Phishing Your Calendar for A Court Date

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By Tonia Dudley

It’s no surprise threat actors continue to leverage new tactics to get recipients to interact with their content. Cofense Managed Phishing Defense Center (PDC) actioned a campaign reported by several customers’ well-conditioned users, which was then analyzed by our Cofense Intelligence team. We’ve seen a few of these campaigns in the past several weeks; as long as this tactic yields success, we can expect it to be leveraged to make it to the inbox.

As we look at the email in Figure 1, you see that there isn’t anything complex about the email. The subject, “Supreme Court: Contract Agreement,” however, may cause the recipient to further open the attachment.

Figure 1 – Initial email

As the recipient opens the attachment, they will see the standard calendar invite as seen in Figure 2.

Figure 2 – Calendar invite

If the recipient is still curious enough to click the link embedded in the meeting notice or as the threat actor instructs – copy the link below to read message – they are taken to the login page as shown in Figure 3. When you look closer at the URL in the meeting invite, you’ll see one of the most interesting pieces of these campaigns. It used the URL like hxxp://0xc1a9fd67/Court, you may notice there is no “.com” or anything there because when typed into a browser the URL actually is interpreted as hxxp://193[.]169[.]253[.]103/Court. It’s a clever technique that may be part of why it bypasses so many SEGs. It looks like a malformed URL so may be ignored even though it is a correctly, if unusually, formatted URL.

Figure 3 – Landing page