TROJ_DOCSCAR.DBW
Trojan-Dropper.Win32.Dinwod.qsu (Kaspersky), Trojan:Win32/Docscar.A (Microsoft)
Windows

Threat Type: Trojan
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
Downloaded from the Internet, Dropped by other malware
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
15,155,990 bytes
EXE
Yes
01 Aug 2018
Drops files, Modifies system registry, Hides files and processes
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 drops the following files:
- %System%\NTLDR.sys
(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)
It drops the following copies of itself into the affected system:
- %Windows%\Winece.exe
(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)
Autostart Technique
This Trojan modifies the following registry entries to ensure it automatic execution at every system startup:
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Run
MicrosoftOfficeTools = "%Windows%\Winece.exe"
Other System Modifications
This Trojan modifies the following registry entries:
HKEY_CURRENT_USER\Control Panel\Desktop
Wallpaper = NTLDR.sys
Other Details
This Trojan does the following:
- It hides all .doc and .docx files in the %User Profile%\Documents and Current Malware directory.
- Creates a copy of itself under the filename of the .doc and .docx file found
- Opens a .doc or .docx document that has the same filename as the Malware if found
(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista, 7, and 8.)
SOLUTION
9.850
14.416.04
01 Aug 2018
14.417.00
02 Aug 2018
Step 1
Before doing any scans, Windows XP, Windows Vista, and Windows 7 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 TROJ_DOCSCAR.DBW
- 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\Software\Microsoft\Windows\CurrentVersion\Run
- MicrosoftOfficeTools = "%Windows%\Winece.exe"
- MicrosoftOfficeTools = "%Windows%\Winece.exe"
Step 5
Restore this modified 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_CURRENT_USER\Control Panel\Desktop
- Wallpaper = "NTLDR.sys"
- Wallpaper = "NTLDR.sys"
- In HKEY_CURRENT_USER\Control Panel\Desktop
- Wallpaper = "{User preference}"
- Wallpaper = "{User preference}"
Step 6
Search and delete this file
- %System%\NTLDR.sys
Step 7
Scan your computer with your Trend Micro product to delete files detected as TROJ_DOCSCAR.DBW. 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:
Did this description help? Tell us how we did.