ESET Online Help

Search English
Select the topic

Spoofing

Cyber attackers use spoofing to impersonate another person or device to gain confidential information, access a system, or cause financial harm to a victim.

How to recognize a spoofing attack?

How to defend against spoofing?

Can spoofing cause financial losses?

What to do if you become a victim of spoofing?

Spoofing is often used in various cyber attacks, including phishing and vishing.

Spoofing can include spoofing an email address, IP address, phone number or even a website.

For example, in email spoofing, an attacker fakes the sender of an email to appear to be from a trusted source, thereby tricking the recipient into sharing sensitive information.

In mobile phone spoofing, the attacker pretends to be a bank or other reputable institution; for example, the real bank number appears on your phone, even though it is a fraudulent call.

What is DNS spoofing?

DNS spoofing, also known as DNS cache poisoning, is a type of cyberattack in which an attacker manipulates DNS records (records used to translate domain names to IP addresses and back from IP addresses to domain names) to redirect users to a fake website.

An attacker inserts fake DNS records into the DNS server cache (or by editing the hosts file). Then, when the user types a legitimate domain name into their browser, such as "example.com," they are redirected to a fraudulent IP address chosen by the attacker. This fake website may look like the real one, but it is used to steal sensitive information such as credentials or financial information or to install malware on the victim's device.

DNS spoofing is dangerous. Users often must realize they are on a fraudulent site because everything looks legitimate. This attack can seriously affect individuals and organizations who may lose confidential information.

You can protect yourself from DNS spoofing by using a VPN.

How to recognize a spoofing attack?

If the email or message contains suspicious links, unusual requests, or incorrect formatting, it may be a spoofing attack. A phone call where the caller ID is unusual or unknown may also be suspect.

How to defend against spoofing?

You can defend yourself against spoofing in several ways:

Use Two-Factor Authentication (2FA)—This extra layer of security makes it harder for attackers to gain access even if they have your credentials.

Update software and systems—Regularly update software, especially antivirus software.

Check the email sender—Verify that the email is from a trusted source before clicking links or downloading attachments.

Use security software—Modern security software can detect and block spoofing attacks.

Be careful when sharing information—Only share personal or financial information over secured channels, especially if you are unsure of the recipient's identity.

Can spoofing cause financial losses?

Yes, spoofing can lead to financial losses if an attacker gains access to your bank accounts or tricks you into sending money to a fake account.

What to do if you become a victim of spoofing?

If you become a victim of spoofing, immediately change your passwords, inform your bank, and, if necessary, contact the Police and cybersecurity experts who will help you mitigate the damage.

Spoofing is a serious threat, but with due diligence and appropriate security measures, you can protect your digital environment and minimize the risks associated with these attacks.