How to crack a mailbox password

The computer is not very familiar with the best friend or not to crack someone else's password, although it can be cracked, but it is not a good job. Generally for some hackers is certainly not very troublesome, but the layman's words that is not good. So how does a hacker steal a password?

1, the mail server System vulnerability to steal information

First they are exploiting the vulnerabilities of the mail service operating system. For Windows servers and LINXC servers. The Windows Server uses the Exchange Mail Server Enterprise Right-key system, which has not been set up for security. All members of the hacker to directly use the Terminal Server and the noon Input method vulnerability to obtain user administrator permissions. Then use Pwdump3 password cracking tool to export the hash password, and then use the L0phtCrack software to crack the password, if the user's mailbox password set simple, not a long time can be cracked.

In the case of Linux and UNIX servers, the SendMail mail system is generally used. After the hacker obtains the control power to the computer, the software such as John can break out the password from/etc/passwd or/etc/shadow. If you use a database to save user information and passwords, you can also guide their password information out.

2, in the mail transmission process to steal information.

First installs the sniffer software, sniffer is one kind of network analysis method based on the passive interception principle. Using this technique, you can monitor the state of your network, the flow of data, and the information that is transmitted over the network. Then run the software setting to specify that you listen for packets sent on the external server port 110 and then collect the information on the top of the packet by looking at the user name and the corresponding password by viewing the string after user and pass.