Arrival Details
This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Installation
This Trojan adds the following processes:
- schtasks.exe /Create /TN "Updates\ONyqaPeArq" /XML "%User Temp%\tmp451A.tmp"
- {malware file path and name} "{path}"
- dw20.exe -x -s 456
- "%System Root%\Program Files\Windows Media Player\wmpnetwk.exe"
- %System%\svchost.exe -k LocalServiceAndNoImpersonation
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)
It creates the following folders:
- %Windows%\ServiceProfiles\NetworkService\AppData\Local\Microsoft
(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)
Dropping Routine
This Trojan drops the following files:
- %AppDataLocal%\Microsoft\Media Player\CurrentDatabase_372.wmdb
- %All Users Profile%\Microsoft\Network\Downloader\qmgr1.dat
- %All Users Profile%\Microsoft\Network\Downloader\qmgr0.dat
- %AppDataLocal%\GDIPFONTCACHEV1.DAT
- %All Users Profile%\Microsoft\Windows\DRM\drmstore.hds
- %All Users Profile%\Microsoft\Windows\DRM\v3ks.sec
- %Application Data%\ONyqaPeArq.exe
(Note: %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %All Users Profile% is the common user's profile folder, which is usually C:\Documents and Settings\All Users on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit). . %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)
This report is generated via an automated analysis system.
Step 1
Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.
Step 2
Identify and terminate files detected as Trojan.MSIL.AGENTTESLA.THCOCBO
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- Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
- If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
- If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.
To terminate the malware/grayware/spyware process:
- Scan your computer with your Trend Micro product and take note of the name of the malware/grayware/spyware detected.
- Open Windows Task Manager. To do this, press CTRL+SHIFT+ESC.
- View the list of all running programs. To do this:
• For Windows 7 and Server 2008 (R2) users, click the Processes tab.
• For Windows 8, 8.1, 10, and Server 2012 (R2) users, click the Details tab. - In the list of running programs, locate a malware/grayware/spyware file detected earlier.
- Select the detected files, then press either the End Task or the End Process button, depending on the version of Windows you are using.
- Do the same for the remaining detected malware/grayware/spyware files in the list of running programs.
- To check if the malware/grayware/spyware process has been terminated, close Task Manager, and then open it again.
- Close Task Manager.
Step 3
Search and delete these components
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There may be some components that are hidden. Please make sure you check the
Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
- %AppDataLocal%\Microsoft\Media Player\CurrentDatabase_372.wmdb
- %All Users Profile%\Microsoft\Network\Downloader\qmgr1.dat
- %All Users Profile%\Microsoft\Network\Downloader\qmgr0.dat
- %AppDataLocal%\GDIPFONTCACHEV1.DAT
- %All Users Profile%\Microsoft\Windows\DRM\drmstore.hds
- %All Users Profile%\Microsoft\Windows\DRM\v3ks.sec
- %Application Data%\ONyqaPeArq.exe
To manually delete a malware/grayware file from an affected system:
•For Windows 7, Windows Server 2008 (R2), Windows 8, Windows 8.1, Windows 10, and Windows Server 2012 (R2):
- Open a Windows Explorer window.
- For Windows 7 and Server 2008 (R2) users, click Start>Computer.
- For Windows 8, 8.1, 10, and Server 2012 (R2) users, right-click on the lower-left corner of the screen,then click File Explorer.
- In the Search Computer/This PC input box, type:
- %AppDataLocal%\Microsoft\Media Player\CurrentDatabase_372.wmdb
- %All Users Profile%\Microsoft\Network\Downloader\qmgr1.dat
- %All Users Profile%\Microsoft\Network\Downloader\qmgr0.dat
- %AppDataLocal%\GDIPFONTCACHEV1.DAT
- %All Users Profile%\Microsoft\Windows\DRM\drmstore.hds
- %All Users Profile%\Microsoft\Windows\DRM\v3ks.sec
- %Application Data%\ONyqaPeArq.exe
- Once located, select the file then press SHIFT+DELETE to delete it.
*Note: Read the following Microsoft page if these steps do not work on Windows 7 and Windows Server 2008 (R2).
Step 4
Search and delete this folder
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Please make sure you check the
Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
- %Windows%\ServiceProfiles\NetworkService\AppData\Local\Microsoft
To delete the malware/grayware folder:
- Right-click Start then click Search... or Find..., depending on the version of Windows you are running.
- In the Named input box, type:
- %Windows%\ServiceProfiles\NetworkService\AppData\Local\Microsoft
- In the Look In drop-down list, select My Computer, then press Enter.
- Once located, select the folder then press SHIFT+DELETE to permanently delete the folder.
Step 5
Scan your computer with your Trend Micro product to delete files detected as Trojan.MSIL.AGENTTESLA.THCOCBO. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check the following Trend Micro Support pages for more information:
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