US-CERT is aware of public reports of an active spear-phishing attack via email messages directed at United Services Automobile Association (USAA) members. These messages contain the subject line “Deposit Posted” and contain a randomly generated four-digit number placed in the USAA security zone section. The messages ask users to open an attached file containing malicious software that if activated could provide access to a user’s personal information.
US-CERT encourages users to do the following to help mitigate the risk: