Ransomware attack at Comparis resulted in data breach
Last Wednesday Comparis.ch, which has 80 million visits a year, was shut down by ransomware attackers demanding $400,000 (CHF370,000) in cryptocurrencies to put it back online. By Friday the website was operational again. A Comparis spokesman told SWI swissinfo.ch that no ransom had been paid.
The company initially said it believed that no customer data had been breached. However, on Wednesday, a week after the attack, Zurich cantonal police said detailed analyses had shown that the perpetrators of the attack had access to certain internal customer data belonging to Comparis.
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Further research reveals that Grief threat actors added Comparis to their leak site on July 12. The proof of claims archive contains 189 files consisting of a mix of old files and more recent ones.