[00:00.000 --> 00:05.220] Also, he's going to be speaking about finding hidden gems in temporary mail services. [00:05.220 --> 00:09.620] His name is Ben Bergkahn. He's a pen tester and red teamer. [00:09.620 --> 00:13.140] Previously, he has worked in many things. [00:13.140 --> 00:19.040] Now, I will get him on the stage and let him enjoy the presentation. [00:19.760 --> 00:21.960] Let's give him a round of applause! [00:30.440 --> 00:33.960] So, thank you everyone for coming to this session. [00:33.960 --> 00:36.800] I'm really excited to be here at DEF CON 2021. [00:36.800 --> 00:40.520] So, in this session, I'm going to talk about temporary mail services [00:40.520 --> 00:44.200] and how we can find good gems in those services. [00:44.580 --> 00:48.640] And before that, I want to thank my teammate, Berat Gokartislar. [00:48.640 --> 00:52.280] He's one of the other idea fathers of this project. [00:53.400 --> 00:57.640] My name is Berk, and I'm a penetration tester and a red team entry assist. [00:57.840 --> 01:01.520] And I'm currently working at SecArmy Ltd. as a security consultant. [01:01.900 --> 01:05.660] I'm also a member of Cobalt's core team and a signer grade team. [01:05.660 --> 01:08.160] And I'm a festival fan and a gym rat. [01:08.880 --> 01:12.720] So, let's talk about the main topics of my presentation. [01:13.440 --> 01:18.100] Temporary mail services, also known as disposal email services, [01:18.100 --> 01:21.400] are generally free email services that allow you to receive emails [01:23.660 --> 01:28.640] at a temporary address that self-destructs after a certain time elapses. [01:28.720 --> 01:32.980] While some temporary mail services are public and open for everyone, [01:32.980 --> 01:37.860] and others offer paid private services. [01:38.660 --> 01:41.760] So, what are the pros for temporary mail services? [01:41.760 --> 01:45.580] So, it's a short lifespan, automatically delayed email addresses [01:45.580 --> 01:49.380] and all associated messages after a set of time, [01:49.380 --> 01:51.140] and no long-term commitment. [01:51.140 --> 01:55.520] Users don't have to sign up or provide any personal information [01:55.520 --> 01:58.240] to use a temporary email address. [01:58.580 --> 02:02.120] And anonymity, they allow users to receive emails [02:02.120 --> 02:05.940] without revealing their personal email addresses. [02:06.800 --> 02:15.800] But it should be noted that the mails are hosted on the servers on these services. [02:15.800 --> 02:20.840] So, the mails you receive can be accessible from the service providers [02:20.840 --> 02:25.800] and we don't know if they actually destroy the emails really or not. [02:25.860 --> 02:27.740] So, this is up to them. [02:30.400 --> 02:33.240] Cons about spam avoidance. [02:33.240 --> 02:38.300] So, according to the services, incoming mails are said to be safe [02:38.300 --> 02:41.420] because they pass through the spam filter of their own. [02:41.620 --> 02:45.540] But this protection can be okay for newbies, but for the experienced hackers [02:45.540 --> 02:48.800] or the red teamers, it's not working well. [02:49.280 --> 02:50.980] And public accessibility. [02:51.380 --> 02:55.460] Many temporary mail services reveal inboxes to the public. [02:55.460 --> 03:03.080] This means that anyone can access all the emails that have been received by that inbox. [03:03.480 --> 03:08.360] While these features provide ease of access, it also poses significant privacy risks [03:08.360 --> 03:11.840] if sensitive information is sent to this address. [03:12.160 --> 03:15.960] And this title is going to be our main target in this presentation. [03:16.300 --> 03:18.340] So, story about this presentation. [03:19.060 --> 03:26.780] Just another day, just for a silly application, in a regular time, I tried to get an email [03:26.780 --> 03:29.060] and I used temporary mail. [03:29.100 --> 03:34.020] And I noticed that