TROJ_DLOADER.DDEX
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.
However, as of this writing, the said sites are inaccessible.
TECHNICAL DETAILS
264,664 bytes
EXE
No
25 Oct 2017
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 copies of itself into the affected system:
- %User Temp%\{edcee908-b280-bcd3-a1ee-50fd6703e91a}\5lmTVwS3.exe
(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Explorer\Run
Check Update = "%User Temp%\{edcee908-b280-bcd3-a1ee-50fd6703e91a}\5lmTVwS3.exe"
Other System Modifications
This Trojan adds the following registry keys:
HKEY_CURRENT_USER\Software\QtProject
It adds the following registry entries:
HKEY_CURRENT_USER\Software\QtProject
{hex value} = "{hex values}"
HKEY_CURRENT_USER\Software\QtProject
tmp_file = "{malware path and filename}"
Other Details
This Trojan connects to the following possibly malicious URL:
- {BLOCKED}efa.net
However, as of this writing, the said sites are inaccessible.
SOLUTION
9.850
13.744.04
27 Oct 2017
13.745.00
28 Oct 2017
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
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.
- In HKEY_CURRENT_USER\Software
- QtProject
- QtProject
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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run
- Check Update = "%User Temp%\{edcee908-b280-bcd3-a1ee-50fd6703e91a}\5lmTVwS3.exe"
- Check Update = "%User Temp%\{edcee908-b280-bcd3-a1ee-50fd6703e91a}\5lmTVwS3.exe"
Step 5
Scan your computer with your Trend Micro product to delete files detected as TROJ_DLOADER.DDEX. 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 this Knowledge Base page for more information.
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