From: InfoSec News (alertsinfosecnews.org)
Date: Wed Jan 21 2009 - 00:29:30 CST

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http://www.zdnet.com.au/news/communications/soa/VoIP-hackers-strike-Perth-business/0,130061791,339294515,00.htm

By Suzanne Tindal
ZDNet.com.au
21 January 2009

A hacker recently obtained unauthorised access to the IP telephony
(VoIP) system of a Perth business, making 11,000 calls costing over
$120,000, according to the Western Australian police.

The calls were made over a period of 46 hours, the police said, and the
business only became aware of the imposition when it received an invoice
from its service provider.

Thieves have always targeted PBX systems by finding numbers used for
remote calling — for mobile employees or those requiring international
call access outside of business hours — to make calls at the company's
expense.

This has in the past been exploited for uses such as routing calls made
on cheap international phone cards, according to Pure Hacking senior
security consultant Chris Gatford.

However, police said they were more concerned with the increasing number
of occurrences such as that in Perth where the thieves gained access to
users' VoIP network. They have issued a warning to small businesses to
ramp up their VoIP security.

[...]

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