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Out-Of-Office Messages Are a Security Risk

lonesysadmin.net

31–40 of 93 posts

Re: Out-Of-Office Messages Are a Security Risk

#31
I fail to see how being out of office and not responding to work email has any relevance to a person not recognizing when their bank accounts are being zeroed. I also fail to see the vector by which someone being out of office gives an attacker access to their bank accounts.

Re: Out-Of-Office Messages Are a Security Risk

#32
post #25

Earlier quoted context omitted.

I agree absolutely. It's similar to previous companies I've worked at that do phishing test emails for all their employees (usually at 9am on a Monday). There's little evidence it works, it is security theater and generally harms productivity. Knowing when not to bother people about security can be really helpful.

Followed immediately by HR sending an unsigned email about critical deadlines for benefits or something, telling you to click a link and/or a PDF attachment.

The most obvious phishing email I ever received was from some random domain informing me I had not take the required anti-phishing tracking and to please click the link to take it. Like a good employee, I sent the email to our spam@ account and didn't give it any more thought. A month later, my manager comes in and informs me that the anti-phishing training is not optional and I had a week to complete it.

Re: Out-Of-Office Messages Are a Security Risk

#33
post #7

As always with security the first thing to ask is "What is your threat model?" This person's threat model seems to be people who email him for a legitimate business reason, but see that he's away & take the opportunity to attack him? I just don't buy it - I think there is nothing wrong with always setting an autoresponder.

Yeah, this is a stretch... I'm getting pretty tired of this kind of thing. It's pretty clear to me that the infosec industry (within appsec and netsec at least, not risk and compliance) is bifurcated into two distinct groups. The first group consists of people who have real technical expertise, find serious vulnerabilities and make concrete suggestions about legitimate issues. The second group, and the one I see more…

Absolutely couldn’t agree more.

Re: Out-Of-Office Messages Are a Security Risk

#36
post #28

Earlier quoted context omitted.

Followed immediately by HR sending an unsigned email about critical deadlines for benefits or something, telling you to click a link and/or a PDF attachment.

So the real issue here is not emails or autoresponders, but lack of IT security knowledge among employees. Hence, do (mandatory) trainings or something.

I'm not sure there's much evidence that it works though. Probably more effective is having employees use yubikeys or something.

Re: Out-Of-Office Messages Are a Security Risk

#37
post #7

As always with security the first thing to ask is "What is your threat model?" This person's threat model seems to be people who email him for a legitimate business reason, but see that he's away & take the opportunity to attack him? I just don't buy it - I think there is nothing wrong with always setting an autoresponder.

This is an interesting discussion. I can see the author's point - maybe, as a thought experiment, an attacker could latch onto the fact that someone is out of the office and use that as a wedge.

Along the lines of "John and I had a payment planned, but he's out of the office, can you send it to [fake destination]?"

But, like other people have noted, you also have to weigh the chance of that happening in real life. It seems like the amount of planning on the attacker's part would be significant enough that if they could pull it off, they would have found easier targets by then.

Re: Out-Of-Office Messages Are a Security Risk

#39
post #25

Earlier quoted context omitted.

I agree absolutely. It's similar to previous companies I've worked at that do phishing test emails for all their employees (usually at 9am on a Monday). There's little evidence it works, it is security theater and generally harms productivity. Knowing when not to bother people about security can be really helpful.

Followed immediately by HR sending an unsigned email about critical deadlines for benefits or something, telling you to click a link and/or a PDF attachment.

In my company a lot of systems like HR have gone from internal servers to cloud so E-mails come from a lot of different URLs as sender. I consider myself pretty savvy but if a mail looks halfways plausible I don't really know how to tell if it's legitimate or not. The only way to fix this would be to sign E-mails so we can verify authenticity.

I think it shouldn't be too hard to write an Outlook plugin to do this.

Re: Out-Of-Office Messages Are a Security Risk

#40
post #25
post #14

Stuff like this is what keeps organizations from taking corpsec guidance seriously. Whatever the infinitesimal risk you accept by setting an autoresponder, it's dwarfed by the risk of convincing the rest of your team that you're a crank, and that what you have to say about phishing and email attachments isn't to be taken seriously.

I agree absolutely. It's similar to previous companies I've worked at that do phishing test emails for all their employees (usually at 9am on a Monday). There's little evidence it works, it is security theater and generally harms productivity. Knowing when not to bother people about security can be really helpful.

I've watched phishing exercise emails work (where by "work" I mean "marked increase in reports of real phishing attempts"), so I'm not sure that's the best example of theatrical corpsec practices.
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