An organisation called Marketo is selling data from Fujitsu on the dark web, although the firm claims the information "appears to be tied to customers" rather than their own systems. Marketo announced on its leak site on August 26 that it had 4 GB of stolen data and was selling it. They claimed to have private customer information, company data, budget data, reports, and other company papers, including project information, and gave samples of the data.

Fujitsu Limited, based in Tokyo, is a Japanese multinational information and communications technology equipment and services firm founded in 1935. After IBM, Accenture, and AWS, Fujitsu was the world's fourth-largest IT services company by yearly sales in 2018. Fujitsu's hardware portfolio consists mostly of personal and enterprise computing solutions, such as x86, SPARC, and mainframe compatible servers. 

Initially, the group's leak site stated that there were 280 bids on the data, but now it only shows 70 offers. A Fujitsu representative downplayed the event, saying there was no evidence it was linked to a case in May in which hackers used Fujitsu's ProjectWEB platform to steal data from Japanese government agencies. 

"We are aware that information has been uploaded to dark web auction site 'Marketo' that purports to have been obtained from our site. Details of the source of this information, including whether it comes from our systems or environment, are unknown," a Fujitsu spokesperson said. 

Marketo is a reliable source, according to Ivan Righi, a cyber threat intelligence expert at Digital Shadows. The veracity of the material stolen, according to Righi, cannot be validated, but prior data leaks by the group have been found to be real. 

"Therefore, it is likely that the data exposed on their website is legitimate. At the time of writing, Marketo has only exposed a 24.5 MB 'evidence package,' which contained some data relating to another Japanese company called Toray Industries. The group also provided three screenshots of spreadsheets allegedly stolen in the attack," Righi said.

The group has gone as far as sending samples of stolen data to a company's competitors, clients, and partners in the past to embarrass victims into paying for their data back. The group has listed hundreds of firms on their leak site, most notably Puma, and releases one every week, usually selling data from US and European corporations. At least seven industrial goods and services firms, as well as healthcare and technology firms, have been targeted. 

According to Brett Callow, a ransomware expert, and threat analyst at Emsisoft, it's unknown how Marketo gets the data it offers, but there's evidence that the data is frequently linked to ransomware attacks.