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Training Camp • Cybersecurity Glossary
Account takeover ATO is an attack where adversaries hijack a legitimate users account via stolen credentials, phishing, or credential stuffing to commit fraud.
Account Takeover (ATO) Definition: Account takeover ATO is an attack where adversaries hijack a legitimate users account via stolen credentials, phishing, or credential stuffing to commit fraud.
Account takeover (ATO) is an identity-based attack in which an adversary gains unauthorized control of a legitimate user's account, typically through stolen credentials, credential stuffing, phishing, session hijacking, or SIM swapping. Once in control, attackers commit fraud, exfiltrate data, send phishing from the trusted account, or pivot deeper into connected systems. Defenses include multi-factor authentication, anomaly and bot detection, credential-breach monitoring, and step-up authentication for high-risk actions.
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