Re: Spike in O365 risky "unfamiliar" sign-ins?

["Turnbull, Colin" <cturnbull () EWU EDU>]

Possibly unrelated but if you subscribe to the haveibeenpwned domain 
search, you may want to compare the accounts with those listed in the 
Chegg data breach. We're seeing a run on those accounts being tested. 
This includes the use of the MS address space with a South Korea 
geolocation.

Colin Turnbull
Sr Manager InfoSec Services & CISO
Information Technology
cturnbull () ewu edu | 509.359.4985

On 9/13/19 8:28 AM, Jim A. Bole wrote:
> Many thanks for the quick confirmation.
>
> We had a scary start to this Friday the 13^th .
>
> Jim
>
> *From:* The EDUCAUSE Security Community Group Listserv 
> <SECURITY () LISTSERV EDUCAUSE EDU> *On Behalf Of *Hart, Michael
> *Sent:* Friday, September 13, 2019 10:40 AM
> *To:* SECURITY () LISTSERV EDUCAUSE EDU
> *Subject:* Re: Spike in O365 risky "unfamiliar" sign-ins?
>
> Yep.  Same here.  I’m going to be working with my team to create a good 
> run book for these events.  A fair percentage need to be filtered out, 
> and we need to find a good way of determining the validity of an alert.  
> As an example, I have a faculty member who showed an alert for logging 
> in from South Korea this morning.  I don’t know off-hand if she’s 
> travelling and this is legit, or if her account is compromised.  We’ll 
> need to figure out how to do a reasonably fast investigation for these 
> events.  I obviously can’t just email the individuals, as someone could 
> be intercepting the emails.
>
> If anyone has good O365 runbooks, I would appreciate a discussion.
>
> *Mike Hart  | CISO, Director of ITS Security, Infrastructure, and 
> Networking*
> *Metropolitan State University of Denver
> Information Technology Services*
> Campus Box 96, P.O. Box 173362, Denver, CO 80217-3362
> Admin Building - 1201 5^th  Street 480E  Denver, CO 80204
> 303-615-0541 (Office)
> 303-352-7548 (Help Desk)
> mhart20 () msudenver edu <mailto:mhart20 () msudenver edu> | 
> www.msudenver.edu/technology 
> <https://nam04.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.msudenver.edu%2Ftechnology&data=02%7C01%7Cjbole%40STEVENSON.EDU%7C06512974ec10432cb19908d738585434%7C93599c7168554022bac5141d808346d1%7C0%7C0%7C637039824335954433&sdata=d2H4yIBmp5vKnFj%2BW0snML4H6F%2FAwAPxO1Yr94GQMZY%3D&reserved=0>
>
> University_Formal_2CPos184x
>
> *From:* The EDUCAUSE Security Community Group Listserv 
> <SECURITY () LISTSERV EDUCAUSE EDU <mailto:SECURITY () LISTSERV EDUCAUSE EDU>> 
> *On Behalf Of *Jim A. Bole
> *Sent:* Friday, September 13, 2019 8:25 AM
> *To:* SECURITY () LISTSERV EDUCAUSE EDU <mailto:SECURITY () LISTSERV EDUCAUSE EDU>
> *Subject:* [SECURITY] Spike in O365 risky "unfamiliar" sign-ins?
>
> In the past 24 hours we saw a spike in “unfamiliar” sign-in alerts on 
> our O365 tenant.
>
> We are still investigating, but we have some indications in might be due 
> to Microsoft’s recent change in their algorithm:
>
> https://techcommunity.microsoft.com/t5/Azure-Active-Directory-Identity/Presenting-the-new-Unfamiliar-Sign-in-Properties/ba-p/779978
>  
> <https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2FAzure-Active-Directory-Identity%2FPresenting-the-new-Unfamiliar-Sign-in-Properties%2Fba-p%2F779978&data=02%7C01%7Cjbole%40STEVENSON.EDU%7C06512974ec10432cb19908d738585434%7C93599c7168554022bac5141d808346d1%7C0%7C0%7C637039824335954433&sdata=07fnjQd5VQ3xyITtK%2F7R8s8BMAF8kfK6%2FnjVy8mkuqI%3D&reserved=0>
>
> Is anyone else seeing this?
>
> Jim Bole
>
> Director of Information Security
>
> *Stevenson University*
>
> 1525 Greenspring Valley Road
>
> Stevenson, MD, 21153-0641
>
> jbole () stevenson edu <mailto:jbole () stevenson edu> | O: 443-334-2696
>
> **********
> Replies to EDUCAUSE Community Group emails are sent to the entire 
> community list. If you want to reply only to the person who sent the 
> message, copy and paste their email address and forward the email reply. 
> Additional participation and subscription information can be found at 
> https://www.educause.edu/community 
> <https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.educause.edu%2Fcommunity&data=02%7C01%7Cjbole%40STEVENSON.EDU%7C06512974ec10432cb19908d738585434%7C93599c7168554022bac5141d808346d1%7C0%7C0%7C637039824335964424&sdata=bS%2Bdt2Ueb6jlfjFdHovFNJO8PFbN%2F%2FwdL1X7o5QIMbA%3D&reserved=0>
>  
>
>
> **********
> Replies to EDUCAUSE Community Group emails are sent to the entire 
> community list. If you want to reply only to the person who sent the 
> message, copy and paste their email address and forward the email reply. 
> Additional participation and subscription information can be found at 
> https://www.educause.edu/community

**********
Replies to EDUCAUSE Community Group emails are sent to the entire community list. If you want to reply only to the 
person who sent the message, copy and paste their email address and forward the email reply. Additional participation 
and subscription information can be found at https://www.educause.edu/community