Date: Sun, 28 Nov 2021 10:16:25 +0100 From: Stefan Esser <se@freebsd.org> To: freebsd-hackers <freebsd-hackers@freebsd.org> Subject: Does not appear to be (too) malicious ... Message-ID: <b66c39a4-1836-eab8-db9f-e839d14b13be@freebsd.org> In-Reply-To: <CA%2ByoEx881o6frd-zy-rV55xR3vg%2BjugN0ZigdH8nAYGsB6_NfA@mail.gmail.com> References: <cd41bda5-6a14-c4e2-3d74-b0c5d52480ec@zohomail.com> <05580cd8-1bbf-8783-b190-40d9cdacade6@m5p.com> <CA%2ByoEx881o6frd-zy-rV55xR3vg%2BjugN0ZigdH8nAYGsB6_NfA@mail.gmail.com>
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This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --------------jJawxrU5A1eSOwo2T9I0TDz1 Content-Type: multipart/mixed; boundary="------------r89bkpw8tJuQV0dww9P5PQpt"; protected-headers="v1" From: Stefan Esser <se@freebsd.org> To: freebsd-hackers <freebsd-hackers@freebsd.org> Message-ID: <b66c39a4-1836-eab8-db9f-e839d14b13be@freebsd.org> Subject: Does not appear to be (too) malicious ... References: <cd41bda5-6a14-c4e2-3d74-b0c5d52480ec@zohomail.com> <05580cd8-1bbf-8783-b190-40d9cdacade6@m5p.com> <CA+yoEx881o6frd-zy-rV55xR3vg+jugN0ZigdH8nAYGsB6_NfA@mail.gmail.com> In-Reply-To: <CA+yoEx881o6frd-zy-rV55xR3vg+jugN0ZigdH8nAYGsB6_NfA@mail.gmail.com> --------------r89bkpw8tJuQV0dww9P5PQpt Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Am 28.11.21 um 02:06 schrieb Mario Lobo: > On Sat, Nov 27, 2021, 20:27 George Mitchell <george+freebsd@m5p.com> wr= ote: >=20 >> On 11/27/21 17:40, Obsto Clades via freebsd-hackers wrote: >>> I hacked on the FreeBSD source code to produce a version of the OS th= at >>> cannot be remotely hacked. Before you tell me that is impossible, I >>> have an answer to that response on my FAQ page. >>> >>> If you are interested in checking out my OS, you can find instruction= s >>> on my site's home page: https://obstoclades.tech/ >>> >>> I invite you to check it out. >>> >> >> Hmm, my mother told me never to click on links in strange emails ... >> -- George >> >=20 > curl http://obstoclades.tech [...] > <p class=3D"red">Connection denied by Geolocation Setting.</p> > <p><b> Reason: </b> Blocked country: <font color=3D"red"> </fon= t> </p> > <p>The connection was denied because this country is blocked in = the > Geolocation settings.</p> > <p>Please contact your administrator for assistance.</p> > </div> > <div class=3D"band">WatchGuard Technologies, Inc.</div> > </div> > </body> > </html> $ fetch --no-verify-peer -v -o /tmp/obstoclades.html https://obstoclades.= tech resolving server address: obstoclades.tech:443 SSL options: 82004854 Verify hostname TLSv1.3 connection established using TLS_AES_256_GCM_SHA384 Certificate subject: /CN=3Dobstoclades.tech Certificate issuer: /C=3DUS/O=3DLet's Encrypt/CN=3DR3 requesting https://obstoclades.tech/ fetch: https://obstoclades.tech: size of remote file is not known local size / mtime: 34916 / 1638088913 /tmp/obstoclades.html 34 kB 181 kBps 00s There is actual contents in this file, and it does not seem to contain an= y malicious parts. It starts with: <!DOCTYPE html> <!-- File: ObstoClades.html Copyright (c) 2021 Obsto Clades, LLC --> <html lang=3D"en"> <head> <meta charset=3D"UTF-8"> <title>Security is a Joke</title> <meta name=3D"description" content=3D"This demonstrates a modified BSD Operating System de= signed to prevent remote hacking of single-purpose computer systems."