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Avoid infecting your device via "THUAN HIEP THANH" scam emails

Also Known As: NanoCore RAT
Type: Trojan
Distribution: Low
Damage level: Severe

"THUAN HIEP THANH email virus" removal guide

What is the "THUAN HIEP THANH" scam email?

"THUAN HIEP THANH email virus" is a malware-spreading spam campaign. This term defines a mass-scale operation during which deceptive/scam emails are sent by the thousand. The letters distributed through this campaign - request recipients to review and confirm their purchase order. It must be emphasized that these emails are fake, and when their attachment is opened - it triggers download/installation of the NanoCore RAT (Remote Access Trojan). Malware within this classification is designed to enable remote access and control over infected devices. These trojans can have a wide variety of heinous functionalities, and they are deemed to be highly dangerous.

THUAN HIEP THANH malware-spreading email spam campaign

The scam emails with the subject/title "THUAN HIEP THANH CO., LTD - Ref. #20880 (PURCHASE ORDER AND CONTRACT)" (may vary) request recipients to review the attached purchase order and contract. This documentation must be signed again and sent back as soon as possible. The fake letters also invite recipients to contact the sender if they have any questions. As mentioned in the introduction, the "THUAN HIEP THANH" emails are scams. Once the file attached to them is opened - NanoCore RAT's infection chain is initiated.

Remote access trojans allow cyber criminals access and control over compromised devices. They can even enable user-level control over infected machines. These malicious programs are versatile and can cause various severe issues. Typically, RATs have information and content stealing abilities. To elaborate, this malware can: exfiltrate files and information from the system, extract data from browsers and other installed applications (e.g., usernames, passwords, bank account details, credit card numbers, etc.), record keystrokes (keylogging) and/or audio/video via microphones and cameras, take screenshots, steal clipboard (copy/paste buffer) data, etc. Furthermore, these trojans are often capable of causing chain infections; i.e., they can download/install ransomware, cryptocurrency miners, and other malware. To summarize, by trusting the "THUAN HIEP THANH" scam emails, users can experience system infections, serious privacy issues, financial losses, and identity theft. If it is known or suspected that NanoCore RAT (or other malware) has already infected the device - an anti-virus must be used to remove it without delay.

Threat Summary:
Name NanoCore RAT
Threat Type Trojan, password-stealing virus, banking malware, spyware.
Hoax Scam emails request recipients to review and confirm the purchase order and contract.
Attachment(s) Purchase Order & Contract.rar containing Purchase Order & Contract.exe (filenames may vary)
Detection Names Avast (Win32:MalwareX-gen [Trj]), BitDefender (Trojan.GenericKD.46369999), ESET-NOD32 (A Variant Of MSIL/Kryptik.ABDU), Kaspersky (HEUR:Trojan.MSIL.Taskun.gen), Microsoft (Trojan:MSIL/AgenteslaPacker!MTB), Full List Of Detections (VirusTotal)
Symptoms Trojans are designed to stealthily infiltrate the victim's computer and remain silent, and thus no particular symptoms are clearly visible on an infected machine.
Payload NanoCore
Rogue Process Name DINO EDITOR (process name may vary)
Distribution methods Infected email attachments, malicious online advertisements, social engineering, software 'cracks'.
Damage Stolen passwords and banking information, identity theft, the victim's computer added to a botnet.
Malware Removal (Windows)

To eliminate possible malware infections, scan your computer with legitimate antivirus software. Our security researchers recommend using Combo Cleaner.
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"Pending Order", "WMS Technologies Email Virus", "Accounts & Export Depart", "Your Address Is Invalid", and "Alibaba Email Virus" are some examples of spam campaigns used to proliferate malicious software. The emails distributed through these large-scale operations are usually presented as "urgent", "priority", "important", or disguised as messages from legitimate companies, organizations, authorities, service providers, and other entities. Spam campaigns are used for malware distribution and various scams (e.g., phishing). Due to how widespread spam mail is, it is strongly recommended to exercise caution with incoming email letters.

How did "THUAN HIEP THANH email virus" infect my computer?

Systems are infected via malicious files spread through spam campaigns. These files can be attached to the emails, and/or the letters can contain download links of such content. Infectious files can be in a variety of formats, e.g., archives (ZIP, RAR, etc.), executables (.exe, .run, etc.), PDF and Microsoft Office documents, JavaScript, and so on. When the files are executed, run, or otherwise opened - the infection process (i.e., malware download/installation) is jumpstarted. For example, Microsoft Office documents cause infections by executing malicious macro commands. This process begins the moment a document is opened in Microsoft Office versions released before 2010. Newer versions have "Protected View" mode that prevents automatic execution of macros. Instead, users can enable editing/content (i.e., macro commands) manually.

How to avoid installation of malware?

To avoid infecting the system via spam mail, it is advised against opening dubious and irrelevant emails - especially any attachments or links present in them. It is recommended to use Microsoft Office versions released after 2010. Aside from spam campaigns, malware is also distributed through untrustworthy download sources (e.g., unofficial and free file-hosting websites, Peer-to-Peer sharing networks, and other third-party downloaders), illegal activation tools ("cracks"), and fake updates. Therefore, it is important to download only from official and verified channels. Additionally, all programs must be activated and updated with tools/functions provided by genuine developers. It is crucial to have a reputable anti-virus/anti-spyware suite installed and kept up-to-date. This software has to be used to run regular system scans and remove detected threats and issues. If you've already opened "THUAN HIEP THANH email virus" attachment, we recommend running a scan with Combo Cleaner Antivirus for Windows to automatically eliminate infiltrated malware.

