What is an Account Takeover (ATO)?
Article Date: March 31, 2023
Recently I discovered some great definitions on what an account takeover is and how it happens. I found this from Fiserv, a financial Technology company. Their explanation was simple and to the point and I wanted to share them with you here.
An Account takeover (ATO) is an attack in which cybercriminals take ownership of online accounts using stolen passwords and usernames. These cybercriminals then use these credentials to commit fraud. These bad actors purchase victims’ Personally Identifiable Information (PII) via the dark web—typically gained from social engineering, e.g., phishing, vishing, or smishing attacks (detailed below) or data breaches. Stolen PII (e.g., name, address, email, phone number, date of birth, business name, cellphone provider, social media and login accounts and passwords) provides the necessary credentials for a fraudster to pose as a cardholder.
With this information fraudsters can engage with the victim’s account holders and make changes to accounts or card settings to execute fraud. They may make demographic changes (e.g., phone numbers, emails, passcodes), or apply for increased limits, Personal Identification Number (PIN) changes and/or travel exemptions to suppress or interfere with our fraud-monitoring tools.
The activities described above are most commonly associated with merchant data breaches described in media reports. However, in the case of account takeover, the stolen data is not obtained from a payment system.
Schemes that Contribute to Account Takeover
Skimming and Malware
Skimming and deployment of point of sale (POS) [cash register] terminal malware continue to be widespread methods for stealing data. Smaller, local merchants are now more likely to be compromised than in years past. Stolen data, which is collected using POS malware, is passed to criminal networks through remote, wireless technologies with increasing speed. By reacting to fraud events quickly, your organization can significantly mitigate losses.
Phishing
The prevalence of phishing (tricking victims into revealing confidential information) and its variants continue to rise. Phishing schemes are becoming more targeted (such as “spear-phishing”) and more difficult to identify than in the past. Instead of using only suspicious links in poorly designed emails, phishing emails are mimicking legitimate websites and appear more polished and credible. The use of web address shortening tools, such as TinyURL, make detection of suspicious links more difficult, even by savvy users. It is important to remind cardholders to safeguard their financial data and their online banking credentials against criminals trying to harvest it.
Vishing and Smishing
Smishing and Vishing schemes use sophisticated methods combined with social engineering to deceive cardholders into revealing critical information and disregarding legitimate fraud warnings. Smishing is the fraudulent practice of sending text messages claiming to be from reputable companies to induce individuals to reveal personal information, such as passwords or credit card numbers. Vishing is the fraudulent practice of making phone calls or leaving voice messages claiming to be from reputable companies to induce individuals to reveal personal information, such as bank details and credit card numbers. Cardholders may be sent a voice or text message with transaction details and requesting the cardholders confirm. When they respond, they may be questioned for account details, or they may be asked to call back a number to provide account information. In some instances, they are sent a one-time passcode (OTP). The caller or text message then instructs the cardholder to reply “No Fraud” to text/voice messages.
It is important to be on the lookout for these kinds of fraudulent messages that disguise themselves as legitimate fraud notifications. These schemes use sophisticated methods combined with social engineering to deceive cardholders into revealing critical information and disregarding legitimate fraud warnings. Additional red flags of note include hyperlinks and grammatical and punctuation mistakes.
Malicious Software
Malicious software, including software which compromises account-holder computers locally via Man-in-the-Browser (MitB) attacks are a significant threat to the security of financial data. Man-in-the-Browser attacks install malicious software in the background via “drive by download.” This malware is then able to monitor and hijack user web sessions to then transfer funds or harvest payment cards and online banking credentials, while redirecting the legitimate cardholder to a fictitious error page. This type of malware often deploys automatically when a user visits a compromised website.
Maintaining a secure, up-to-date operating system along with robust security and anti-malware software are critical first steps in preventing this type of fraud. Availability and deployment of automation and crime-ware is increasing in the card fraud world. Both all-in-one malware packages designed to compromise computer systems (e.g., Zeus, Citadel, Tilon) as well as individual tools able to crack passwords and to automatically carry out brute force attacks are available for purchase on underground websites and on criminal forums. Heavy reliance on one type of security tool or on older tools could lead to more fraud loss. It is always best for customers and businesses to use multi-layered detection and prevention strategy like checking your accounts daily through an app, monitoring for suspicious activity, regularly changing passwords ensuring that passwords are long and unique.
Wilson Bank and Trust is here for you. Should you need help, please do not hesitate to reach out to us online at wilsonbank.com, our mobile app, or call us at (844) WBT-BANK (844-928-2265).
Have another thought, tip or suggestion? Leave it in the comments below. I would love to hear from you!
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