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CARDING & HACKING
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Two-factor authentication and possible ways to bypass it
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<blockquote data-quote="Carders" data-source="post: 651" data-attributes="member: 17"><p><h3>Ways to bypass two-factor authentication</h3><p><em>In this article, we will talk in detail about the pros and cons of the most popular data protection method — two-factor authentication. You will also learn 6 ways to get around it.</em></p><p></p><p>The latest account security techniques include two-factor authentication (2FA). It is used everywhere: both in corporate and personal accounts all over the world. It means delivery of a special code to the device, which must be entered after entering the password from the account. But these are not all the forms of 2FA that we will discuss in this article.</p><p></p><p>Two-factor authentication allows you to additionally protect your account from hacking. But even this will not provide a 100% guarantee that scammers will not find a way around it. To do this, we will find out how to circumvent it in order to secure your data.</p><p></p><p></p><p>Two-factor authentication can take the form of completely different ways to confirm ownership of an account. The choice depends on the system or user preferences. It happens that a certain account requires the highest level of protection. In this case, it is better to use " multi-factor authentication "(MFA), which includes several verification factors. For example, password + physical token + biometrics. And this method of protecting your account is much more reliable than classic two-factor authentication.</p><p></p><p><strong>Types of two-factor authentication</strong></p><p>Some services and applications allow you to choose which type of verification to use in addition to the password, and some do not. Next, we will analyze all the verification methods:</p><p></p><p><strong>2FA via SMS</strong></p><p>This authentication method requires that the <strong>user enter their phone number when setting up their profile for the first</strong> time. Then, each time you log in to the system, you need to enter a one-Time confirmation code (One-Time Password, OTP), usually consisting of four or six digits.</p><p></p><p>This verification method is the most popular, because almost all people have mobile phones with the ability to exchange SMS messages, and you don't need to install additional applications. Problems with 2FA via SMS occur only when the network signal is lost or if there are problems with the phone's performance.</p><p></p><p><strong>2FA via voice call</strong></p><p>This <strong>authentication method involves dialing the user's phone</strong> number. In some services, the call itself is sufficient for authorization, and the login is done automatically. In other cases, you need to answer the call, listen to the code, and then enter it.</p><p></p><p><strong>2FA by email</strong></p><p>The method is similar to 2FA via SMS, but a one-time confirmation code is sent as an email to your email address. One of the options for email authentication is to click on a unique link that provides access to the account.</p><p></p><p>In this case, an internet connection is required. This is not the best method, because such an email often ends up in Spam, so it takes more time to log in.</p><p></p><p>It is also very easy and fast for attackers to break into an account with email authentication, if they already have access to this very mail.</p><p></p><p><strong>2FA via TOTP apps</strong></p><p></p><p>These apps generate a temporary one-time <strong>code that is between six and eight digits long and is updated every 30 seconds</strong>. After entering the code, the user gets access to the account.</p><p></p><p><strong>The advantage of this method is that it is easy to implement and use</strong>. The user does not need to wait for the email, they immediately receive a password for confirmation. This method is more <strong>reliable than 2FA via SMS</strong>, because you can't see the code on the lock screen or on a Bluetooth-connected fitness bracelet.</p><p></p><p><strong>2FA via a hardware key</strong></p><p>This method uses <strong>physical devices for authorization. </strong>For example, a USB flash drive inserted into your computer, an NFC card, or a TOTP keychain that generates an authorization code every 30/60 seconds.</p><p></p><p>You don't need an internet connection here. This is one of the simplest and most secure 2FA methods. But it can be costly for businesses to produce and maintain such devices for each user. In addition, there is always a risk of losing the key.</p><p></p><p><strong>6 ways to bypass two-factor authentication</strong></p><p>Undoubtedly, these methods also have disadvantages that scammers use to hack. Next, we'll describe how hackers can circumvent two-factor authentication.</p><p></p><p><strong>1. Bypass 2FA using social engineering</strong></p><p>In this case, the fraudster tricks the victim into unknowingly providing important information about the secret code. Already having a username and password to enter, the <strong>fraudster calls or sends a message, convincing the victim to transfer the 2FA code.</strong></p><p></p><p>In another case, the attacker impersonates the user and says that his account is blocked, or there are some problems with the authenticator application. If they are lucky, they will be granted one-time access to their account and will be able to reset and change their password.</p><p></p><p><strong>2. Bypass 2FA with open authorization (OAuth)</strong></p><p></p><p>For example, to log in to the app, you need to grant partial access to your VK or Facebook account. This is how the selected app gets some of the account's permissions, but doesn't store the account's username and password.</p><p></p><p>There is a "consent phishing" method that allows a criminal to bypass entering credentials and any two-factor authentication. For example, an attacker pretends to be a legitimate application with OAuth authorization and sends a message to the victim asking for access. If the victim grants such access, the attacker will gain access to the account.</p><p></p><p><strong>3. Bypass 2FA with Brute-Force</strong></p><p>In this case, attackers use brute-force passwords. This method is only successful for legacy systems. For example, some old TOTP keychains have a code length of only four digits. And the smaller the code, the easier it is to crack.</p><p></p><p>But a serious <strong>obstacle for hackers is the limited validity time of a one-time code (30/60 seconds)</strong>. Thus, attackers have a limited number of codes that can be sorted out before they change. However, if two-factor authentication is configured correctly, then this type of attack will not be possible in principle — the user will be blocked after several incorrectly entered OTP codes.</p><p></p><p><strong>4. Bypassing 2FA with previously generated tokens</strong></p><p>There are platforms that allow users to generate 2FA codes in advance. For example, in the security settings of your Google account, you can download a document with backup codes that are valid for a long time. They can be used in the future to bypass 2FA.</p><p></p><p>These codes are useful, for example, if the device is lost. But if such a document or at least one backup code falls into the hands of a criminal, he will very easily gain access to the account</p></blockquote><p></p>
