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mail

14 articles

I never ordered this: fraud with delivered packages and letters — brushing and quishing
  • scam

The scam on your doorstep

Brushing, quishing, and other fraud schemes that begin with the delivery by courier of a product you never ordered.

  • Stan Kaminsky

  • August 15, 2025

Credential phishing targets ESPs through ESPs
  • phishing

Recursive credential phishing for ESPs

Cybercriminals prey on access to mailing tools by sending phishing emails through these same tools.

  • Roman Dedenok

  • February 22, 2024

Letters with Remcos RAT hosted in Discord
  • RAT

Remcos RAT via Discord

Cybercriminals send the Remcos remote-access trojan under the guise of letters from a new client.

  • Daria Ivanova

  • December 6, 2023

QBot Trojan in business e-mail
  • trojans

QBot trojan being distributed through business e-mails

Hackers are distributing the QBot trojan through business correspondence.

  • Daria Ivanova

  • April 17, 2023

  • e-mail

Trojan-stealer discovered in spam mailouts to businesses

Cybercriminals are sending to companies high-quality imitations of business letters with a spy trojan in the attachment.

  • Roman Dedenok

  • September 23, 2022

  • phishing

Phishing disguised as spam

Attackers are trying to steal credentials from corporate mail by sending lists of quarantined spam e-mails.

  • Roman Dedenok

  • November 16, 2021

  • phishing

How to analyze a suspicious e-mail

If you receive an e-mail of dubious authenticity, analyze it yourself. Here’s how.

  • Yaroslav Andreev

  • October 22, 2021

  • phishing

Hosting provider phishing

How, and why, cybercriminals attack accounts on hosting provider sites.

  • Roman Dedenok

  • February 16, 2021

  • e-mail

The hunt for mailing lists

Cybercriminals are sending phishing e-mails to hijack access to ESP accounts.

  • Roman Dedenok

  • February 2, 2021

  • phishing

How to fight delayed phishing

Phishing links in e-mails to company employees often become active after initial scanning. But they still can and must be caught.

  • Oleg Sikorsky

  • September 22, 2020

  • phishing

The hunt for Office 365 accounts

Common cybercriminal tricks for hijacking Office 365 accounts.

  • Roman Dedenok

  • July 2, 2020

  • BEC

How to deal with internal BEC

BEC attacks that use compromised mailboxes are especially dangerous. Here’s how we learned to identify them.

  • Roman Dedenok

  • May 28, 2020

  • BEC

How to deal with BEC attacks

Companies worldwide regularly fall victim to business e-mail compromise attacks. We explain the danger and how to minimize it.

  • Oleg Sikorsky

  • March 17, 2020

  • spam

Sending spam ain’t good for business

Cybercriminals take control of corporate mail accounts to send filter-dodging spam.

  • Maria Vergelis

  • May 2, 2019

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