Any malware exists with the only target – make money on you¹. And the programmers of these things are not thinking of morality – they use all possible tactics. Stealing your personal data, getting the comission for the advertisements you watch for them, exploiting your CPU and GPU to mine cryptocurrencies – that is not the complete list of what they do. Do you like to be a riding equine? That is a rhetorical question.

What does the notification with Trojan:Win32/AgentTesla!MTB detection mean?

The Trojan:Win32/AgentTesla!MTB detection you can see in the lower right corner is demonstrated to you by Microsoft Defender. That anti-malware software is quite OK at scanning, however, prone to be basically unstable. It is prone to malware attacks, it has a glitchy interface and bugged malware removal capabilities. For this reason, the pop-up which says about the AgentTesla is just a notification that Defender has detected it. To remove it, you will likely need to use a separate anti-malware program.

The exact Trojan:Win32/AgentTesla!MTB infection is a very undesirable thing. It sits into your system disguised as a part of something legitimate, or as a part of the tool you have got on a forum. Therefore, it makes all possible steps to make your system weaker. At the end of this “party”, it downloads other viruses – ones which are choosen by crooks who manage this virus. Hence, it is likely impossible to predict the effects from AgentTesla actions. And the unpredictability is one of the most upleasant things when it comes to malware. That’s why it is rather not to choose at all, and don’t let the malware to complete its task.

Threat Summary:

Technical analysis of Trojan:Win32/AgentTesla!MTB threat

That malware causes the following changes in the infected system:

• The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
• Network activity detected but not expressed in API logs. Microsoft built an API solution right into its Windows operating system it reveals network activity for all apps and programs that ran on the computer in the past 30-days. This malware hides network activity.
• Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.

Is Trojan:Win32/AgentTesla!MTB dangerous?

As I have actually stated before, non-harmful malware does not exist. And Trojan:Win32/AgentTesla!MTB is not an exception. This virus alters the system setups, modifies the Group Policies and registry. All of these elements are vital for proper system operating, even when we are not talking about PC safety. Therefore, the virus which AgentTesla carries, or which it will inject later, will try to get maximum profit from you. Cyber burglars can steal your personal data, and then sell it on the Darknet. Using adware and browser hijacker functions, embedded in Trojan:Win32/AgentTesla!MTB virus, they can make money by showing you the advertisements. Each view gives them a penny, but 100 views per day = $1. 1000 victims who watch 100 banners per day – $1000. Easy math, but sad conclusions. It is a bad choice to be a donkey for crooks.