[QUOTE="Carders, post: 651, member: 17"] [HEADING=2]Ways to bypass two-factor authentication[/HEADING] [I]In this article, we will talk in detail about the pros and cons of the most popular data protection method — two-factor authentication. You will also learn 6 ways to get around it.[/I] The latest account security techniques include two-factor authentication (2FA). It is used everywhere: both in corporate and personal accounts all over the world. It means delivery of a special code to the device, which must be entered after entering the password from the account. But these are not all the forms of 2FA that we will discuss in this article. Two-factor authentication allows you to additionally protect your account from hacking. But even this will not provide a 100% guarantee that scammers will not find a way around it. To do this, we will find out how to circumvent it in order to secure your data. Two-factor authentication can take the form of completely different ways to confirm ownership of an account. The choice depends on the system or user preferences. It happens that a certain account requires the highest level of protection. In this case, it is better to use " multi-factor authentication "(MFA), which includes several verification factors. For example, password + physical token + biometrics. And this method of protecting your account is much more reliable than classic two-factor authentication. [B]Types of two-factor authentication[/B] Some services and applications allow you to choose which type of verification to use in addition to the password, and some do not. Next, we will analyze all the verification methods: [B]2FA via SMS[/B] This authentication method requires that the [B]user enter their phone number when setting up their profile for the first[/B] time. Then, each time you log in to the system, you need to enter a one-Time confirmation code (One-Time Password, OTP), usually consisting of four or six digits. This verification method is the most popular, because almost all people have mobile phones with the ability to exchange SMS messages, and you don't need to install additional applications. Problems with 2FA via SMS occur only when the network signal is lost or if there are problems with the phone's performance. [B]2FA via voice call[/B] This [B]authentication method involves dialing the user's phone[/B] number. In some services, the call itself is sufficient for authorization, and the login is done automatically. In other cases, you need to answer the call, listen to the code, and then enter it. [B]2FA by email[/B] The method is similar to 2FA via SMS, but a one-time confirmation code is sent as an email to your email address. One of the options for email authentication is to click on a unique link that provides access to the account. In this case, an internet connection is required. This is not the best method, because such an email often ends up in Spam, so it takes more time to log in. It is also very easy and fast for attackers to break into an account with email authentication, if they already have access to this very mail. [B]2FA via TOTP apps[/B] These apps generate a temporary one-time [B]code that is between six and eight digits long and is updated every 30 seconds[/B]. After entering the code, the user gets access to the account. [B]The advantage of this method is that it is easy to implement and use[/B]. The user does not need to wait for the email, they immediately receive a password for confirmation. This method is more [B]reliable than 2FA via SMS[/B], because you can't see the code on the lock screen or on a Bluetooth-connected fitness bracelet. [B]2FA via a hardware key[/B] This method uses [B]physical devices for authorization. [/B]For example, a USB flash drive inserted into your computer, an NFC card, or a TOTP keychain that generates an authorization code every 30/60 seconds. You don't need an internet connection here. This is one of the simplest and most secure 2FA methods. But it can be costly for businesses to produce and maintain such devices for each user. In addition, there is always a risk of losing the key. [B]6 ways to bypass two-factor authentication[/B] Undoubtedly, these methods also have disadvantages that scammers use to hack. Next, we'll describe how hackers can circumvent two-factor authentication. [B]1. Bypass 2FA using social engineering[/B] In this case, the fraudster tricks the victim into unknowingly providing important information about the secret code. Already having a username and password to enter, the [B]fraudster calls or sends a message, convincing the victim to transfer the 2FA code.[/B] In another case, the attacker impersonates the user and says that his account is blocked, or there are some problems with the authenticator application. If they are lucky, they will be granted one-time access to their account and will be able to reset and change their password. [B]2. Bypass 2FA with open authorization (OAuth)[/B] For example, to log in to the app, you need to grant partial access to your VK or Facebook account. This is how the selected app gets some of the account's permissions, but doesn't store the account's username and password. There is a "consent phishing" method that allows a criminal to bypass entering credentials and any two-factor authentication. For example, an attacker pretends to be a legitimate application with OAuth authorization and sends a message to the victim asking for access. If the victim grants such access, the attacker will gain access to the account. [B]3. Bypass 2FA with Brute-Force[/B] In this case, attackers use brute-force passwords. This method is only successful for legacy systems. For example, some old TOTP keychains have a code length of only four digits. And the smaller the code, the easier it is to crack. But a serious [B]obstacle for hackers is the limited validity time of a one-time code (30/60 seconds)[/B]. Thus, attackers have a limited number of codes that can be sorted out before they change. However, if two-factor authentication is configured correctly, then this type of attack will not be possible in principle — the user will be blocked after several incorrectly entered OTP codes. [B]4. Bypassing 2FA with previously generated tokens[/B] There are platforms that allow users to generate 2FA codes in advance. For example, in the security settings of your Google account, you can download a document with backup codes that are valid for a long time. They can be used in the future to bypass 2FA. These codes are useful, for example, if the device is lost. But if such a document or at least one backup code falls into the hands of a criminal, he will very easily gain access to the account [/QUOTE]
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