SMB Signing Attack
SMB signing is a security feature of the Server Message Block (SMB) protocol, which is used to share files, printers and other resources between computers. It is designed to prevent man-in-the-middle attacks, in which an attacker intercepts communication between two parties and modifies it without their knowledge.
An SMB signing attack occurs when an attacker uses a technique called reflection to modify network packets exchanged between a client and a server. The attacker is able to intercept and modify these packets because they are not signed or encrypted, allowing them to inject malicious code or modified instructions into the communication stream.
This type of attack can be used to gain unauthorized access to confidential information, such as usernames and passwords, or to inject malware into the victim’s network. It is therefore important for organizations to implement SMB signing to protect against this type of attack.
To protect against SMB signing attacks, network administrators should enable SMB signing on all Windows-based servers and clients. This can be done through Group Policy or by modifying registry settings. Additionally, it is recommended to use strong passwords and multi-factor authentication to further protect against unauthorized access.