The Kronos Hack: A Closer Look at the Malware that Stole Millions


In July 2017, a group of cybercriminals managed to infect hundreds of thousands of computers worldwide with a piece of malware called Kronos. This malware was designed to steal sensitive data such as login credentials, banking information, and personal details. It was particularly effective against banking and financial institutions, which suffered millions of dollars in losses. In this article, we will take a closer look at the Kronos hack, its modus operandi, and the aftermath of the attack.

What is Kronos Malware?

Kronos is a type of banking Trojan that was first discovered in 2014. It was initially sold on underground forums for a high price, which limited its spread to a select group of cybercriminals. However, in 2017, a new variant of Kronos appeared, and it quickly gained popularity among cybercriminals.

The new variant of Kronos was more sophisticated and more accessible than its predecessors. It was designed to bypass antivirus software detection and infect computers through phishing emails and malicious websites. Once installed, Kronos would remain dormant until the user logged into a banking or financial website. At that point, the malware would activate and start stealing login credentials, banking information, and other sensitive data.

Kronos Malware Operation

The Kronos malware’s operation was quite sophisticated. It was designed to target specific financial institutions and avoid detection by antivirus software. Here is a step-by-step breakdown of how the malware worked:

Step 1: Infection

The first step in the Kronos attack was infection. The malware was typically spread through phishing emails or malicious websites. The email or website would contain a link or attachment that, when clicked, would download and install the Kronos malware onto the victim’s computer.

Step 2: Dormancy

Once installed, Kronos would remain dormant until the user visited a banking or financial website. The malware was designed to identify specific banking sites and wait for the user to log in before it would activate.

Step 3: Capture of Data

Once activated, Kronos would capture the victim’s login credentials, banking information, and other sensitive data. It would then send this data to a remote server controlled by the cybercriminals.

Step 4: Remote Control

The cybercriminals could use the captured data to log into the victim’s bank account remotely. From there, they could transfer money, make purchases, and carry out other fraudulent activities.

The aftermath of the Kronos hack

The Kronos malware caused significant damage to the financial sector. Millions of dollars in damages were thought to have been incurred as a result of the malware infecting hundreds of thousands of machines globally. The banks of Canada, Poland, and Japan were among the significant financial institutions that were impacted.

In response to the Kronos attack, law enforcement agencies around the world launched a coordinated effort to track down and arrest the individuals responsible. The US Department of Justice arrested Marcus Hutchins, a Canadian citizen, in August 2017 on suspicion of developing and distributing the Kronos malware. Hutchins was later released on bail and eventually pleaded guilty to two counts of creating and distributing malware.

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Lessons Learned

The Kronos malware attack highlights the importance of strong cybersecurity measures. Here are some lessons that we can learn from this attack:

  1. Stay vigilant against phishing emails and malicious websites.

Phishing emails and malicious websites are still the most common ways that malware is spread. Always be wary of emails or websites that ask you to download or install software.

  1. Keep your software up to date.

Many malware attacks are successful because victims are using outdated software that has known vulnerabilities.

  1. Use antivirus software.

Antivirus software can detect and block many types of malware, including Kronos. Always use a reputable antivirus program and keep it up to date.

  1. Use two-factor authentication.

Even if a cybercriminal steals your login credentials, they won’t be able to access your account without the second factor, such as a text message or authentication app.

  1. Educate yourself on cybersecurity.

Cybersecurity threats are constantly evolving, and it’s important to stay informed about the latest threats and best practices. Attend cybersecurity workshops, read up on the latest news, and be aware of the risks.


The Kronos malware attack was a wake-up call for the financial sector and the wider public. It showed how sophisticated malware can bypass security measures and steal sensitive data. The aftermath of the attack also demonstrated the importance of international cooperation in tracking down and prosecuting cybercriminals. To protect ourselves against future attacks, we must stay vigilant, keep our software up to date, and use strong security measures such as two-factor authentication.


Muhammad Shahid is regarded as one of the most passionate writers of the Lakewoodscoop.net Digital Marketing expert & Outreach specialist in SEO

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