someone had linked an account from a shopping website. [03:34.020 --> 03:41.580] And after I received this password from email, I realized that there's money inside this user. [03:42.040 --> 03:45.100] And there's live orders inside it. [03:45.100 --> 03:51.840] So, I wondered if such things were common, and I realized that there are tons of similar situations. [03:51.840 --> 03:56.080] Then I wanted to dig deep about the situation and start my research. [03:56.580 --> 04:05.520] So, most temporary mail services, the most popular ones, are temper.email, mailplus, mailend, disbustable. [04:05.560 --> 04:12.320] These are all the public inboxes, and you can just access these inboxes. [04:13.100 --> 04:15.440] And what are these gems? [04:16.060 --> 04:23.000] So, people use these temporary email services for business emails. [04:23.000 --> 04:30.400] In addition to that, Spotify, Netflix, Facebook, Twitter, Instagram, YouTube, Amazon, Aliexpress, Discord, [04:30.400 --> 04:37.800] AT&T, Grammarly, TikTok, OnlyFans, Bitcoin accounts, and even porn accounts, and lots of public information. [04:37.800 --> 04:44.900] And patients, of course, and many, many more, they are using these services to get these services. [04:45.940 --> 04:51.360] And also, I noticed that the marketing emails from numerous Viagra sellers and dating apps, [04:51.360 --> 04:55.840] additionally, there were emails from pornographic sites. [04:55.880 --> 05:01.600] Also, in pornographic emails, the IP addresses from which a user logged in can be leaked. [05:01.600 --> 05:08.500] So, I hope that the users who use temp mail services in their private life also use VPNs. [05:10.200 --> 05:23.100] And you just need to go to one of these email boxes and just type A, double A, triple A, or 1 to see what mail is coming there. [05:23.100 --> 05:24.460] So, it's easy. [05:24.460 --> 05:34.800] In this case, people are lazy, so they just press A and press Enter and just get the inbox and just use these inboxes. [05:36.000 --> 05:49.780] And the example accounts for that, there's a Spotify account, a Steam account, and for some specific web applications, it's about a dancing application. [05:49.780 --> 06:01.200] And this user is using a temporary mail service, so I can reset the password, enter the account, and there's different kinds of information in this account. [06:01.200 --> 06:07.000] Also, saved credit cards, and studio information, etc. [06:07.800 --> 06:13.040] And also, Canopay and Temi accounts. Also, as you can see, someone uses Canopay. [06:13.160 --> 06:19.120] And inside the mail, they inform the user about the Cashcard Reserve account, and Temi is a shopping website. [06:20.280 --> 06:31.180] Also, I found a Discord account, but unfortunately, the user who uses this temporary mail service has a multi-factor authentication. [06:31.360 --> 06:36.940] I just tried for one account, but if you are lucky, you can find another one. [06:38.040 --> 06:44.340] Instagram addresses, so Instagram accounts, you can just reset the password, get into the account. [06:45.340 --> 06:54.540] And also, AT&T prepaid cards here, Facebook accounts, Amazon Web Services. [06:54.720 --> 07:00.610] And this is interesting, so I found hospital records in this temporary mail services. [07:00.610 --> 07:16.610] So, there's a patient who is living in the United States, and you can see their diseases and why their applicant is rejected, [07:16.610 --> 07:23.150] and which location they are going to, which hospital they are going to, which date, rejected date, etc. [07:23.150 --> 07:27.630] You can see, this is all public, you can find in temporary mail services. [07:27.630 --> 07:39.230] There's more, you can see in this mail, they added attachments, and I opened, and there's a lot of patient information here, as you can see. [07:39.230 --> 07:44.970] A lot of secret information in public email services. [07:45.730 --> 07:48.930] And