Cybersecurity analysts have revealed a nefarious operation that employs search engine optimization (SEO) poisoning methods to distribute a recognized malware loader known as Oyster (also referred to as Broomstick or CleanUpLoader).
According to Arctic Wolf, this malvertising scheme advertises counterfeit websites that feature trojanized editions of authentic tools such as PuTTY and WinSCP, with the intent to deceive software professionals.