Elizabeth Montalbano reports:
Someone claiming to represent the BianLian ransomware group is sending top executives from various organizations snail-mail extortion letters informing them that their IT network has been compromised and threatening to delete or leak sensitive company data.
Sending physical letters through the mail system is an unusual move for a cybercriminal group, which typically sends ransom notes in digital form following a cyberattack. The letters mimic those conventional ransom notes, demanding a payment within 10 days in exchange for not leaking the data, researchers from both Arctic Wolf and Guidepoint Security revealed in separate blog posts.
Read more at Dark Reading.