Text presented in the "THUAN HIEP THANH" scam email letter:

Subject: THUAN HIEP THANH CO., LTD - Ref. #20880 (PURCHASE ORDER AND CONTRACT)

 

Good day,

 

Please review our confirmed attached purchase order and Contract as attached file, Please check and sign again for me .

 

Feel free to contact us if you have any questions.

 

And please send confirmation at your earliest convenience .


Thank you,

 
Nguyen Xuan Binh
Purchasing Clerk


21/20/77 Le Cong Phap, An Lac Ward, Binh Tan District, Ho Chi Minh City
TELEPHONE: (028) 3755 3728
FAX: (028) 3756 3537
EMAIL: info@thuanhiepthanh.com
WEBSITE: https://thuanhiepthanh.com.vn
COMPANY:  THUAN HIEP THANH CO., LTD

Screenshot of VirusTotal detections of the malicious attachment distributed via "THUAN HIEP THANH" spam campaign ("Purchase Order & Contract.exe"):

THUAN HIEP THANH email virus attachment detections (Purchase Order & Contract.exe)

Screenshot of the malicious executable's process on Windows Task Manager ("DINO EDITOR" process name)

THUAN HIEP THANH email virus process on task manager (DINO EDITOR - process name)

Instant automatic malware removal: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Combo Cleaner is a professional automatic malware removal tool that is recommended to get rid of malware. Download it by clicking the button below:
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How to remove malware manually?

Manual malware removal is a complicated task - usually it is best to allow antivirus or anti-malware programs to do this automatically. To remove this malware we recommend using Combo Cleaner Antivirus for Windows. If you wish to remove malware manually, the first step is to identify the name of the malware that you are trying to remove. Here is an example of a suspicious program running on a user's computer:

malicious process running on user's computer sample

If you checked the list of programs running on your computer, for example, using task manager, and identified a program that looks suspicious, you should continue with these steps:

manual malware removal step 1Download a program called Autoruns. This program shows auto-start applications, Registry, and file system locations:

screenshot of autoruns application

manual malware removal step 2Restart your computer into Safe Mode:

Windows XP and Windows 7 users: Start your computer in Safe Mode. Click Start, click Shut Down, click Restart, click OK. During your computer start process, press the F8 key on your keyboard multiple times until you see the Windows Advanced Option menu, and then select Safe Mode with Networking from the list.

Safe Mode with Networking

Video showing how to start Windows 7 in "Safe Mode with Networking":

Windows 8 users: Start Windows 8 is Safe Mode with Networking - Go to Windows 8 Start Screen, type Advanced, in the search results select Settings. Click Advanced startup options, in the opened "General PC Settings" window, select Advanced startup. Click the "Restart now" button. Your computer will now restart into the "Advanced Startup options menu". Click the "Troubleshoot" button, and then click the "Advanced options" button. In the advanced option screen, click "Startup settings". Click the "Restart" button. Your PC will restart into the Startup Settings screen. Press F5 to boot in Safe Mode with Networking.

Windows 8 Safe Mode with networking

Video showing how to start Windows 8 in "Safe Mode with Networking":

Windows 10 users: Click the Windows logo and select the Power icon. In the opened menu click "Restart" while holding "Shift" button on your keyboard. In the "choose an option" window click on the "Troubleshoot", next select "Advanced options". In the advanced options menu select "Startup Settings" and click on the "Restart" button. In the following window you should click the "F5" button on your keyboard. This will restart your operating system in safe mode with networking.

windows 10 safe mode with networking

Video showing how to start Windows 10 in "Safe Mode with Networking":

manual malware removal step 3Extract the downloaded archive and run the Autoruns.exe file.

extract autoruns.zip and run autoruns.exe

manual malware removal step 4In the Autoruns application, click "Options" at the top and uncheck "Hide Empty Locations" and "Hide Windows Entries" options. After this procedure, click the "Refresh" icon.

Click 'Options' at the top and uncheck 'Hide Empty Locations' and 'Hide Windows Entries' options

manual malware removal step 5Check the list provided by the Autoruns application and locate the malware file that you want to eliminate.

You should write down its full path and name. Note that some malware hides process names under legitimate Windows process names. At this stage, it is very important to avoid removing system files. After you locate the suspicious program you wish to remove, right click your mouse over its name and choose "Delete".

locate the malware file you want to remove

After removing the malware through the Autoruns application (this ensures that the malware will not run automatically on the next system startup), you should search for the malware name on your computer. Be sure to enable hidden files and folders before proceeding. If you find the filename of the malware, be sure to remove it.

searching for malware file on your computer

Reboot your computer in normal mode. Following these steps should remove any malware from your computer. Note that manual threat removal requires advanced computer skills. If you do not have these skills, leave malware removal to antivirus and anti-malware programs. These steps might not work with advanced malware infections. As always it is best to prevent infection than try to remove malware later. To keep your computer safe, install the latest operating system updates and use antivirus software.

To be sure your computer is free of malware infections, we recommend scanning it with Combo Cleaner Antivirus for Windows.

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About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for pcrisk.com since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

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Malware activity

Global malware activity level today:

Medium threat activity

Increased attack rate of infections detected within the last 24 hours.

QR Code
NanoCore RAT QR code
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