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* Hackers breach MailChimp's internal tools to target crypto customers
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HACKERS BREACH MAILCHIMP'S INTERNAL TOOLS TO TARGET CRYPTO CUSTOMERS
By
LAWRENCE ABRAMS
* April 4, 2022
* 10:53 AM
* 1
Email marketing firm MailChimp disclosed on Sunday that they had been hit by
hackers who gained access to internal customer support and account management
tools to steal audience data and conduct phishing attacks.
Sunday morning, Twitter was abuzz with reports from owners of Trezor hardware
cryptocurrency wallets who received phishing notifications claiming that the
company suffered a data breach.
These emails prompted Trezort customers to reset their hardware wallet PINs by
downloading malicious software that allowed stealing the stored cryptocurrency.
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websiteGO TO PAGE
Fake Trezor data breach notification
Source: Twitter
Trezor later shared that MailChimp had been compromised by threat actors
targeting the cryptocurrency industry, who conducted the phishing attack.
MAILCHIMP BREACH TARGETED CRYPTO, FINANCE
In an email to BleepingComputer, MailChimp has confirmed that the breach was
more significant than just Trezor's account being accessed by threat actors.
According to MailChimp, some of their employees fell for a social engineering
attack that led to the theft of their credentials.
"On March 26, our Security team became aware of a malicious actor accessing one
of our internal tools used by customer-facing teams for customer support and
account administration," MailChimp CISO, Siobhan Smyth, told BleepingComputer.
"The incident was propagated by an external actor who conducted a successful
social engineering attack on Mailchimp employees, resulting in employee
credentials being compromised."
"We acted swiftly to address the situation by terminating access for the
compromised employee accounts and took steps to prevent additional employees
from being affected."
These credentials were used to access 319 MailChimp accounts and to export
"audience data," likely mailing lists, from 102 customer accounts.
In addition to viewing accounts and exporting data, the threat actors gained
access to API keys for an undisclosed number of customers, which have now been
disabled and can no longer be used.
Application Programming Interface (API) keys are access tokens that allow
MailChimp customers to manage their accounts and perform marketing campaigns
directly from their own websites or platforms.
Using these compromised API keys, a threat actor can create custom email
campaigns, such as phishing campaigns, and send them to mailing lists without
accessing MailChimp's customer portal.
Smyth told BleepingComputer that all of the compromised account holders have
been notified and that the threat actors accessed customers in the
cryptocurrency and finance sectors.
MailChimp says that they received reports of this access being used to conduct
phishing campaigns against stolen contacts but have not disclosed information
about those attacks..
MailChimp recommends that all customers enable two-factor authentication on
their accounts for further protection.
> "We sincerely apologize to our users for this incident and realize that it
> brings inconvenience and raises questions for our users and their customers.
> We take pride in our security culture, infrastructure, and the trust our
> customers place in us to safeguard their data. We’re confident in the security
> measures and robust processes we have in place to protect our users’ data and
> prevent future incidents."
>
> Siobhan Smyth, Mailchimp’s CISO.
This attack is reminiscent of recent breaches by the Lapsus$ hacking group,
who used social engineering, malware, and credential theft to gain access to
numerous well-known companies, including Nvidia, Samsung, Microsoft, and Okta.
The Okta breach was accomplished through a similar method as MailChimp, by
social-engineering a contractor who had access to internal customer support and
account management systems.
BleepingComputer has sent MailChimp and Trezor further questions about the
breach but has not heard back.
RELATED ARTICLES:
Fake Trezor data breach emails used to steal cryptocurrency wallets
New Meta information stealer distributed in malspam campaign
Ukraine: Russian Armageddon phishing targets EU govt agencies
Microsoft announces new Windows 11 security, encryption features
Australia warns of money recovery phishing luring past victims
* MailChimp
* Phishing
* Social Engineering
* Trezor
* Facebook
* Twitter
* LinkedIn
* Email
*
LAWRENCE ABRAMS
Lawrence Abrams is the owner and Editor in Chief of BleepingComputer.com.
Lawrence's area of expertise includes Windows, malware removal, and computer
forensics. Lawrence Abrams is a co-author of the Winternals Defragmentation,
Recovery, and Administration Field Guide and the technical editor for Rootkits
for Dummies.
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COMMENTS
* ICEPOP33 - 5 DAYS AGO
*
*
Thanks for bringing this to our attention. You usually hear it here first.
One question, though. Where the hell is everybody?
Some lively discussion would be nice. Maybe not my forte, but your site
deserves more apparent traffic. I like your articles that are thorough and
well-written with pertinent details including mitigation, if available at the
outset. Keep up the good work!
As an aside, I think we are staring a hard truth in the face.. and that is
that educating end users about best security practices (let's call it "wet
tech", lol) seems to be the most reliable defense against institutional
breaches and cyber threats in general, and yet we have to admit that there
are not just some, but a vast majority that "we just can't reach" due to
human nature, ingrained habits, gullible personalities, propensity for taking
shortcuts to make work flow easier, resentment at being locked down by IT
(hacker streak), human error, lack of sleep, criminal intent, etc., etc I
think we are stuck with the paradigm of hunter and prey, white hats and black
hats (and all hats in between) for the forseeable future, which ought to make
the solution providers happy.
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