Phishing Sophistication

 General, Technology  Comments Off on Phishing Sophistication
Jan 052006
 

I’m start­ing to be impressed by the (almost) soph­ist­ic­a­tion of phish­ing attempts. The latest one in my inbox today con­tained a mes­sage from someone pur­port­ing to have bought an item via eBay that they had­n’t received and unless they heard back they were going to com­plain to eBay and then the police — I can quite see some nervous seller who thinks there might be a mis­take in the sys­tem click­ing on the “log in to eBay mes­sage cen­ter” link (which of course does­n’t go to eBay at all) to try to rec­ti­fy it. 

Mind you, the spam fil­ters are also start­ing to become soph­ist­ic­ated — my ISP adds head­ers to the email mark­ing poten­tial spam and this one tripped a num­ber of meters, adding up to quite a lot of red flags. Some of them are, on their own, quite legit­im­ate of course, but not all:

    1.0 FROM_ENDS_IN_NUMS      
        From: ends in numbers
    1.3 RCVD_NUMERIC_HELO      
        Received: contains a numeric HELO
    1.0 MSGID_SPAM_CAPS        
        Message-ID =~ /^\s*< ?[A-Z]+\@(?!(?:mailcity|whowhere)\.com)/
    0.1 HTML_TAG_EXISTS_TBODY  
        BODY: HTML has "tbody" tag
    0.4 HTML_70_80             
        BODY: Message is 70% to 80% HTML
    0.1 HTML_FONTCOLOR_BLUE    
        BODY: HTML font color is blue
    0.7 MIME_HTML_ONLY         
        BODY: Message only has text/html MIME parts
    0.2 HTML_MESSAGE           
        BODY: HTML included in message
     0.3 HTML_FONT_BIG          
        BODY: HTML has a big font
    1.1 MIME_HTML_NO_CHARSET   
        RAW: Message text in HTML without charset
    0.2 MIME_QP_LONG_LINE      
        RAW: Quoted-printable line longer than 76 chars
    0.4 NORMAL_HTTP_TO_IP      
        URI: Uses a dotted-decimal IP address in URL
    0.1 FORGED_HOTMAIL_RCVD2   
        hotmail.com 'From' address, but no 'Received:'
    3.0 FORGED_MUA_OUTLOOK     
        Forged mail pretending to be from MS Outlook
    0.6 MISSING_MIMEOLE        
        Message has X-MSMail-Priority, but no X-MimeOLE
    1.1 FORGED_OUTLOOK_HTML    
        Outlook can't send HTML message only
    1.1 MIME_HTML_ONLY_MULTI   
        Multipart message only has text/html MIME parts
    1.1 FORGED_OUTLOOK_TAGS    
        Outlook can't send HTML in this format
    3.0 SARE_MSGID_YAHOO       
        Message-ID is forged, (yahoo.com)
    1.1 HTML_MIME_NO_HTML_TAG  
        HTML-only message, but there is no HTML tag

After I saw this I promptly went and got the latest ver­sion of Pegas­us Mail, which I use for my per­son­al email. Pegas­us has always had good anti-vir­us pro­tec­tion, has had decent spam fil­ter­ing for some time, and shows the real URL that is being linked to on HTML emails, but it now advert­ises anti-phish­ing checks as well. It will be inter­est­ing to see how well they work in practise. 

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