Over 80% of scam emails globally targeted Japan in May: security firm
Of the record-high 770 million scam emails sent globally in May, Proofpoint analyzed 240 million containing sender data and found 81.4 percent of those targeted Japanese speakers, the company said in a recent report.
"Fraudulent emails were easily spotted previously because of unnatural wording, but the advancement of generative AI has helped produce natural sentences, enabling them to break through the language barrier," Proofpoint Japan's Yukimi Sota said.
According to Proofpoint, which says it analyzes around a quarter of emails sent globally, the volume of nefarious emails started increasing sharply around the time when Russia began its full-scale invasion of Ukraine in February 2022.
There were 100 million to 200 million such emails sent each month before 2025, but that figure surged to more than 500 million per month this year, the company said.
Many are phishing emails sent from addresses posing as securities firms. They guide recipients to fake websites that are used to steal personal information such as email addresses and passwords, giving hackers the ability to hijack accounts.
If corporate email and security credentials are stolen, it could give attackers access to unauthorized internal communication systems on which further phishing emails can be sent.
According to Sota, the majority of email scams targeting Japan used a specific cybercrime program that uses the Chinese language. The number of such emails plunged during the Lunar New Year from late January to early February.
"Their unprecedented scale and sophisticated methods raise a possibility of an organized attack led by a foreign government," Sota said, calling on Japanese companies to enhance cybersecurity measures such as adopting multi-factor authentication.
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