Cybersecurity researchers are calling attention to two recently observed phishing campaigns caught abusing the legitimate services Firebase and Google Apps Script to lure unsuspecting users to malicious content.
In mid-May, Trellix said it identified a spear-phishing operation impersonating a Rothschild & Co employee to target financial executives at banks and energy, insurance, and investment organizations in Africa, Canada, Europe, the Middle East, and South Asia.
The malicious emails contained a fake brochure, identified as a webpage hosted on Firebase and hidden behind a math-quiz custom CAPTCHA. Once the challenge is solved, the victim is served a ZIP file that contains a VBS script.
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