Re: Chegg Data Breach notification (Thanks to HIBP)

[Matt Armstrong <marmstrong () MASTERS EDU>]

Robert,

I’ve been working with the HIBP Domain Search exports, pulling down the JSON and manipulating the data with PowerShell. 
That allows me to do most of the things I could do with the API without paying for it. That said, it’s cheap, so it 
wouldn’t be a big deal to work with the API either.

Most recently, I was able to pull a list of everyone from our organization from the Chegg breach with a small 
PowerShell one-liner and export it to a CSV. I’m sure there’s more that can be done, but I think it would generally be 
similar to what you can do with the API. Essentially, with the export, all the data is there, it’s just a matter of 
parsing it.

Matt Armstrong
Infrastructure Support Engineer
The Master’s University

From: The EDUCAUSE Security Community Group Listserv <SECURITY () LISTSERV EDUCAUSE EDU> On Behalf Of Barton, Robert W.
Sent: Tuesday, September 24, 2019 12:15 PM
To: SECURITY () LISTSERV EDUCAUSE EDU
Subject: Re: [SECURITY] Chegg Data Breach notification (Thanks to HIBP)

A slight tangent…anybody using the HIBP API?  What have you done with it?  We’re looking at now and just starting to 
test with it.

Robert W. Barton
Executive Director of Information Security and Policy
Lewis University
One University Parkway
Romeoville, IL  60446-2200
815-836-5663

From: The EDUCAUSE Security Community Group Listserv <SECURITY () LISTSERV EDUCAUSE EDU<mailto:SECURITY () LISTSERV 
EDUCAUSE EDU>> On Behalf Of John McCabe
Sent: Tuesday, September 24, 2019 1:25 PM
To: SECURITY () LISTSERV EDUCAUSE EDU<mailto:SECURITY () LISTSERV EDUCAUSE EDU>
Subject: Re: [SECURITY] Chegg Data Breach notification (Thanks to HIBP)

I'm continually tracking down compromised accounts at my institution. We use G Suite and regularly get alerts of 
suspicious behavior. Sometimes the suspicious alert is a false positive. I do my best to detect false negatives though 
as that's where my visibility can be at zero for a given set of compromised accounts.

If you're looking for compromised accounts that your managed threat service missed...

Some of the recent compromised accounts are used to register 
teamviewer.com<https://nam03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fteamviewer.com&data=02%7C01%7Cmarmstrong%40MASTERS.EDU%7Ce0a07c50e2f24bbe217d08d74123885f%7Cae8eae2dc0f643689e902c0bda55e80e%7C0%7C0%7C637049493189259736&sdata=th5uAN0d1TKtglJ90rO5jzxwPxuFj%2BpWjURTZAVPIdA%3D&reserved=0>
 accounts. Look for emails from service-noreply () teamviewer com<mailto:service-noreply () teamviewer com> where the 
subject is

TeamViewer帐户 - 电子邮件确认

. I've reported the accounts to 
teamviewer.com<https://nam03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fteamviewer.com&data=02%7C01%7Cmarmstrong%40MASTERS.EDU%7Ce0a07c50e2f24bbe217d08d74123885f%7Cae8eae2dc0f643689e902c0bda55e80e%7C0%7C0%7C637049493189259736&sdata=th5uAN0d1TKtglJ90rO5jzxwPxuFj%2BpWjURTZAVPIdA%3D&reserved=0>
 using 
https://content.teamviewer.com/en/report-a-scam/<https://nam03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fcontent.teamviewer.com%2Fen%2Freport-a-scam%2F&data=02%7C01%7Cmarmstrong%40MASTERS.EDU%7Ce0a07c50e2f24bbe217d08d74123885f%7Cae8eae2dc0f643689e902c0bda55e80e%7C0%7C0%7C637049493189269723&sdata=xdCv2RRkURIGF%2FwEBhx9Ffg2BHhbZJNH5pGGbn0HADI%3D&reserved=0>
 which is really not meant for this purpose. If anyone has a better contact please share.

Separately I've noticed some of the compromised accounts have joined a botnet and have done so using a method that is 
not new. The compromised account sends an email to a reasonable domain such as 
gmail.com<https://nam03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fgmail.com&data=02%7C01%7Cmarmstrong%40MASTERS.EDU%7Ce0a07c50e2f24bbe217d08d74123885f%7Cae8eae2dc0f643689e902c0bda55e80e%7C0%7C0%7C637049493189269723&sdata=BHB45Ul2d%2F7FaAew8ebXnHb0Oqpq5XR30igBVzmyVH8%3D&reserved=0>
 with a message that includes the email address, password and the SMTP server. If you can search over the message 
bodies (and your institution uses gmail) then try this string

,smtp.gmail.com:465<https://nam03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fsmtp.gmail.com%3A465&data=02%7C01%7Cmarmstrong%40MASTERS.EDU%7Ce0a07c50e2f24bbe217d08d74123885f%7Cae8eae2dc0f643689e902c0bda55e80e%7C0%7C0%7C637049493189269723&sdata=dWfL7QEDy5bH6i%2B%2BDAkTHwNeYCmpFxZ11uUfJ1wSmpw%3D&reserved=0>

on sent email. Yes include the leading comma.



Happy hunting,
John




On Fri, Aug 16, 2019 at 9:03 AM Frank Barton <bartonf () husson edu<mailto:bartonf () husson edu>> wrote:
Good morning folks,

I'm sure a bunch of you got similar notifications this morning that $BIGNUM accounts at your domain were impacted by 
the April 2018 Chegg Data breach.

We are looking at how we want to address this, as I'm sure that many students use the same password everywhere.

have any of you decided how you are going to address this?
Are you notifying impacted users?
Are you requiring a password reset for campus systems?

Thank You
Frank

--
Frank Barton, MBA
Security+, ACMT, MCP
IT Systems Administrator
Husson University

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--
John McCabe
Senior Information Security Manager & Data Protection Officer
Information Technology Services
[Manhattan College Logo/Shield]
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Phone: 718-862-6217
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