more, yeah, you can see. [07:50.890 --> 07:57.970] And also, I found Paxful. Paxful is a Bitcoin buying and selling application. [07:58.490 --> 08:07.430] But, I'm suggesting you, if you want to hunt these accounts, like this, be sure that don't take over the account in the beginning of the registration. [08:07.710 --> 08:17.550] Just note the email, for example, someone registered for Amazon AWS, just don't change the password immediately. [08:17.550 --> 08:23.190] Just wait, note, and be sure about deleting the mail. [08:23.190 --> 08:28.250] So, there's an option in the mail deletion, in the temp mail service. [08:28.250 --> 08:33.830] So, delete the mail, note the email address, and wait maybe one week, maybe one month. [08:33.830 --> 08:43.050] And then, just reset the password, get the account, and you can see there's maybe good gems inside this account, maybe money, or maybe servers. [08:43.050 --> 08:47.530] But, if you do this in a registration part, there's nothing inside. [08:47.530 --> 08:51.270] So, just be patient for that account. [08:52.210 --> 08:57.810] And also, I found an OnlyFans account here, Premium. [08:58.050 --> 09:01.870] Yeah, I don't prefer to use, but you can find Premium if you want. [09:01.870 --> 09:03.490] And then, there's another one. [09:04.730 --> 09:11.350] And someone just bought something, and there's an invoice in this mail services. [09:11.350 --> 09:21.530] And in that invoice, you can see there's just name and surname and address information here, location information. [09:21.570 --> 09:23.450] You can all find from here. [09:23.450 --> 09:29.290] And if you are a good, skilled pen tester, you can just social engineering these people. [09:29.290 --> 09:33.510] So, hey, Abdul, for example, this victim name is Abdul. [09:33.670 --> 09:39.030] And you can say, hey, Abdul, these items, blah, blah, blah, that you ordered will be sent to this address. [09:39.030 --> 09:40.350] You also know the address. [09:40.810 --> 09:42.830] Blah, blah, blah, stuck in the custom. [09:42.930 --> 09:46.010] So, you need to pay and bump payment link. [09:46.010 --> 09:48.810] And all this information is verified, because we know that. [09:48.810 --> 09:51.910] Name, surname, items, as you can see. [09:52.770 --> 09:55.130] So, it's a good social engineering example. [09:57.210 --> 10:04.990] You can see there's an example social engineering mail that you can just include a payment link, [10:04.990 --> 10:06.830] maybe fake custom website. [10:06.830 --> 10:10.590] The choice is Abdul attacker and depends on the scenario. [10:10.910 --> 10:15.170] Alternatively, you can get other information with that type of attacks. [10:15.450 --> 10:20.270] This method is very effective, because you have all the details about the order. [10:20.270 --> 10:21.410] It appears legitimate. [10:22.950 --> 10:26.510] And this is one of the interesting mails that I found. [10:26.590 --> 10:29.170] It says, nice to see you, I'm glad to meet you. [10:29.170 --> 10:30.270] I'm not married and have children. [10:31.210 --> 10:36.710] Maybe you can find your perfect match in all these mail services. [10:36.710 --> 10:38.090] It's up to you. [10:38.770 --> 10:41.250] And also, still there's a lot of accounts. [10:41.250 --> 10:50.610] So, as you can see, there's someone just signed up for the dynaxy.com as a BTC address, I guess. [10:50.610 --> 10:55.430] And you can see the IP information and new password, Facebook account still. [10:56.330 --> 10:58.690] There's tons of accounts in there. [10:58.690 --> 11:02.670] You can get anything you want. [11:02.750 --> 11:09.670] Also, there's another invoice thing from the right group, Financial Limited. [11:09.810 --> 11:13.270] And it's about positions between Euro and Canadian dollar. [11:13.550 --> 11:17.090] And as you can see, there's a previous ledger balance, something like 5K. [11:17.090 --> 11:18.850] I never even imagined it was 