10/30/2025
We would like to inform you of an ongoing phishing campaign that has targeted several Microsoft users and has become increasingly common in the past month.
What is happening?
Users are receiving deceitful “urgent” emails from email addresses that use words such as Microsoft, it.support, domain.administrator, etc., as part of their domain name or username to trick users into thinking these emails are coming from legitimate organizations, such as Microsoft.
These emails commonly include headers evoking a sense of urgency, such as the following:
• “ACTION REQUIRED - Email services Affected”
• “Your Microsoft 365 subscription expires soon.”
• “Microsoft: Important - Verify Your Recent Purchase”
• “Action Required: Pay your past due invoice to avoid Microsoft services interruption.”
Furthermore, these emails often include HTML files that simulate a calendar invite, which automatically triggers Outlook to generate an event on the user's Outlook calendar.
What this means for you?
It’s important to highlight that receiving these emails and calendar invites does not mean that the user's account has been compromised. However, this is an indication that your organization is being targeted, and that users who are not following recommended cybersecurity practices, such as verifying email addresses of senders, using multi-factor authentication, using strong passwords, avoiding clicking on external links, etc., are at risk of being compromised.
If you or anyone in your company has experienced this issue, please send us an email at [email protected].
Reminders:
• Always check the sender email address for incoming email, especially if the email looks suspicious or is flagged as urgent.
• Do not click on links from emails unless you are sure you are expecting an email with a link from a legitimate sender.
• If an email looks suspicious, call or speak with the sender directly to confirm it is legitimate.
• Check official websites or call official numbers of the organizations you use, such as Microsoft, ComEd, Adobe, AT&T, etc., to verify the status of your services.
Thank you for staying alert and helping us keep you safe and secure.
KCS Information Technology Inc.