently came across an excellent series of articles on the Null Void Security blog. The author wrote three detailed guides covering subscription bombing, SMS flooding, and phone call attacks. Reading through them gave me a totally new perspective on how everyday internet infrastructure can be weaponized against us.
The core concept behind all three of these attacks is resource exhaustion, but the target is the human user rather than a server. In a subscription bombing attack, a malicious script takes your email address and submits it to thousands of unsecured signup forms across the web. Within minutes, your inbox is completely paralyzed by welcome emails and newsletter confirmation requests. The SMS and phone call versions work the exact same way. Attackers exploit poorly designed application programming interfaces that trigger automated verification texts or sales calls, completely drowning your device in continuous notifications.
What I found most interesting about the Null Void Security posts is the explanation of the actual motive behind these attacks. It is very easy to assume someone is just playing a cruel prank. However, these floods of digital noise are usually a deliberate smokescreen. If a hacker manages to compromise your bank account, they know the bank will automatically send you an alert when they try to transfer money. By launching an email or SMS bomb at the exact same time, they bury that critical security warning under a mountain of junk. You are so busy trying to clean up the mess that you do not realize your money is being stolen until it is far too late.
From a developer standpoint, this is a huge lesson in application security. These attacks only succeed because companies leave their web forms and communication gateways completely unprotected. When we build websites in my IT classes, we focus a lot on making the user experience as frictionless as possible. But if you do not implement basic security controls like rate limiting or invisible honeypots, your website can easily be used as a tool for harassment. The articles stress that implementing strict double opt in rules for emails and adding behavioral verification checks for text messages would practically eliminate this entire category of cyberattacks.
The articles also provide some solid advice on what to do if you ever find yourself targeted. The worst thing you can do is panic. If your inbox is suddenly flooded, you should avoid mass deleting everything because you might accidentally erase the exact fraud alert the attacker is trying to hide. Instead, you should use the search function to look for keywords like purchase, login, or transfer. For phone and SMS attacks, the author recommends using your mobile operating system settings to temporarily silence unknown callers. This gives you the quiet space you need to check your financial accounts from a secure computer and lock down your passwords.
Learning about these tactics is a great reminder that cybersecurity is not just about defending against direct database breaches. We also have to think critically about how legitimate systems and normal notification features can be abused at scale.