4K. [11:18.850 --> 11:19.770] I don't know. [11:19.770 --> 11:25.870] Maybe there's inside money in this account, but I didn't want to go in this account. [11:25.870 --> 11:27.470] Also, Netflix account. [11:28.530 --> 11:31.530] And I found an application that did buy. [11:31.670 --> 11:36.930] And when I entered, it said, you have nearly 69 Bitcoin. [11:37.510 --> 11:40.730] Probably a fake website, but good one. [11:40.730 --> 11:42.970] I will be very sorry if it's legit, by the way. [11:44.370 --> 11:48.930] And PlayStation Plus accounts, maybe TikTok accounts. [11:49.170 --> 11:53.910] And also, I found an information mail about the Temi website. [11:54.990 --> 11:57.890] Your order has been canceled due to payment. [11:57.890 --> 11:59.590] And I just wonder. [11:59.650 --> 12:02.310] And I reset the password and go into account. [12:02.950 --> 12:06.470] This is the reset password section. [12:06.470 --> 12:08.490] And I get the OTP, just reset the password. [12:08.490 --> 12:12.150] And I found the man called James Konda. [12:12.650 --> 12:15.250] And there's a live order inside this account. [12:15.250 --> 12:17.330] So I said, order in it. [12:17.330 --> 12:21.850] And also saved credit card information and the address information. [12:21.850 --> 12:22.790] Everything you need. [12:22.790 --> 12:24.070] Just a live. [12:25.590 --> 12:32.170] And about statistics, nearly 18,000 mail. [12:32.610 --> 12:36.890] Most of the emails come from TikTok, Intelliverse, and Supercell. [12:36.890 --> 12:40.550] However, as you can see, there are many other applications not listed there. [12:40.550 --> 12:44.010] As including them will require numerous slides. [12:44.010 --> 12:48.210] In summary, you can find all kind of accounts you want here. [12:50.810 --> 12:55.130] And in these days, every information is invaluable. [12:55.310 --> 13:02.550] And the software used by blue teams and cyber intelligence units for gathering information has now become highly advanced. [13:02.670 --> 13:15.610] And for example, if your password has been leaked on any dark website or a public forum, the websites just notify you about your password as leaked. [13:15.610 --> 13:16.670] Please change your password. [13:16.670 --> 13:21.610] Even some websites are not waiting for a permission and change your password. [13:21.710 --> 13:23.210] They generate a random password. [13:23.210 --> 13:27.810] And after that, they say to you, I changed your password because your password is leaked. [13:29.950 --> 13:37.130] And for my presentation, I wrote a Python script that's called Temple Mail Spy. [13:37.130 --> 13:41.410] It just continues to recording and monitoring Temple Mail services. [13:41.950 --> 13:44.950] And it can be used with the Telegram and Slack notification API. [13:44.950 --> 13:46.990] It's fully customizable config. [13:47.070 --> 13:50.070] And this has different modes. [13:50.430 --> 13:55.310] This script can get all mails or just grab for a specific keyword. [13:56.050 --> 14:02.330] For now, it's only using two mail services because these two are the most popular ones, Yelp Mail and TempMail. [14:02.330 --> 14:05.130] But I will add more in the future. [14:05.130 --> 14:10.670] Also, I will add proxy specification because some TempMail services has rate-limiting issues. [14:12.570 --> 14:15.190] And as you can see, there's a customize option. [14:15.190 --> 14:19.370] So, you just need to set a keyword here. [14:19.370 --> 14:20.910] So, what do you want to know? [14:20.910 --> 14:25.130] For example, Facebook or you want Amazon or maybe you are hunting Bitcoin wallets. [14:25.130 --> 14:30.770] You just enter a Bitcoin and my script is going to monitoring continuously. [14:30.770 --> 14:35.970] And if there's a mail that shows up like Bitcoin and you just grab the Bitcoin, [14:35.970 --> 14:38.610] they just notify you from Slack or Telegram immediately. [14:38.610 --> 14:41.610] There's