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The maker of the pop optimization app CCleaner has confirmed hackers stole a trove of personal information about its paid customers following a datum severance in May .

In anemail send to customers , Gen Digital , the transnational software companionship that have CCleaner , Avast , NortonLifeLock and Avira brands , articulate that the cyber-terrorist tap a exposure in the widely used MOVEit file transfer tool , which is used by thousands of organizations , including CCleaner , to move large sets of sore data over the internet .

The email to client said that the hacker take names , contact info and entropy about the products that were purchase .

Jess Monney , a spokesperson for Gen Digital , confirmed that customer speech sound numbers , electronic mail addresses and billing address were affect by the breach . Monney said that less than 2 % of user were affected , but decline to cater a specific number of affected user .

CCleaner is used by trillion of people around the world . Gen Digital does not burst down how many paid CCLeaner users it has , but arrogate to haveabout 65 million pay up customersacross its cybersecurity portfolio , which include CCleaner .

It ’s not clear why it took CCleaner several calendar month to disclose the incident to affected customers .

Themass - hacking of MOVEit file conveyance toolsbegan in May , and quickly became the biggest hack of the year ( so far ) by the act of victims alone . The never - before - seen vulnerability grant the notorious Clop ransomware to steal tender data point from thousands of organizations that stash away datum on these internet - connected system of rules . Researcherstracking the mass - hackssay more than 2,500 organizations have confirm MOVEit - related information breaches since May , amounting to at least 66 million individuals — though , the true routine of affected people is likely far higher .

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Clop has not yet listed CCleaner on its dark web leak situation , which ransomware gangs use to extort fellowship by bring out steal Indian file if the hacker ’ ransom money is not paid .

An early listing for NortonLifeLock — another Gen Digital stigma — was listed on August 14 . A spokesperson for Gen Digital saidat the timethat the incident was limited to the personal data of its employee and contractile organ , and that “ no client or collaborator data point has been exposed . ”

In 2017 , CCleaner was compromise by hackers who plant malware in the software to sleuth onmore than two million users . The peter Lord say that the hackersspecifically targetedhigh - profile tech company and telecom colossus .