Offers to provide random files as means of verification
Applications and devices need to be stopped from doing what they have no business doing
Hardenhuish School in Wiltshire says it hopes at least some systems will be back online next week
'Money Message' claims to have stolen 1.5 TB of data
Most of the leaked data is made up of technical program files and administrative business data, according to Royal Mail
Attack earlier this month forced the temporary closure of production plants in North America
Attack is causing delays in responses to non-emergencies
Group is still trying to monetise the attack