Companies of all sized based in Nottinghamshire are currently experiencing an increased level of fraud following compromise of their Private Branch Exchange (PBX) systems.
A company’s PBX is the telephone system that allows a company to switches calls between phones on local lines while allowing all users to share a certain number of external phone lines. PBX or dial- through fraud occurs when hackers target these systems from the outside and use them to make a lot of calls to premium rate or overseas numbers to generate a financial return leaving the company in question with a substantial phone bill.
Once access is gained, the criminals can exploit in-built services such as message forwarding and call diversion and can make calls on the organisation’s account to premium rate numbers or international numbers
Businesses of all sizes can be targeted, but nationally there has also been an increase in schools, charities and medical/dental practices being targeted. Victims can lose tens of thousands of pounds and are likely to be targeted again once a vulnerability in their system has been found. This type of fraud is most likely to occur when a business is closed but their telephone systems are NOT, for example in the early hours of the morning or over a weekend or public holiday.
The good news is that some simple steps will significantly reduce your risk of victimisation:
Speak to your maintenance provider to understand the threats and ask them to correct any identified security defects
If you would like any further help or advice on preventing cyber-crime and fraud please call Nottinghamshire Police on 101 or get regularly updated advice by visiting www.nottinghamshire.police.uk/advice and http://www.actionfraud.police.uk/ of following @NottsFraudCops on Twitter