Smb relay attack poc

1. What is SMB relay attack?
2. Which vulnerability does SMB Relay exploit?
3. Why is SMB so vulnerable?
4. What is Windows SMB vulnerability?
5. How is SMB exploited?
6. How does relay attack work?
7. How insecure is SMB?
8. Can a hacker still damage a network using SMB?
9. Is SMB 2.0 vulnerable?
10. What are the disadvantages of SMB?
11. What are the weaknesses of SMB?
12. Does ransomware use SMB?
13. What does SMB mean in cyber security?
14. What does the SMB do?
15. What is SMB Bruteforce?
16. What does SMB stand for in Cyber security?
17. What is SMB example?
18. Is SMB still used?

What is SMB relay attack?

SMB Relay Attack is a type of attack which relies on NTLM Version 2 authentication that is normally used in most companies. Unfortunately, when we are listening to what is going on in the network, we're able to capture a certain part of the traffic related to the authentication and also relay it to the other servers.

Which vulnerability does SMB Relay exploit?

The SMB Relay attack abuses the NTLM challenge-response protocol. Commonly, all SMB sessions used the NTML protocol for encryption and authentication purposes (i.e. NTLM over SMB).

Why is SMB so vulnerable?

Why is it a risk? Version 1.0 of SMB contains a bug that can be used to take over control of a remote computer. The US National Security Agency (NSA) developed an exploit (called “EternalBlue”) for this vulnerability which was subsequently leaked.

What is Windows SMB vulnerability?

The SMB vulnerability can let an unauthorized attacker to run any code as part of an application. According to the Microsoft advisory, “To exploit the vulnerability against an SMB Server, an unauthenticated attacker could send a specially crafted packet to a targeted SMBv3 Server.

How is SMB exploited?

Vulnerabilities may be exploited directly through exposed SMB ports, in conjunction with other vulnerabilities that enable an attacker to access internal SMB services, or through phishing attempts containing malware that targets SMB.

How does relay attack work?

How does a relay attack work? A relay attack usually involves two people working together. One stands by the targeted vehicle, while the other stands near the house with a device that can pick up a signal from the key fob. What's more, some devices can pick up a signal from over 100 metres away.

How insecure is SMB?

In modern applications, you should NOT use SMB v1 because it is insecure (no encryption, has been exploited in attacks like WannaCry and NotPetya) and inefficient (very “chatty” on networks creating congestion and reduced performance).

Can a hacker still damage a network using SMB?

SMBv1 has a number of vulnerabilities that allow for remote code execution on the target machine. Even though most of them have a patch available and SMBv1 is no longer installed by default as of Windows Server 2016, hackers are still exploiting this protocol to launch devastating attacks.

Is SMB 2.0 vulnerable?

The remote version of Windows contains a version of SMBv2 (Server Message Block) protocol that has several vulnerabilities. An attacker may exploit these flaws to elevate his privileges and gain control of the remote host.

What are the disadvantages of SMB?

There are some drawbacks to SMB. For example, it should not be used across the internet, but only on hosts connected to the LAN. This is due to the inherent insecurity of the way SMB authenticates. Although it is still apparent on a LAN, the attack surface is greatly reduced.

What are the weaknesses of SMB?

SMB share limitations include the following: NTFS alternate data streams are not supported. For example, named streams generated by a Mac OS X operating system cannot be stored directly. The encryption status of files cannot be queried or changed from SMB clients.

Does ransomware use SMB?

SMB vulnerabilities have been so successful for criminals that they've been used in some of the most devastating ransomware and Trojan attacks of the last two years.

What does SMB mean in cyber security?

What is the Server Message Block protocol? The Server Message Block protocol (SMB protocol) is a client-server communication protocol used for sharing access to files, printers, serial ports and other resources on a network. It can also carry transaction protocols for interprocess communication.

What does the SMB do?

The Server Message Block (SMB) protocol is a network file sharing protocol that allows applications on a computer to read and write to files and to request services from server programs in a computer network. The SMB protocol can be used on top of its TCP/IP protocol or other network protocols.

What is SMB Bruteforce?

Server message block (SMB) and common internet file system (CIFS) are network file sharing protocols most commonly used by Windows. Both can be vulnerable to brute force attacks. Once an attacker gains access to a user account they can access files, move laterally, or attempt to escalate privileges.

What does SMB stand for in Cyber security?

As a consequence, cyber criminals are looking for smaller, weaker targets — i.e. small to medium-sized businesses (SMB). In other words, cyber threats posed to small-to-medium-sized businesses (SMB) are real — and growing.

What is SMB example?

An SMB share, also known as an SMB file share, is simply a shared resource on an SMB server. Often, an SMB share is a directory, but it can be any shared resource. For example, network printers are often shared using SMB.

Is SMB still used?

The SMB protocol is one of the most popular protocols for file and resource sharing over networks. And not only with Windows—it has also been widely adopted by other operating systems, such as Linux/Unix and macOS.