Pictured: An Office 365 retail pack at the Microsoft Store. (Raysonho @ Open Grid Scheduler / Grid Engine, CC0, via Wikimedia Commons)

Researchers have recently warned of two massive phishing operations, collectively targeting hundreds of thousands of users – one seeking credentials for business services such as Office 365 and the other abusing Facebook Messenger to go after roughly 450,000 of the social media giant's account holders.

Active since last week, with a major surge on Oct. 15, the Office 365 operation has reached tens of thousands of inboxes through multiple connected campaigns spoofing well-known applications such as Microsoft Office, Microsoft Teams and Zoom in hopes that users will be fooled into giving away their usernames and passwords. Senior executives and finance personnel have been identified as among the targets of the operation.

Please register to continue.

Already registered? Log in.

Once you register, you'll receive:

  • News analysis

    The context and insight you need to stay abreast of the most important developments in cybersecurity. CISO and practitioner perspectives; strategy and tactics; solutions and innovation; policy and regulation.

  • Archives

    Unlimited access to nearly 20 years of SC Media industry analysis and news-you-can-use.

  • Daily Newswire

    SC Media’s essential morning briefing for cybersecurity professionals.

  • Learning Express

    One-click access to our extensive program of virtual events, with convenient calendar reminders and ability to earn CISSP credits.