“Going full ninja” is becoming a major nuisance for SMBs. Companies on the rise tend to put cybersecurity on hold – huge mistake! From ransomware to your run-of-the-mill phishing email, everything’s set out to get you. It’s not paranoia – just stating the obvious. So, what’s this about going, full ninja?
Well, it has something to do with today’s topic – the SMB relay attack. Sounds fancy, but truth be told, anyone with access to Kali and some basic Metasploit skills can orchestrate this type of cyberattack.
Is it an article-worthy subject do? I believe it is. You see, SMB relay attacks do work and they can be devastating. MITMs (Man-in-the-Middle attacks) are never good news. But that’s a story for another time. Let’s talk about SMB Relay attacks.
What is an SMB?
No, it’s not the acronym for Small to Medium-Sized Business or Super Mario Brothers. It stands for Server Message Block, a network file-sharing protocol that operates on the Application and Presentation Layers, but heavily reliant on lower-level protocols (i.e. TCP/IP and NetBIOS).
The SMB protocol allows a client (i.e. your machine) to communicate with a server and, by extension, with the other network-based resources. It’s also called a serverclient protocol. SMB governs everything from internetwork file-sharing to doc-editing on a remote machine.
Even the “out of paper” alert you receive on your computer when trying to print a document is the work of the SMB protocol.
The Server Message Block uses TCP port 445 for connection and, of course, data transmission. If the resource requested is located on the web, the address resolution is handled through the DNS.
For smaller networks, the address resolution mantled is passed to ..
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