Trojan.MSIL.TASKLOADER.B
Trojan-Downloader.MSIL.TaskLoader.gen (Kaspersky), MSIL/Adware.OxyPumper.AQ (Nod32)
Windows
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
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.
TECHNICAL DETAILS
75,264 bytes
EXE
Yes
11 Jan 2022
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.
Other System Modifications
This Trojan adds the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\.NET CLR Data\Linkage
Export = .NET CLR Data
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\.NET CLR Networking\Linkage
Export = .NET CLR Networking
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\.NET Data Provider for Oracle\Linkage
Export = .NET Data Provider for Oracle
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\.NET Data Provider for SqlServer\Linkage
Export = .NET Data Provider for SqlServer
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\.NET Memory Cache 4.0\Linkage
Export = .NET Memory Cache 4.0
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\MSDTC Bridge 3.0.0.0\Linkage
Export = MSDTC Bridge 3.0.0.0
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\MSDTC Bridge 4.0.0.0\Linkage
Export = MSDTC Bridge 4.0.0.0
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\ServiceModelEndpoint 3.0.0.0\Linkage
Export = ServiceModelEndpoint 3.0.0.0
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\ServiceModelOperation 3.0.0.0\Linkage
Export = ServiceModelOperation 3.0.0.0
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\ServiceModelService 3.0.0.0\Linkage
Export = ServiceModelService 3.0.0.0
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\SMSvcHost 3.0.0.0\Linkage
Export = SMSvcHost 3.0.0.0
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\Windows Workflow Foundation 3.0.0.0\Linkage
Export = Windows Workflow Foundation 3.0.0.0
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\Windows Workflow Foundation 4.0.0.0\Linkage
Export = Windows Workflow Foundation 4.0.0.0
Other Details
This Trojan adds the following registry keys:
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\MSDTC Bridge 3.0.0.0\Linkage
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\MSDTC Bridge 4.0.0.0\Linkage
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\ServiceModelEndpoint 3.0.0.0\Linkage
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\ServiceModelOperation 3.0.0.0\Linkage
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\ServiceModelService 3.0.0.0\Linkage
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\SMSvcHost 3.0.0.0\Linkage
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\SMSvcHost 4.0.0.0\Linkage
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\Windows Workflow Foundation 3.0.0.0\Linkage
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\Windows Workflow Foundation 4.0.0.0\Linkage
It does the following:
- Creates a window that displays the following:
- OS Version
- Current Date
- UTC Time
- Memory Available
- CPU Usage
- Disk Time
SOLUTION
9.800
17.308.06
11 Jan 2022
17.309.00
12 Jan 2022
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
Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.
Step 3
Identify and terminate files detected as Trojan.MSIL.TASKLOADER.B
- 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.
Step 4
Delete this registry value
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\.NET CLR Data\Linkage
- Export = .NET CLR Data
- Export = .NET CLR Data
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\.NET CLR Networking\Linkage
- Export = .NET CLR Networking
- Export = .NET CLR Networking
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\.NET Data Provider for Oracle\Linkage
- Export = .NET Data Provider for Oracle
- Export = .NET Data Provider for Oracle
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\.NET Data Provider for SqlServer\Linkage
- Export = .NET Data Provider for SqlServer
- Export = .NET Data Provider for SqlServer
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\.NET Memory Cache 4.0\Linkage
- Export = .NET Memory Cache 4.0
- Export = .NET Memory Cache 4.0
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\MSDTC Bridge 3.0.0.0\Linkage
- Export = MSDTC Bridge 3.0.0.0
- Export = MSDTC Bridge 3.0.0.0
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\MSDTC Bridge 4.0.0.0\Linkage
- Export = MSDTC Bridge 4.0.0.0
- Export = MSDTC Bridge 4.0.0.0
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\ServiceModelEndpoint 3.0.0.0\Linkage
- Export = ServiceModelEndpoint 3.0.0.0
- Export = ServiceModelEndpoint 3.0.0.0
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\ServiceModelOperation 3.0.0.0\Linkage
- Export = ServiceModelOperation 3.0.0.0
- Export = ServiceModelOperation 3.0.0.0
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\ServiceModelService 3.0.0.0\Linkage
- Export = ServiceModelService 3.0.0.0
- Export = ServiceModelService 3.0.0.0
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\SMSvcHost 3.0.0.0\Linkage
- Export = SMSvcHost 3.0.0.0
- Export = SMSvcHost 3.0.0.0
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\Windows Workflow Foundation 3.0.0.0\Linkage
- Export = Windows Workflow Foundation 3.0.0.0
- Export = Windows Workflow Foundation 3.0.0.0
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\Windows Workflow Foundation 4.0.0.0\Linkage
- Export = Windows Workflow Foundation 4.0.0.0
- Export = Windows Workflow Foundation 4.0.0.0
Step 5
Delete this registry key
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
- HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\MSDTC Bridge 3.0.0.0\Linkage
- HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\MSDTC Bridge 4.0.0.0\Linkage
- HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\ServiceModelEndpoint 3.0.0.0\Linkage
- HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\ServiceModelOperation 3.0.0.0\Linkage
- HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\ServiceModelService 3.0.0.0\Linkage
- HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\SMSvcHost 3.0.0.0\Linkage
- HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\SMSvcHost 4.0.0.0\Linkage
- HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\Windows Workflow Foundation 3.0.0.0\Linkage
- HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\Windows Workflow Foundation 4.0.0.0\Linkage
Step 6
Scan your computer with your Trend Micro product to delete files detected as Trojan.MSIL.TASKLOADER.B. 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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