Trojan.Win32.DLOADR.NOJHO
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
301,056 bytes
EXE
Yes
18 Jan 2019
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 and executes them:
- %Windows%\{random numbers}\wincfg32svc.exe
(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)
It creates the following folders:
- %Windows%\{random numbers}
(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
WinCfgMgr = "%Windows%\{random numbers}\wincfg32svc.exe"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
WinCfgMgr = "%Windows%\{random numbers}\wincfg32svc.exe"
Download Routine
This Trojan saves the files it downloads using the following names:
- %User Temp%\{random numbers}.jpg
(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, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, and 8.)
Other Details
This Trojan connects to the following possibly malicious URL:
- http://{BLOCKED}zip.com/
- http://{BLOCKED}.{BLOCKED}.{BLOCKED}7.153/s/attach.js
SOLUTION
9.850
14.764.02
21 Jan 2019
14.765.00
22 Jan 2019
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 Trojan.Win32.DLOADR.NOJHO
- 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
- WinCfgMgr = "%Windows%\{random numbers}\wincfg32svc.exe"
- WinCfgMgr = "%Windows%\{random numbers}\wincfg32svc.exe"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- WinCfgMgr = "%Windows%\{random numbers}\wincfg32svc.exe"
- WinCfgMgr = "%Windows%\{random numbers}\wincfg32svc.exe"
Step 5
Search and delete this file
- %User Temp%\{random numbers}.jpg
Step 6
Scan your computer with your Trend Micro product to delete files detected as Trojan.Win32.DLOADR.NOJHO. 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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