an email here you can find. [14:42.310 --> 14:45.490] So, these are the notification sections. [14:46.730 --> 14:55.910] After the script is over, it saves you what the mails save you as output. [14:55.910 --> 15:04.730] Mail link, mail sender, which mail service, from which mail service, get that mail, etc. [15:06.250 --> 15:15.870] And now, I have an enjoyable and classified example about my presentation. [15:19.950 --> 15:26.010] And just a regular day, I finish my script and I just run my script. [15:26.010 --> 15:29.890] And my script just found an invoice, invoice link. [15:30.110 --> 15:33.090] And I go to invoice, you can see here. [15:33.510 --> 15:39.450] And in the invoice, in the left bottom, there's a PHP debugger icon. [15:39.450 --> 15:42.630] And after I click that icon, I found a debugging page. [15:42.630 --> 15:48.750] And I found some important credentials inside that one. [15:48.750 --> 15:51.030] And I found some endpoints. [15:51.610 --> 15:57.070] And I do more recon about the website. [15:57.070 --> 16:00.410] And I found a slash admin endpoints. [16:00.490 --> 16:07.530] And when I go there, also thanks to PHP debugger, I found a credential and I go to admin panel. [16:08.990 --> 16:16.570] So, can you imagine that some guy just uses a temporary mail service for his admin panel. [16:16.590 --> 16:21.490] So, I just enter the credential and it asks me OTP, but no problem. [16:21.490 --> 16:24.770] So, it's temporary mail. So, I got the OTP from the temporary mail. [16:25.070 --> 16:28.750] And I enter it and boom, I got the admin page. [16:28.750 --> 16:34.770] Only I looked the temporary mail service and I got some interesting websites admin page. [16:34.770 --> 16:44.150] Okay. And I recon more and I realized that nearly 95% of the employees are using temporary mail services. [16:44.150 --> 16:45.690] That's very interesting. [16:45.750 --> 16:48.590] Everyone has a temporary mail. Yeah. [16:49.190 --> 16:52.670] And also, this company has a client. [16:52.670 --> 16:55.710] And you know that also this client uses temporary mail services. [16:55.710 --> 16:59.310] So, they assign their clients a temporary mail. [16:59.310 --> 17:01.630] Wow. Nice privacy. [17:01.630 --> 17:06.910] And I recon more. I found server information in there. [17:06.910 --> 17:14.810] And I access the database and get more information from here. [17:14.810 --> 17:20.610] I found a mail username and password and API stuffs. [17:20.610 --> 17:24.130] And I, as you can see, there's a mail username and password here. [17:24.130 --> 17:30.730] And I just enter their mails live thanks to temporary mail services. [17:30.730 --> 17:36.130] There's a lot of important stuff going on there. [17:36.130 --> 17:43.050] For example, there's a Kenya export pronunciation and branding agencies. [17:43.050 --> 17:47.290] Classified information I found here. [17:47.290 --> 17:51.330] Some employee names, social security numbers, etc. [17:51.710 --> 17:56.610] Government papers here I found. [17:57.690 --> 18:00.570] I hope there's no FBI here or something. [18:01.330 --> 18:03.650] This is educational purpose only. [18:06.270 --> 18:10.170] And I use every user's information. [18:10.170 --> 18:13.350] Company uses information and mail addresses. [18:13.810 --> 18:16.710] And I go to some client's mails. [18:16.710 --> 18:19.050] And there's invoices, live invoices. [18:19.050 --> 18:21.390] Money is there. [18:21.390 --> 18:29.770] And somehow I get a shell from that educational purpose company. [18:32.290 --> 18:38.490] But you need to know that the relevant vulnerability has been reported to the company and has been remediated. [18:38.490 --> 18:44.350] And during this research, no actions were taken that would harm the company's service and disrupt their operations. [18:45.670 --> 18:48.670] And this is my shell. I'm passing this quick. [18:48.670 --> 18:50.710] A lot of websites