#BadWinmail: The "Enterprise Killer" Attack Vector in Microsoft Outlook

[Haifei Li <haifei-non-reply () outlook com>]

Hi All,
I have released a paper & demo describing a novel/serious attack vector I discovered in Microsoft Outlook.
Paper: https://sites.google.com/site/zerodayresearch/BadWinmail.pdfDemo: https://www.youtube.com/watch?v=ngWVbcLDPm8
Reference:https://technet.microsoft.com/en-us/library/security/ms15-131.aspxhttp://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-6172
--ConclusionIn this report, the author disclosed a novel attack vector to attack Outlook users via emails, which 
theauthor named as BadWinmail. Specifically, we disclosed that a Flash (or other types of) exploit can bepacked and 
delivered via a TNEF email (or MSG attachment). The most serious impact is that the exploitwill get executed as long as 
the Outlook user reads/previews the attacking email. Because there is nosandbox on Outlook, it allows the attacker to 
take control of the victim’s computer immediately.
BadWinmail is an ideal attacking technique for targeted/APT attacks because of its severity and thenature of 
email-based attacks - all the attacker needs to know is the victim’s email address. It’s a “killer”exploit-delivering 
method as usual tricks such as delivering via email attachments or delivering via URLs(in email bodies) require 
additional user interactions and are protected by various applicationsandboxes. It’s also a wormable issue rarely seen 
on Windows platform nowadays.--
Thanks,Haifei                                     

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