Account Takeover (ATO)
Account takeover happens when attackers use automated bots to try stolen credentials, gaining unauthorized access to user accounts on websites or services.
Prevent Account Takeover Attacks
Protect user accounts with intelligent bot detection
What is Account Takeover?
An account takeover (ATO) is when an attacker gains unauthorized control of a legitimate user's account on a website or service. It often happens after a bot successfully uses stolen login credentials (usernames and passwords) from a data breach to log in. Account takeovers can lead to fraudulent transactions or misuse of the victim's account.
Our article What is account takeover? covers the routes in, the warning signs and which defences stop which route.
How Account Takeovers Work
Account takeovers typically follow this process:
- Credential acquisition: Attackers obtain login credentials through data breaches, phishing, or purchasing stolen data on dark web markets
- Automated testing: Bots attempt these credentials across multiple websites, since many people reuse passwords
- Account access: Once credentials work, attackers gain entry to the account
- Exploitation: The compromised account may be used for fraud, data theft, or further attacks
Signs of Account Takeover
Common indicators of account takeover include:
- Unusual login locations or devices
- Password changes or security setting modifications
- Unexpected account activity
- Communication (emails, messages) sent from the account that the user didn't initiate
Prevention Measures
Websites can reduce account takeover risks by implementing:
- Bot protection systems that identify and block automated login attempts
- Multi-factor authentication (MFA)
- Login attempt limits and CAPTCHA challenges
- Suspicious activity detection
- IP reputation analysis
- Device fingerprinting
Impact on Businesses
Account takeovers can severely damage businesses through:
- Financial losses from fraudulent transactions
- Customer data exposure
- Damaged brand reputation and lost customer trust
- Regulatory penalties for insufficient security measures
Effective bot protection is crucial for preventing the automated attacks that facilitate most account takeovers, protecting both users and the organization's reputation.