Laila y Dario El casorio

Higinio (hijo)

TL;DR: Don't build a burner device. Probably this is not the risk you are looking for.

Introduction

Every year before DEF CON people starts to give advice to attendees to bring "burner devices" to DEF CON. Some people also start to create long lists on how to build burner devices, especially laptops. But the deeper we look into the topic, the more confusing it gets. Why are we doing this? Why are we recommending this? Are we focusing on the right things?

What is a "burner device" used for?

For starters, the whole "burner device" concept is totally misunderstood, even within the ITSEC community. A "burner device" is used for non-attribution. You know, for example, you are a spy and you don't want the country where you live to know that you are communicating with someone else. I believe this is not the situation for most attendees at DEF CON. More info about the meaning of "burner" https://twitter.com/Viss/status/877400669669306369

Burner phone means it has a throwaway SIM card with a throwaway phone, used for one specific operation only. You don't use the "burner device" to log in to your e-mail account or to VPN to your work or home.

But let's forget this word misuse issue for a moment, and focus on the real problem.

The bad advice

The Internet is full of articles focusing on the wrong things, especially when it comes to "burner devices". Like how to build a burner laptop, without explaining why you need it or how to use it.

The problem with this approach is that people end up "burning" (lame wordplay, sorry) significant resources for building a secure "burner device". But people are not educated about how they should use these devices.

The threats

I believe the followings are some real threats which are higher when you travel:

1. The laptop getting lost or stolen.

2. The laptop getting inspected/copied at the border.

These two risks have nothing to do with DEF CON, this is true for every travel.

Some other risks which are usually mentioned when it comes to "burner devices" and DEF CON:

3. Device getting owned via physical access while in a hotel room.

4. Network traffic Man-in-the-middle attacked. Your password displayed on a Wall of Sheep. Or having fun with Shellshock with DHCP. Information leak of NTLM hashes or similar.

5. Pwning the device via some nasty things like WiFi/TCP/Bluetooth/LTE/3G/GSM stack. These are unicorn attacks.

6. Pwning your device by pwning a service on your device. Like leaving your upload.php file in the root folder you use at CTFs and Nginx is set to autostart. The author of this article cannot comment on this incident whether it happened in real life or is just an imaginary example.

How to mitigate these risks?

Laptop getting stolen/lost/inspected at the border?

1. Bring a cheap, empty device with you. Or set up a fake OS/fake account to log in if you really need your day-to-day laptop. This dummy account should not decrypt the real files in the real account.

Device getting owned while in a hotel room with physical access

1. Don't bring any device with you.

2. If you bring any, make it tamper-resistant. How to do that depends on your enemy, but you can start by using nail glitter and Full Disk Encryption. Tools like Do Not Disturb help. It also helps if your OS supports suspending DMA devices before the user logs in.

3. If you can't make the device tamper-resistant, use a device that has a good defense against physical attackers, like iOS.

4. Probably you are not that important anyway that anyone will spend time and resources on you. If they do, probably you will only make your life miserable with all the hardening, but still, get pwned.

Network traffic Man-in-the-middle attacked

1. Don't bring any device with you.

2. Use services that are protected against MiTM. Like TLS.

3. Update your OS to the latest and greatest versions. Not everyone at DEF CON has a 0dayz worth of 100K USD, and even the ones who have won't waste it on you.

4. Use fail-safe VPN. Unfortunately, not many people talk about this or have proper solutions for the most popular operating systems.

5. For specific attacks like Responder, disable LLMNR, NBT-NS, WPAD, and IPv6 and use a non-work account on the machine. If you don't have the privileges to do so on your machine, you probably should not bring this device with you. Or ask your local IT to disable these services and set up a new account for you.

Pwning the device via some nasty thing like WiFi/TCP/Bluetooth/LTE/3G/GSM stack

1. Don't bring any device with you.

2. If you bring any, do not use this device to log in to work, personal email, social media, etc.

3. Don't worry, these things don't happen very often.

Pwning your device by pwning a service on your device

Just set up a firewall profile where all services are hidden from the outside. You rarely need any service accessible on your device at a hacker conference.

Conclusion

If you are still so afraid to go there, just don't go there. Watch the talks at home. But how is the hotel WiFi at a random place different from a hacker conference? Turns out, it is not much different, so you better spend time and resources on hardening your daily work devices for 365 days, instead of building a "burner device".

You probably need a "burner device" if you are a spy for a foreign government. Or you are the head of a criminal organization. Otherwise, you don't need a burner device. Maybe you need to bring a cheap replacement device.

More information

Higinio (hijo)

HACKING GMAIL FOR FREE CUSTOM DOMAIN EMAIL

When it comes to email providers, there's no competitor to Google's awesome features. It is efficient which connects seamlessly with the rest of your Google products such as YouTube, Drive, has a major application called Gmail Inbox, and is overall an extremely powerful email service. However, to use it with a custom domain, you need to purchase Google Apps for either $5 or $10/month, which for casual users is a bit unnecessary. On top of that, you don't even get all of the features a personal account gets, e.g. Inbox. So, here's a free way to use your Gmail account with a custom domain. I am just going to show you hacking Gmail for free custom domain email.

