Adform, a major advertising technology company serving roughly 14,000 businesses and holding nearly 30% of the demand-side platform market, has suffered a supply chain compromise that turned its trusted ad-serving infrastructure into a distribution channel for cryptocurrency-stealing malware. Security researcher Kevin Beaumont uncovered the breach and revealed that attackers hijacked a widely used JavaScript file to silently infect visitors across thousands of downstream websites. The compromised file, a tracking script hosted at Adform’s own domain, is embedded on countless client websites to monitor advertising performance. Malicious payload file (Source: Kevin Beaumont) Adform Advertising Platform...
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