in it. [18:50.770 --> 18:53.230] And every website is a different database. [18:53.290 --> 18:55.650] As you can see, this is live. [18:56.010 --> 18:58.610] Different environments, lots of information. [18:58.610 --> 19:00.950] Database names, database passwords. [19:01.310 --> 19:07.150] Also, JVT secrets and SSL case. [19:07.150 --> 19:08.110] Everything. [19:08.790 --> 19:11.690] More password, email name. [19:12.210 --> 19:13.670] More temporary mail service. [19:13.670 --> 19:15.890] Because everyone is using temporary mail service. [19:15.890 --> 19:20.810] And I find someone in the database using another temporary mail service. [19:20.810 --> 19:21.890] And I go there. [19:21.890 --> 19:22.930] I get his account. [19:22.930 --> 19:24.230] And I get a different website. [19:24.230 --> 19:26.810] I just go to another admin panel. [19:26.810 --> 19:29.110] I go to a different website. [19:29.170 --> 19:31.870] Because everyone uses temporary mail service. [19:32.850 --> 19:33.610] Yeah. [19:33.610 --> 19:39.830] And this one is also another website that I found from the database. [19:40.870 --> 19:43.070] And more logging applications. [19:43.070 --> 19:44.230] This one is also different. [19:44.230 --> 19:46.070] More tracking caches. [19:46.350 --> 19:48.310] More information here. [19:48.310 --> 19:51.930] There's also email username and password in it. [19:51.930 --> 19:54.550] So, more emails. [19:54.550 --> 19:57.390] More good stuff. [19:58.130 --> 19:59.510] Payment links. [19:59.510 --> 20:01.030] There's a live payment link. [20:01.030 --> 20:02.410] Payment transactions. [20:03.170 --> 20:04.930] API keys. [20:05.210 --> 20:07.110] PayPal secrets. [20:07.110 --> 20:08.330] Everything. [20:08.350 --> 20:10.330] Credit card numbers. [20:10.330 --> 20:17.590] And I just get this from just looking around some kind of temporary mail service called Yelp mail. [20:17.590 --> 20:18.710] And I just found an invoice. [20:18.710 --> 20:20.670] And this comes to here. [20:20.690 --> 20:22.490] So, it's very interesting. [20:22.970 --> 20:24.290] And more information. [20:24.290 --> 20:26.750] See, I'm passing this fast. [20:26.930 --> 20:29.150] More tracking caches. [20:29.150 --> 20:31.750] And more temporary mail service. [20:31.750 --> 20:36.090] And now I'm in a conclusion in this research. [20:36.770 --> 20:39.390] I obtained hundreds of personal accounts. [20:39.390 --> 20:41.150] Shopping accounts with money inside. [20:41.150 --> 20:42.350] Patient information. [20:42.350 --> 20:43.390] IP details. [20:43.390 --> 20:44.130] Premium accounts. [20:44.130 --> 20:45.510] Company information. [20:45.510 --> 20:47.170] Company accounts. [20:47.170 --> 20:48.330] Compromised accounts. [20:48.330 --> 20:50.030] Compromised email accounts. [20:50.030 --> 20:51.270] Credit card information. [20:51.270 --> 20:53.750] Dozens of web applications. [20:53.750 --> 20:56.210] Numerous databases containing live data. [20:56.210 --> 20:59.150] Private and confidential API keys. [20:59.190 --> 21:00.710] Passwords. [21:00.910 --> 21:03.190] A little government document. [21:03.470 --> 21:04.970] Email correspondences. [21:04.970 --> 21:07.050] Secret payment system APIs. [21:07.290 --> 21:09.070] Company bank accounts. [21:09.070 --> 21:10.910] And SMS sending APIs. [21:11.250 --> 21:13.230] Customer accounts with money in them. [21:13.230 --> 21:15.170] And maybe more things in this. [21:15.170 --> 21:17.450] But, I don't know. [21:17.450 --> 21:20.110] I just report to them. [21:20.110 --> 21:23.650] And I just finish the shell part. [21:24.010 --> 21:25.610] Everything is remediated. [21:25.610 --> 21:27.240] And there's a bonus part here. [21:28.000 --> 21:32.440] So, I think maybe... [21:32.440 --> 21:34.260] I'm looking for this... [21:34.260 --> 21:37.060] I'm hunting this account. [21:37.060 --> 21:40.880] And maybe there's more guys like me who are hunting this service. [21:40.880 --> 21:46.440] So, I think that maybe I can create a phishing email for them. [21:47.020 --> 21:47.920] Something like... [21:47.920 --> 21:52.380] You can look your Bitcoin account here. [21:52.380 --> 21:56.640] And I just write a BBC script here. [21:57.640 --> 22:00.760] That's inside an Excel. [22:00.760 --> 22:02.520] There's a macro in it. [22:02.520 --> 22:04.970] And when someone opens that macro and allows... [22:05.220 --> 22:07.640] Opens the Excel and allows the macro... [22:08.240 --> 22:16.560] This script is just getting some environmental informations to my server. [22:16.560 --> 22:19.740] And I have a domain called moobitcoin.com. [22:19.740 --> 22:22.060] I just get domain for research purpose. [22:22.060 --> 22:30.140] I'm saying that because I signed some papers that I bought from this domain. [22:30.140 --> 22:33.020] Because they banned me in the first. [22:33.100 --> 22:35.820] And I said, hey, I'm just using this for research purpose. [22:35.820 --> 22:38.120] They sent me a paper and please sign. [22:38.120 --> 22:39.440] Okay, I sign. [22:39.620 --> 22:42.800] I'm not getting any credit card information from it. [22:42.800 --> 22:49.040] I'm just getting some, for example, hostname, username, and external IP, internal IP, etc. [22:49.840 --> 22:52.560] And then I create a phishing template. [22:52.560 --> 22:53.940] So these are the addresses. [22:53.940 --> 22:56.020] And as you know, these are the temporary mail addresses. [22:56.020 --> 22:58.000] The most used ones. [22:58.160 --> 23:01.140] Because, as I said, people are lazy. [23:01.140 --> 23:02.920] And they just press A or B. [23:02.920 --> 23:05.600] They just don't write their names. [23:05.620 --> 23:08.020] For example, I'm not writing my name. [23:08.020 --> 23:10.960] I just press A and look for the inbox. [23:10.960 --> 23:13.740] So I just put these ones, seven ones. [23:13.900 --> 23:17.580] And I create an example email template here. [23:17.580 --> 23:18.520] For example, hi, James. [23:18.520 --> 23:21.600] Thanks for buying blah, blah, blah Bitcoin from here. [23:21.600 --> 23:23.760] Your final balance here, please. [23:23.880 --> 23:27.840] We change your password for security purpose because you buy a Bitcoin. [23:27.840 --> 23:33.240] And you can find these credentials inside Excel file. [23:33.240 --> 23:35.500] And I zip that Excel. [23:35.740 --> 23:39.360] Because maybe there's a spam filter in here. [23:39.360 --> 23:42.840] And some spam filter just opens Excel. [23:43.100 --> 23:45.040] And look at the documents inside it. [23:45.040 --> 23:46.100] I know that. [23:46.100 --> 23:49.020] And because of that, I just password the Excel. [23:49.020 --> 23:51.480] And I write the PDF password to mail. [23:51.760 --> 23:53.260] Maybe. Why not? [23:53.600 --> 23:56.040] As you can see, there's an accountcredentials.zip. [23:56.100 --> 23:57.520] There's an attachment. [23:58.300 --> 23:59.500] And I send it. [23:59.500 --> 24:02.500] And it's just delivered. [24:02.500 --> 24:03.580] No spam. [24:03.580 --> 24:05.600] This does not look like a spam. [24:05.980 --> 24:13.340] And also, the other temporary mail services accepted this mail. [24:13.660 --> 24:15.200] So there's no spam. [24:15.200 --> 24:16.560] No spam filter is working. [24:16.780 --> 24:21.900] As I said in my previous slides, no spam filter is working. [24:21.900 --> 24:25.360] So don't believe everything you see in this mail services. [24:26.180 --> 24:26.820] Just... [24:26.820 --> 24:32.280] If there's something free, just don't click that one so fast, please. [24:33.280 --> 24:40.420] And if someone just opens my Excel, this request comes to my server. [24:40.420 --> 24:47.700] And I get an information about what is user name or host name, internal IP and external IP, et cetera. [24:49.400 --> 24:51.320] And this is my end of presentation. [24:51.320 --> 24:52.600] Thank you for listening to me.