Emotet

Emotet virus is a banking trojan that was recently spotted attacking private and public sectors

Emotet virus is one of the most prolific modular banking Trojans that first made an appearance back in 2014. Despite its relatively old age, security researchers at Malwarebytes reported ^[1] that this threat, along with TrickBot banking Trojan, is the most prevalent data-stealing malware in the wild.

During 2018, Emotet was actively attacking the government, healthcare, education, and manufacturing sectors while spreading via exploits and credential brute-forcing. Previously, the malware used to rely on phishing emails embedded with malicious URLs – these led to a document boobytrapped with macro commands that would install the malicious payload. 

Emotet is a data stealer, so its main interest is to copy and send out sensitive information to a remote server, and malware uses a variety of techniques for that. Despite that, it is also equipped with a variety of other functions, such as malware delivery and worm-like functionality to spread laterally within the infected company. On top of these destructive traits, Emotet Trojan can also use evasion techniques to avoid detection by some anti-malware tools.

Emotet virus takes advantage of weak admin passwords and system vulnerabilities that it uses to distribute itself on the computer network. This advanced cyber threat is used for dropping malware on the targeted computers in order to steal financial and banking information.

On the affected machine Emotet Trojan tries to get admin privileges. If it fails to do that, then it runs itself through other system processes. It also makes various changes to the system in order to boot with system startup, collect system information, encrypt it and send it to its Command & Control server.

Major security programs identify this cyber threat as:

• Mal/Emotet-E
• Troj/Inject-CRI
• Troj/Agent-AWUQ
• Troj/Wonton-ABA
• Mal/Generic-S
• C2/Generic-B
• Mal/Emotet-*
• HPmal/Emotet-A
• HPmal/Emotet-B
• Troj/EmotMem-A
• Mal/EncPk-ACW

Despite the fact, the trojan can be detected, Emotet removal is quite complicated due to its specific functionality. The worm is designed to avoid detection. For instance, malware might hide under processes with ransom or legitimately-looking names, for instance, wingroup.exe or servicelog.exe.

Malicious emails examples

Malicious emails examples

Emotet-related files are usually placed in the following directories:

• C:\Windows\
• C:\windows\system32\
• C:\Windows\Syswow64\
• C:\Users\\AppData\Local\Temp\

However, we do not recommend checking these locations and deleting malicious files manually. It is not an effective way to remove Emotet virus from the device. The worm spreads via the network, so it can re-install itself again.

For this reason, it’s important that all computers connected to the affected network have a powerful antivirus installed. Only powerful malware removal tools can terminate this cyber threat entirely. We highly recommend using well-known anti-virus tools that are known to be capable of eliminating trojan from the system.

It is important to uninstall Emotet immediately because malware is capable of bringing other cyber infections to the system. Security specialists from Viruss.lv^[3] report that this banking worm can bring Dridex^[4] or Qakbot^[5] viruses to the affected systems too.

Emotet virus is programmed to distribute Dridex Malware.

Emotet virus is programmed to distribute Dridex Malware.

Five years after its creation, Emotet virus is still active – was spotted attacking various organizations throughout 2019

According to the report published by security researchers,^[1] the last quarter of 2019 saw a decline in crypto-malware attacks, which totaled 7% year-over-year- increase. Instead, the data-stealing viruses were on the rise.

In particular, banking trojan Emotet affected many organizations and firms around the world, but mostly focusing on the US institutions, as it is typical for most malware due to strong economic factors. Emotet and TrickBot were targeting a variety of sectors, including governmental, hospitality, healthcare, manufacturing, and others.

Emotet prevalence around the world during 2018. Source: Malwarebytes

Emotet prevalence around the world during 2018. Source: Malwarebytes

Emotet is also included in a massive botnet. Once the user clicks on the malicious link in the spam email, the malware takes over his or her inbox and can start sending out malspam, and recipients do not suspect that the email is malicious, due to the trusted source.

After that, Emotet exploits EternalBlue to exploit vulnerable systems on the network. The affected computers then spread the virus laterally with the help of brute-forcing. Due to such a complicated scheme, Emotet still manages to rise to the top when it comes to infection rates, and it does not seem that it is stopping any time soon.

Infiltration and operation peculiarities of the banking Trojan

Authors of this malware have been spreading this malware via malicious spam emails. The phishing email arrives as a spam invoice e-mail or notification to make a payment to lure gullible computer users into opening the malicious link attached to the letter.

The link redirects to the specific URL address which triggers a download of an infected document that includes malicious macro command. This macro embedded in the document prompts cmd.exe and PowerShell to download malware payload from the malicious website.

Malicious emails examples

Malicious emails examples

The list of discovered URL links used to distribute Emotet banking trojan:

• hxxp://vanguardatlantic[.]com/Invoice-number-7121315833-issue/;
• hxxp://abbeykurtz[.]com/VZZQNZJIZD9113942;
• hxxp://charly-bass[.]de/Copy-Invoice-0954/;
• hxxp://aplacetogrowtherapy[.]com/CNNKIAPGEP3572621.

After the installation the copies of the malware are stored in the following folders:

• System%\{string 1}{string 2}.exe;
• %AppDataLocal%\Microsoft\Windows\{string 1}{string 2}.exe.

Besides, IT analysts say that the malicious program deletes the Alternate Data Stream (also known as Zone identifier)^[6] which determines the source of the file you attempt to download from Internet Explorer. Thus, it is almost impossible to detect trojan by yourself.

Shortly after, the trojan circumvents the system by registering as system service and modifies Windows Registry entries to enable an autostart mechanism. In other terms, Emotet virus sets itself to launch every time you turn on your computer.

Users are asked to enable macros for the infection to start

Users are asked to enable macros for the infection to start

Instructions on how to eliminate Emotet from the affected computer

As mentioned above, this malicious virus can infect other computers connected to the network. If you delay Emotet removal, you risk not only your own safety but other’s as well. Be aware that this is a very dangerous program that is programmed to hide its presence and traces. Trying to get rid of it by yourself might lead to irreversible damage to your system.

We advise you to remove Emotet virus as soon as possible by employing a robust anti-malware program. However, this banking trojan might block the installation of the security software. Thus, you have to reboot your computer to Safe Mode and download it afterward. Shortly after, you will be able to run a full system scan and eliminate the malware. 

Keep in mind that you have to remove Emotet from all computers that are connected to the same affected network. If you run a system scan a couple of times and you still find malicious components, it means that some of the machines are still connected. So, trojan removal is a complex task and requires cleaning all connected machines immediately. Finally, fix virus damage with Reimage Reimage Cleaner Intego.