According to a recent report by ImmuniWeb, more than 21 million login credentials stolen from Fortune 500 companies have been found in various places on the dark web, many of them already cracked and available in plaintext form.
Most of them were from tech companies, closely followed by organisations in the financial industry. Entities in the healthcare, energy, telecommunications, retail, industrial, transport, aerospace and defence sectors are also on the list.
The researchers reveal a worrying statistic: “95% of the credentials contained unencrypted, or brute-forced and cracked by the attackers, plaintext passwords.”
Despite finding as many as 21 million login records, the report notes that only 4.9 million of them were unique, “suggesting that many users are using identical or similar passwords.”