A new Office 365 phishing campaign delivers a fake voicemail message to redirect victims to a Web page that prompts them to enter login credentials, McAfee researchers discovered.
Researchers initially thought one phishing kit was being used to steal users' data; however, an investigation revealed three separate kits and proof of several high-profile companies targeted.
The attack starts with an email informing victims they missed a phone call and instructing them to log into their accounts to access a voicemail. When they load the attached HTML file, it redirects them to a phishing website. Researchers note this attachment varies; in most recent attacks, it contains an audio recording disguised to sound like the beginning of a real voicemail.
When redirected, victims sees a phishing page prompting them to log into their Microsoft accounts. The page is prepopulated with their email addresses, researchers say, a tactic intended to make the scam seem legitimate. Victims who enter their passwords are sent to another page saying the account was "successfully confirmed" before they're redirected to the Office login page.
Researchers were surprised to see three phishing kits used in this attack and say they are "almost identical." They differentiated the kits by analyzing the generated HTML code and parameters accepted by the PHP script. Attackers are primarily after the service industry (18%), followed by finance (12%), IT services (12%), retail (10%), and insurance (9%). A wide range of employees were targeted, they report, from middle management to executive staff.
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