Description of Campaign
Phishing emails with malicious links distributed through Azure Front Door (AFD) were used to steal credentials from unsuspecting users. Compromised business and personal email accounts were leveraged to deliver spam emails. Clicking the links direct the user to fake domains that appear to be associated with SendGrid, Docusign, Amazon, Microsoft, and Adobe.
Our ATR Team gathers and analyzes information from multiple open and closed sources before disseminating intelligence reports. This campaign was researched by Resecurity and
shared publicly.
How to use this article:
- Scroll down and review the Product Countermeasures section of this article. Consider implementing them if they are not already in place.
- Review the following articles:
This Knowledge Base article discusses a specific threat that's being tracked. The list of IOCs will change over time; check Trellix Insights for the latest IOCs.
Campaign IOC
| Type |
Value |
| DOMAIN |
gridapisignout.azurefd.net |
| DOMAIN |
amazon-uk.azurefd.net |
| DOMAIN |
webmailsign.azurefd.net |
| DOMAIN |
onlinesigninlogin.azurefd.net |
| DOMAIN |
owasapisloh.azurefd.net |
| DOMAIN |
docuslgn-micros0ft983-0873878383.azurefd.net |
Minimum set of Manual Rules to improve protection to block this campaign:
IMPORTANT: Always follow best practices when you enable new rules and signatures.
When you implement new rules or signatures, always set them to Report mode first and check the alerts generated. Resolve any issues that arise and then set the rules to Block. This step mitigates against triggering false positives and allows you to refine your configuration.
For more information, see KB87843 - List of and best practices for Endpoint Security Dynamic Application Containment rules.
Endpoint Security - Advanced Threat Protection:
Rule ID: 5 Use GTI URL reputation to identify trusted or malicious processes
