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hacking on XP part 3

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					How to Forge Email with Windows XP Telnet
Want a computer you can telnet into and mess around with, and not get into trouble no matter what you do to it? I've set up my techbroker.com (206.61.52.33) with user xyz, password guest for you to play with. Here's how to forge email to xyz@techbroker.com using telnet. Start with the command: C:\>telnet techbroker.com 25 Connecting To Techbroker.com 220 <techbroker.com> Service ready Now you type in who you want the message to appear to come from: helo santa@techbroker.com Techbroker.com will answer: 250 <techbroker.com> host ready Next type in your mail from address: mail from:santa@techbroker.com 250 Requested mail action okay, completed Your next command: rcpt to:xyz@techbroker.com 250 Requested mail action okay, completed Your next command: data 354 Start main input; end with <CRLF>.<CRLF> Newbie note: <CRLF> just means hit return. In case you can't see that little period between the <CRLF>s, what you do to end composing your email is to hit enter, type a period, then hit enter again. Anyhow, try typing: This is a test. . 250 Requested mail action okay, completed quit 221 <techbroker.com> Service closing transmission channel Connection to host lost. Using techbroker's mail server, even if you enable full headers, the message we just composed looks like:

Status: R X-status: N This is a test. That's a pretty pathetic forged email, huh? No "from", no date. However, you can make your headers better by using a trick with the data command. After you give it, you can insert as many headers as you choose. The trick is easier to show than explain: 220 <techbroker.com> Service ready helo santa@northpole.org 250 <techbroker.com> host ready mail from:santa@northpole.com 250 Requested mail action okay, completed rcpt to:<script language="JavaScript"><!-- var name = "cmeinel"; var domain = "techbroker.com"; document.write('<a href=\"mailto:' + name + '@' + domain + '\">'); document.write(name + '@' + domain + '</a>'); // --></script> 250 Requested mail action okay, completed data 354 Start main input; end with <CRLF>.<CRLF> from:santa@deer.northpole.org Date: Mon, 21 Oct 2002 10:09:16 -0500 Subject: Rudolf This is a Santa test. . 250 Requested mail action okay, completed quit 221 <techbroker.com> Service closing transmission channel Connection to host lost. The message then looks like: from:santa@deer.northpole.org Date: Mon, 21 Oct 2002 10:09:16 -0500 Subject: Rudolf This is a Santa test. The trick is to start each line you want in the headers with one word followed by a colon, and the a line followed by "return". As soon as you write a line that doesn't begin this way, the rest of what you type goes into the body of the email. Notice that the santa@northpole.com from the "mail from:" command didn't show up in the header. Some mail servers would show both "from" addresses. You can forge email on techbroker.com within one strict limitation. Your email has to go to someone at techbroker.com. If you can find any way to send email to someone outside techbroker, let us know, because you will have broken our security, muhahaha!

Don't worry, you have my permission. Next, you can read the email you forge on techbroker.com via telnet: C:\>telnet techbroker.com 110 +OK <30961.5910984301@techbroker.com> service ready Give this command: user xyz +OK user is known Then type in this: pass test +OK mail drop has 2 message(s) retr 1 +OK message follows This is a test. If you want to know all possible commands, give this command: help +OK help list follows USER user PASS password STAT LIST [message] RETR message DELE message NOOP RSET QUIT APOP user md5 TOP message lines UIDL [message] HELP Unless you use a weird online provider like AOL, you can use these same tricks to send and receive your own email. Or you can forge email to a friend by telnetting to his or her online provider's email sending computer(s).


				
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