Crackmapexec hacktricks

1. What is port 445 exploit?
2. What uses SMB?
3. What port is SMB?
4. Can you exploit port 443?
5. What is port 445 vs 139?
6. Is SMB an exploit?
7. Is SMB a security risk?
8. Is SMB faster than FTP?
9. Is port 445 a vulnerability?
10. What is TCP 464 used for?
11. Is SMB faster than NFS?
12. Is port 445 a vulnerability?
13. What is an SMB exploit?
14. Should I disable port 445?
15. What happens if I disable port 445?
16. What is TCP 445 used for?
17. Is port 443 unsecure?
18. Why port 445 is blocked?

What is port 445 exploit?

Port 445 is a Microsoft networking port which is also linked to the NetBIOS service present in earlier versions of Microsoft Operating Systems. It runs Server Message Block (SMB), which allows systems of the same network to share files and printers over TCP/IP. This port shouldn't be opened for external network.

What uses SMB?

Over the years, SMB has been used primarily to connect Windows computers, although most other systems -- such as Linux and macOS -- also include client components for connecting to SMB resources. A group at IBM developed the SMB protocol in the 1980s.

What port is SMB?

SMB is a network file sharing protocol that requires an open port on a computer or server to communicate with other systems. SMB ports are generally port numbers 139 and 445. Port 139 is used by SMB dialects that communicate over NetBIOS.

Can you exploit port 443?

Ports 80, 443, 8080 and 8443 (HTTP and HTTPS)

HTTP and HTTPS are the hottest protocols on the internet, so they're often targeted by attackers. They're especially vulnerable to cross-site scripting, SQL injections, cross-site request forgeries and DDoS attacks.

What is port 445 vs 139?

Port 139: SMB originally ran on top of NetBIOS using port 139. NetBIOS is an older transport layer that allows Windows computers to talk to each other on the same network. Port 445: Later versions of SMB (after Windows 2000) began to use port 445 on top of a TCP stack. Using TCP allows SMB to work over the internet.

Is SMB an exploit?

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.

Is SMB a security risk?

Leaving an SMB service open to the public can give attackers the ability to access data on your clients' internal network, and increases their risk of a ransomware attack or other exploit.

Is SMB faster than FTP?

FTP is extremely fast and efficient compared to SMB when transferring large files. It can be difficult when it comes to small files, but overall, the speed of the FTP file transferring protocol is better. The use of short messages in SMB makes it sensible to network latency, which can decrease the speed.

Is port 445 a vulnerability?

Ports 139 and 445 are used for 'NetBIOS' communication between two Windows 2000 hosts. In the case of port 445 an attacker may use this to perform NetBIOS attacks as it would on port 139. Impact: All NetBIOS attacks are possible on this host.

What is TCP 464 used for?

Ports 88 and 464 are the standard ports for Kerberos authentication. These ports are configurable. Port 464 is only required for password change operations. Ports 88 and 464 can use either the TCP or UDP protocol depending on the packet size and your Kerberos configuration, see Section 2.2.

Is SMB faster than NFS?

NFS has no fast file find; SMB has fast find. NFS no server and printer browsing, while SMB has server and printer browsing. NFS slower reads and writes; SMB faster. NFS better with small files, while SMB fine with small files but better with large files.

Is port 445 a vulnerability?

Ports 139 and 445 are used for 'NetBIOS' communication between two Windows 2000 hosts. In the case of port 445 an attacker may use this to perform NetBIOS attacks as it would on port 139. Impact: All NetBIOS attacks are possible on this host.

What is an SMB exploit?

This vulnerability allows an attacker to execute code on the target system, making it a serious risk to affected systems that have not been patched. Between older systems that are either unpatched or unable to receive further security patches and newer vulnerabilities being found, SMB is a viable target for attackers.

Should I disable port 445?

We also recommend blocking port 445 on internal firewalls to segment your network – this will prevent internal spreading of the ransomware. Note that blocking TCP 445 will prevent file and printer sharing – if this is required for business, you may need to leave the port open on some internal firewalls.

What happens if I disable port 445?

Blocking TCP 445 will prevent file and printer sharing and also other services such as DHCP (dynamic host configuration protocol) which is frequently used for automatically obtaining an IP address from the DHCP servers used by many corporations and ISPs(Internet Service Providers) will stop functioning.

What is TCP 445 used for?

Port 445 is a traditional Microsoft networking port with tie-ins to the original NetBIOS service found in earlier versions of Windows OSes. Today, port 445 is used by Microsoft Directory Services for Active Directory (AD) and for the Server Message Block (SMB) protocol over TCP/IP.

Is port 443 unsecure?

HTTPS is secure and is on port 443, while HTTP is unsecured and available on port 80. Information that travels on the port 443 is encrypted using Secure Sockets Layer (SSL) or its new version, Transport Layer Security (TLS) and hence safer.

Why port 445 is blocked?

This issue occurs because the Adylkuzz malware that leverages the same SMBv1 vulnerability as Wannacrypt adds an IPSec policy that's named NETBC that blocks incoming traffic on the SMB server that's using TCP port 445.