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"We didn't notice anything": Hackers manipulate 27,000-euro bill

Published on October 6, 2025

Criminal hackers are increasingly penetrating in email accounts, changing bank details unnoticed and leading payments to their own accounts.A current case shows how close a company escaped a damage of 27,000 euros. Fraudsters are increasingly using digital vulnerabilities to capture money with fake bills.They chop email accounts, exchange the IBAN on invoices and hope that the money will flow to their accounts. This is how the mesh of the IBAN fraudsters A current case shows how dangerous it is.Olaf Zimmermann's company had carried out work for a large company.Criminal accessed his mailbox unnoticed and sent the customer a manipulated invoice for 27,000 euros net.She was deceptively real: "They imitated 1: 1 of our form from the Internet, also knew who was personally involved and we did not notice anything," reports Zimmermann. ADVERTISEMENT The company Zimmermann was lucky in the accident. Only the customer's accountant noticed that the Iban was part of a Portuguese bank.She stopped the transfer in time.Sascha Straub from the Munich Consumer Center warns: This form of invoice fraud increases because emails are sent unencrypted with invoice PDFs. So you always protect yourself the account details at high sums.When in doubt, call the biller and have the bank details confirm.Or request a paper bill.