Over the past 12 months Sedcom has been actively closing any system
vulnerabilities to hackers from mostly African countries. In the past 6
months we have seen an increase in successful and unsuccessful attempts
at toll fraud.
How they do it? Hackers will call you business generally after hours when
the calls go through to the voicemail system at this point a robot will
try to access the mailbox remotely using the default password. If they
can gain access to a mailbox they can set it up do dial international
numbers that will either forward calls through or call 1900 equivalent
overseas numbers that charge you a large connection fee.
How can you protect yourself from attack?
Make sure all users change their voicemail passwords from the default
1111 to something else. Block international dialling from any extension
or user who does not need it and keep the system software up to date.
If you have not had your phone system services in the past 12 months i
would recommend you get Sedcom to come out and block any potential remote
access for hackers in your system and do a software upgrade at the same