Massive potential pushback from mgmt on manual review. Just sayin'. On Fri, Oct 6, 2017 at 11:51 AM, Kurt Buff <[email protected]> wrote:
> Quarantine all PDFs for the time being, and manually review. > > Implement strict SPF checking - reject any that fail. > > Investigate implementing DMARC. > > Kurt > > On Fri, Oct 6, 2017 at 7:00 AM, Rimmel, Carl <[email protected]> wrote: > > Yes, we use Proofpoint. It has done a great job and will quarantine > these messages once they get classified. We are dealing with very targeted > zero-day type PHISHing (our last round were messages composed to look like > they were sent by our CEO - with his signature and inline photo). The > payload was an attached PDF with the image having an embedded malicious URL. > > > > -----Original Message----- > > From: [email protected] [mailto:listsadmin@lists. > myitforum.com] On Behalf Of Kurt Buff > > Sent: Thursday, October 05, 2017 11:18 AM > > To: [email protected] > > Subject: Re: [Exchange] PDF Spam > > > > No external spam filter? With quarantine? > > > > Kurt > > > > On Thu, Oct 5, 2017 at 7:55 AM, Rimmel, Carl <[email protected]> wrote: > >> We have been seeing an uptick in SPAM containing PDF attachments. The > >> PDFs are composed of a full-page image that, when moused-over, points > >> to a malicious web site. We have tried to use Transport Rules to > >> block these based on the moused-over URL but Exchange seems unable to > >> properly detect these embedded URLs. We are able to use Transport > >> Rules to block PDFs with plain text so we know that the server is > inspecting them properly. > >> > >> > >> > >> Any ideas on how to battle these pesky messages? > > > > > > > > ________________________________ > > > > CONFIDENTIALITY NOTICE: This email contains information from the sender > that may be CONFIDENTIAL, LEGALLY PRIVILEGED, PROPRIETARY or otherwise > protected from disclosure. This email is intended for use only by the > person or entity to whom it is addressed. If you are not the intended > recipient, any use, disclosure, copying, distribution, printing, or any > action taken in reliance on the contents of this email, is strictly > prohibited. If you received this email in error, please contact the sending > party by reply email, delete the email from your computer system and shred > any paper copies. > > > > Note to Patients: There are a number of risks you should consider before > using e-mail to communicate with us. See our Privacy & Security page on > www.henryford.com for more detailed information as well as information > concerning MyChart, our new patient portal. If you do not believe that our > policy gives you the privacy and security protection you need, do not send > e-mail or Internet communications to us. > > >
