Researchers at Confiant observed a malvertising campaign carried out by a threat actor dubbed eGobbler. The group hijacked roughly 1.16 billion ad impressions to redirect victims to websites hosting malicious payloads. The attack was first observed by security firm Confiant in April when it was exploiting a security flaw in the Google Chrome browser to target millions of iOS users. At the time, Cofiant experts estimated that more than 500 million malicious ads had been served to iOS users at the time.”]
Source: https://securityaffairs.co/wordpress/91927/cyber-crime/egobbler-malvertising-campaign.html