Photo ZIP Campaign Auth Laundering via Calendly/Google Redirect Links
This rule detects suspicious emails exhibiting patterns associated with 'authentication laundering' by identifying the combination of legitimate scheduling or redirection links (e.g., Calendly, Google Redirect) with potentially malicious indicators such as zip file links, suspicious .cfd domains, or impersonation of booking management services. It calculates a laundering score based on these features and the health of email authentication signals (SPF/DKIM).
Splunk (SPL)
