If we are to be prepared in future we need to learn from history

1. A Cecile Park Media Publication | December 2017 15
BREACH RESPONSE
The NAO investigation
into WannaCry
Dan Hyde Partner
Dan.Hyde@penningtons.co.uk
Penningtons.Manches LLP
The Breach
Friday 12 May 2017 was a ‘Black Friday’
in the truest sense of the phrase;
not a day of panic in trying to grab a
bargain in discounted sales, but a day
that witnessed a global ransomware
attack now known as WannaCry. The
attack was random and whilst one of
the major victims was our NHS, it was
certainly not targeted. The cyber attack
affected some 100 countries and an
excess of 200,000 computers. The
exact numbers and full extent will never
be known. Perhaps more surprisingly,
the cost to the NHS will also not be
known, as despite investigation by the
DoH and the Report from the NAO,
we are informed that the cost is not
calculable; much of the data as to the
full impact of the attack is seemingly lost
or unavailable. If this is true, there are
shoddy systems in place at the NHS.
There were certainly shoddy systems
in terms of IT and cyber security. For
a start the infection by the WannaCry
ransomware was entirely avoidable.
Every single NHS organisation that was
infected by WannaCry had unpatched
or unsupported Windows operating
systems that enabled virus infection.
Significantly, in March 2017 Microsoft
had issued updates that NHS Trusts
using Windows 7 could have adopted
to protect themselves. Further, on 17
March 2017, NHS Digital had issued a
CareCERT asking NHS Trusts to apply
the Microsoft update. If the DoH’s
figures are to be relied upon, more
than 90% of the devices in the NHS
are operating on Windows 7, so 90%
of those devices would have been
protected if they had been patched in
line with the NHS Digital request. Trusts
running older Windows XP operating
systems on devices had been expressly
notified that they were to migrate away
from their use, yet when the attack
came on 12 May 2017, approximately
5% of the NHS was still reliant on an
outdated Windows XP operating system.
Windows XP can however be patched,
and following the attack Microsoft
issued an XP update that would have
prevented the ransomware infection.
This non-targeted ransomware attack
was spread via the internet and caught
the NHS which was exposed due to its
unpatched Windows systems. Even this
The National Audit Office (‘NAO’) published a full report entitled ‘Investigation: WannaCry
cyber attack and the NHS’ (the ‘Report’) on 27 October 2017, which looked to investigate the
context, causes and result of the international ransomware attack WannaCry on the NHS.
Dan Hyde, Partner at Penningtons Manches, discusses the findings of the Report and the
lessons the NHS and the Department of Health (‘DoH’) have learned from WannaCry.
Image:tzahiV/iStock/GettyImagesPlus

2. CYBER SECURITY PRACTITIONER16
exposure would not have been fatal had
effective firewalls been in place to repel
the threat, but there was no such line of
defence because firewalls had not been
maintained so that even this basic shield
was missing. Prior to this ‘Black Friday,’
the NHS had no joined up cyber security
and a culture of woeful non-compliance;
as on 12 May 2017 only 88 out of 236
NHS Trusts had been subject to a cyber
security inspection by NHS Digital. Of
the 88 inspected not a single Trust
passed. The inspections were voluntary
and CareCERTs requesting updates and
other basic cyber security measures
were treated as being voluntary and
largely ignored. The NHS Trusts were
silos and the DoH had no knowledge as
to which had complied with the requests.
The DoH was itself unprepared; it was
warned a year before the attack that
it was at risk, yet did not provide any
written report in response until two
months after the attack in July 2017.
The Breach Response
So what happened after
the initial breach?
Sadly the NHS had no proper breach
response plan or, if it did, it did not
have one worth having. History tells us
that one of the key features of a cyber
attack is the communication blackout
that follows. It was Maersk’s lack of
preparedness for this that caused
such bewilderment and the same
was true of the NHS. The very first
hurdle, the loss of key communication
systems, was not properly prepared
for and staff were left scrabbling for
personal mobiles in order to try and
send WhatsApp messages, subject to
the contact being within their personal
contact list. Roles, responsibilities and
reporting lines were not properly defined
with the result that emergency calls
were made to various local, national
agencies and emergency services
in the uncoordinated disorganised
panic that followed the attack.
It is arguably better not to have any
breach response plan than one that is
merely a box ticking exercise that leads,
as here, to complacency and increased
confusion when the attack hits. Incident
response plans should be tested in a
realistic way - there needs to be a drill
where systems are not available for use
and staff become familiar with who and
how they make contact, and a step-
by-step means of limiting damage and
restoring and recovering systems.
In conclusion, they had a woefully
inadequate breach response plan,
which arguably wasn’t a plan at all, but
rather an unpractised and ineffective
hypothetical policy that none of the key
personnel were sufficiently familiar with.
The recovery was aided by a cyber
security researcher who activated a kill
switch; his action prevented WannaCry
locking out further systems and devices.
That was by luck or intuition rather than
design as it was not in pursuit of any
implemented national cyber security
policy; NHS England’s IT Department
did not even have on-call emergency
facilities in place so there was a reliance
on IT staff attending work voluntarily to
assist in firefighting. The National Cyber
Security Centre and National Crime
Agency also pitched in, assisting the NHS
and other affected organisations - it is
unclear just how much worse the lines of
communication and impact might have
been but for that external assistance.
Lessons learned?
The disjointed structure of the NHS
gives little cause for hope. The DoH has
overall responsibility for cyber security
but this is delegated down to a myriad
of NHS Trusts, GPs and social care
providers. History tells us that these
organisations do not all march in step and
have previously failed to heed warnings
or requests. The NHS has now declared
‘the need to improve the protection
from future cyber attacks’ - but how will
it actually implement such a statement
of intent when it comprises silos that
are seemingly ungovernable? It sets out
a number of key measures, namely:
• To develop a response plan.
• To ensure ‘critical’ CareCERT
alerts are implemented.
• To ensure essential communications
get through during an incident
when systems are down.
• To ensure organisations, staff and
boards take the threat of cyber
attack seriously, work proactively
to maximise resilience and reduce
the impact on patient care.
This all sounds rather trite. The NAO
Report found a cyber breach response
plan had already been developed on
12 May when the attack hit. It was not
the absence of a plan, but rather the
inability to put any plan into practice
that was at the heart of the failure.
That can only be taught through
cyber drills that replicate the loss of
communication and key system support.
There needs to be a scheme of
regulation and a compliance regime with
teeth to ensure that there are routine
checks and sanctions for those who
fail to adhere to CareCERTS. In terms
of practical steps, the DoH should be
setting a minimum number of drill targets,
rather like fire drills backed by mandatory
inspections by NHS Digital or an
external inspector; if an organisation fails
inspection there should be immediate
action to remedy and a follow up test.
I have no doubt that the NHS and its
constituent parts will take cyber attacks
more seriously going forward, but
deeds not words are required. I remain
unconvinced that this will happen.
BREACH RESPONSE
continued
Sadly the NHS had no proper breach response plan or, if it did, it did
not have one worth having. History tells us that one of the key features
of a cyber attack is the communication blackout that follows.