> <link rel=3D"stylesheet" type=3D"text/css" href=3D"/css/obstoclades.c= ss"/> <link rel=3D"icon" type=3D"image/x-icon" href=3D"/favicon.ico"/> <script src=3D"https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js">= </script> <script src=3D"js/obstoclades.js" defer=3D"defer"></script> </head> And besides the jquery.min.js dowloaded from ajax.googleapis.com only the= following short and apparently benign script is downloaded as obstoclades= =2Ejs: /* * File: obstoclades.js * Copyright (c) 2017 Obsto Clades, LLC */ $(document).ready(function() { var $content =3D $(".content").hide(); $(".img").on("click", function (e) { $(this).parent().parent().toggleClass("expanded"); var ttt =3D $(this).parent().children(".tooltiptext"); if ($(this).parent().parent().hasClass("expanded")) { ttt.replaceWith("<span class=3D\"tooltiptext\">Click to close</span>"); } else { ttt.replaceWith("<span class=3D\"tooltiptext\">Click to open</span>"); } $(this).parent().parent().next().slideToggle(); }); var textHeight =3D $("#left-side-header-text").height(); $("#old_english_sheepdog").height(textHeight).width(textHeight); $("#button").click(function() { $("#contactus-form").submit(); }) }); He invites to attack his server using a SSH login with provided credentia= ls, and offers US$1000 for any successful modification of the test server. Se= e the following video, which shows that root on the consonle and root via s= u in the SSH session get quite different environments: https://obstoclades.tech/video/demo-video.mp4 This looks like a setup with lots of restrictions applied, probably noexe= c mounts of temporary file systems and the like, possibly jails and/or MAC restrictions. He thinks that an embedded system configured that way could not be attack= ed, but explains that his concept is limited to e.g. IoT use cases (what he calls "single-purpose computer system"). Anyway, I could not find any malicious content on the web server. Accessi= ng with a SSH session (obviously configured to not allow backwards tunneling= ) should also not be too dangerous from a dumb terminal (but beware of esca= pe sequence attacks possible with ANSI terminals, e.g. reprogramming of func= tion keys with "ESC[code;string;...p"). It looks to me like kind of a honeypot setup gathering attack attempts to= see whether a throw-away system can withstand them. All attack attempts a= re logged, either to learn how to perform them, or to actually improve the security of his protection concept in case of a successful break-in. Regards, STefan --------------r89bkpw8tJuQV0dww9P5PQpt-- --------------jJawxrU5A1eSOwo2T9I0TDz1 Content-Type: application/pgp-signature; name="OpenPGP_signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="OpenPGP_signature" -----BEGIN PGP SIGNATURE----- wsB5BAABCAAjFiEEo3HqZZwL7MgrcVMTR+u171r99UQFAmGjSOkFAwAAAAAACgkQR+u171r99UQ3 Wwf8Dk21TWeuXp++0S2nN41g9aATwGvAdujX9WXQLRTEVYPufzLULK3uJcexbzlBIS4/oOrcVaMD A0PpJx5XBd7GhnijkfPGal1fE3D/rJmnFwE70U8PYbc/9YsR8yVZcZIoLixDZtu5/dqEhhkRRk9K WkCNg8+l/I/eUEA1UpU1xBfgw2GOQC9rlCMdxqVWodS+yUP/V3w43sOPXbOwdxOlwBsZaBABZhXD mw+v7t/ocQeNGmd1575sTKuNds+GETIrrDfUrVulhrYMCbgzhdQZ5yZRNWNhzNudu6CD9z+QEqRS tHdNxm5EUUtBL4QnOxUY0UpZ3t7ZUceKFFGRIhJ/QA== =KTD3 -----END PGP SIGNATURE----- --------------jJawxrU5A1eSOwo2T9I0TDz1--
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