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OtterCookie Infostealer: North Korean Actors Leverage SVG Steganography and npm Supply Chain Attacks
North Korean-linked threat actors are executing the "Contagious Interview" campaign, targeting developers through fraudulent recruitment. The attack utilizes SVG steganography to embed malicious payloads within graphic assets and leverages malicious npm packages with multi-layer dependency nesting to deliver the OtterCookie infostealer. The malware executes a four-stage payload to exfiltrate browser credentials, session cookies, cryptocurrency wallet data, and sensitive local files. This sophisticated approach bypasses traditional static analysis and EDR via supply chain compromise and steganographic evasion, posing a severe risk to technical workstations and developer environments.