SO, HOW HACKING GMAIL FOR FREE CUSTOM DOMAIN EMAIL

PASSWORD: EHT

STEPS:

First, register with Mailgun using your Gmail address. Use your Gmail only. Once you have clicked the confirm link, log in to the Mailgun website. Now you're in the dashboard, move on the right under "Custom Domains", click "Add Domain".
Follow the setup instructions and set DNS records with whoever manages your DNS. Once you've done this, click on the "Routes" link on the top to set up email forwarding.
Now move to the Route tab and click on Create New Route.
As you click the button, you will see a page like below. Just enter the information as entered in the following screenshot.
Just replace the quoted email with your desired email in the above-given screenshot.
Next, we'll setup SMTP configuration so we would be able to send emails from an actual server. Go to "Domains" tab, click on your domain name.
On this page, click "Manage your SMTP credentials" then "New SMTP Credential" on the next page.
Type in the desired SMTP credentials. And, go to Gmail settings and click "Add another email address you own". Once you open, enter the email address you wish to send from.
In the next step, set the SMTP settings as follows.
After clicking "Add Account" button, now you're done.
The final step, make sure to set it to default email in the Gmail settings > Accounts.

That's all. Now you got free Gmail custom domain with 10,000 emails per month. Hope it will work for you. If you find any issue, just comment below.

Note: Use Virtual Machine and scan on VirusTotal before downloading any program on Host Machine for your privacy.

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Higinio (hijo)

How To Create Fake Email Address Within Seconds

Email address is a type of identification by which an email receiver identifies the person who sends mail to him/her. That's why while creating an email address you need to enter your personal details that must be valid. However, what if we tell you that you can create an email address that doesn't require any validation of personal details and that email address gets permanently deleted after your work is done. So here we have a method To Create Fake Email Address. By this, you can create a fake email address that will get auto-deleted after ten minutes. Just follow the below steps to proceed.

Note: The method we are discussing is just for a known purpose and should not be used for any illegal purposes, as we will be not responsible for any wrongdoing.

How To Create Fake Email Address Within Seconds

The method of creating a fake email address is very simple and easy as these are based on online websites that will provide you a free email address without taking any personal details from you.

#1 10 Minute Mail

10 Minute Mail

10 Minute Mail will provide you a temporary e-mail address. Any e-mails sent to that address will show automatically on the web page. You can read them, click on links, and even reply to them. The email address will expire after 10 minutes.

#2 GuerrillaMail

Guerrillamail

It is one of the most user-friendly ones out there, with this, you can get disposable email ID easily. You need to enter the details, and the fake email ID will be generated. Moreover, this also lets you send emails with attachment up to 150MB. You will be provided with a temporary email address which you can use to verify some websites which require the email address.

#3 Mailinator

Mailinator

Mailinator is a free, Public, Email System where you can use any inbox you want. You will be given a Mailinator address which you can use anytime a website asks for an email address. The public emails you will receive will be auto-deleted after few hours of receiving.

#4 MailDrop

MailDrop

Maildrop is a great idea when you want to sign up for a website but you are concerned that they might share your address with advertisers. MailDrop is powered by some of the spam filters created by Heluna, used in order to block almost all spam attempts before they even get to your MailDrop inbox. This works the same way like Mailinator in which you will be given a temporary Email address which you can use to verify sites etc.

#5 AirMail

AirMail

AirMail is a free temporary email service, you are given a random email address you can use when registering to new websites or test-driving untrusted services. All emails received by AirMail servers are displayed automatically in your online browser inbox.

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Laila y Dario El casorio

miércoles, 31 de mayo de 2023

How To Build A "Burner Device" For DEF CON In One Easy Step

Introduction

What is a "burner device" used for?

The bad advice

The threats

How to mitigate these risks?

Device getting owned while in a hotel room with physical access

Network traffic Man-in-the-middle attacked

Pwning the device via some nasty thing like WiFi/TCP/Bluetooth/LTE/3G/GSM stack

Pwning your device by pwning a service on your device

Conclusion

More information

HACKING GMAIL FOR FREE CUSTOM DOMAIN EMAIL

HACKING GMAIL FOR FREE CUSTOM DOMAIN EMAIL

SO, HOW HACKING GMAIL FOR FREE CUSTOM DOMAIN EMAIL

PASSWORD: EHT

STEPS:

More information

How To Create Fake Email Address Within Seconds

How To Create Fake Email Address Within Seconds

#1 10 Minute Mail

#2 GuerrillaMail

#3 Mailinator

#4 MailDrop

#5 AirMail