It is thought someone gained access to the insurer’s systems using fake
or compromised credentials to steal customer data, including medical
information
Medibank has said hackers had contacted the company ‘negotiate’ over 200 gigabytes of customer data. Photograph: Bianca de Marchi/AAPA major cybersecurity incident has occurred at
Medibank Private just weeks after one-third of Australians had their
information held to ransom in the Optus data breach.
As
one of Australia’s biggest health insurance providers, Medibank holds
information that includes intimate medical records, making the breach
orders of magnitude more serious than the Optus hack.
There
was another data breach earlier this week of the online wine retailer
Vinomofo, which led to the records of 700,000 users being sold on a Russian-language cybercriminal forum.
In the wake of the Medibank breach, the
cybersecurity minister, Clare O’Neil, warned of a new world “under
relentless cyber-attack”, while Australia’s security agencies scrambled
to manage the fallout.
Here is what we know so far about the data breach.
What happened?
On 13 October, Medibank said
it had taken offline the data and policy systems of its budget
provider, ahm, and its international student division after a “cyber
incident”. The next day the company announced it had restored systems
and said it was “still responding” to the incident.
The
situation developed on Wednesday when Medibank disclosed to the
Australian stock exchange that hackers had contacted the company to
“negotiate” over the future of 200 gigabytes of customer data they said
had been stolen from company systems.
Although Medibank initially claimed there was “no evidence that customer data has been accessed”, the public learned the scale of the breach on Thursday as the Australian Signals Directorate and the Australian federal police started to investigate.
How did the attack occur?
Medibank
is understood to still be investigating but it is thought someone
gained access using fake or compromised user credentials.
What do we know about what was taken?
The
hacker shared a sample of 100 policies for verification. This
information contained names, addresses, dates of birth, Medicare
numbers, phone numbers and medical claims data – including information
about diagnoses, procedures and the location of medical services.
In
a statement the insurer said the hacker also claimed to hold credit
card information, but this has not been confirmed. The sample is
believed to come from ahm and contain information about international
students who were policyholders.
How many people does it affect?
Medibank has about 4 million customers but it is not known at this stage how many were caught in the breach.
Who is at risk?
So
far it has been confirmed international students have been affected,
since private health insurance is a requirement when they come to study
in Australia. This is concerning as many students have moved from
countries where their medical information could be used against them.
Anyone who holds a policy with Medibank should be on notice. Nine newspapers reported the hackers have threatened to release the information of the 1,000 most high-profile Australians if their demands are not met.
What does the company say?
Medibank’s chief executive David Koczkar has “unreservedly” apologised for the breach.
“I apologise and understand this latest distressing update will concern
our customers,” he said. “We have always said that we will prioritise
responding to this matter as transparently as possible.
“Our team has been working around the clock since
we first discovered the unusual activity on our systems, and we will not
stop doing that now. We will learn from this incident and will share
our learnings with others.”
What does the government say?
Speaking to the ABC on Thursday morning, O’Neil warned Australians of more attacks in the future.
“This
is the new world that we live in,” she said. “We are going to be under
relentless cyber-attack, essentially from here on in. And what it means
is that we need to do a lot better as a country to make sure that we are
doing everything we can within organisations to protect customer data,
and also for citizens to be doing everything that they can.”
O’Neil
said the Medibank and Optus breaches amounted to a “huge wake-up call”
that showed the need for an overhaul of information and privacy
protections.
What can you do if you’re affected?
It
is difficult for an individual person to respond to a data breach of
this size and scale. Criminals will typically use this information to
take out fake loans or use credit card information to make purchases. To
manage this risk people can contact Equifax for credit monitoring and
replace credit cards.
Other risks can be
managed by reviewing security settings on social media platforms,
closing old and unused accounts and being careful about what is posted.
This prevents criminals from gleaning contextual information.
Source:TheGuardian