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MAILCHIMP BREACHED, INTRUDERS CONDUCTED PHISHING ATTACKS AGAINST CRYPTO
CUSTOMERS

April 5, 2022  By Pierluigi Paganini


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THREAT ACTORS GAINED ACCESS TO INTERNAL TOOLS OF THE EMAIL MARKETING GIANT
MAILCHIMP TO CONDUCT PHISHING ATTACKS AGAINST CRYPTO CUSTOMERS.

During the weekend, multiple owners of Trezor hardware cryptocurrency wallets
reported having received fake data breach notifications from Trezor,
BleepingComputer first reported.



The fake data breach notification emails urged Trezort customers to reset the
PIN of their hardware wallets by downloading malicious software that could have
allowed attackers to steal the funds in the wallets.

Later Trazor reported that MailChimp have confirmed that their service has been
compromised by an insider targeting crypto companies. Trazor also took the
phishing domain used by threat actors offline and launched an investigation to
determine how many users have been impacted.



A statement shared by Mailchimp CISO Siobhan Smyth with TechCrunch revealed that
the company discovered the security breach on March 26. A threat actor gained
access to a tool used by the company’s customer support and account
administration teams. The company was the victim of a social engineering attack
aimed at its employees.

The attack resulted in the compromise of employee credentials.

“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,” Smyth said. ““When we become aware of any unauthorized
account access, we notify the account owner and immediately take steps to
suspend any further access,” Smyth added. “We also recommend two-factor
authentication and other account security measures for our users as added
measures to keep accounts and passwords secure.”

BleepingComputer states that threat actors compromised 319 MailChimp accounts
and managed to export “audience data,” from 102 customer accounts.

The attackers also gained access to API keys for an undisclosed number of
customers, then the company has disabled them.

Once obtained the API keys, threat actors would have conducted phishing
campaigns without accessing MailChimp’s customer portal.

At this time company has already notified impacted customers, which are in the
cryptocurrency and finance sectors.

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Follow me on Twitter: @securityaffairs and Facebook



Pierluigi Paganini

(SecurityAffairs – hacking, MailChimp)





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PIERLUIGI PAGANINI

Pierluigi Paganini is member of the ENISA (European Union Agency for Network and
Information Security) Threat Landscape Stakeholder Group and Cyber G7 Group, he
is also a Security Evangelist, Security Analyst and Freelance Writer.
Editor-in-Chief at "Cyber Defense Magazine", Pierluigi is a cyber security
expert with over 20 years experience in the field, he is Certified Ethical
Hacker at EC Council in London. The passion for writing and a strong belief that
security is founded on sharing and awareness led Pierluigi to find the security
blog "Security Affairs" recently named a Top National Security Resource for US.
Pierluigi is a member of the "The Hacker News" team and he is a writer for some
major publications in the field such as Cyber War Zone, ICTTF, Infosec Island,
Infosec Institute, The Hacker News Magazine and for many other Security
magazines. Author of the Books "The Deep Dark Web" and “Digital Virtual Currency
and Bitcoin”.




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 * Cyber Crime
 * Cyber warfare
 * APT
 * Data Breach
 * Deep Web
 * Digital ID
 * Hacking
 * Hacktivism
 * Intelligence
 * Internet of Things
 * Laws and regulations
 * Malware
 * Mobile
 * Reports
 * Security
 * Social Networks
 * Terrorism
 * ICS-SCADA
 * EXTENDED COOKIE POLICY
 * Contact me

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