Backdoor.Win32.NETWIRED.FAQ
Windows
Threat Type: Backdoor
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It disables Task Manager, Registry Editor, and Folder Options.
TECHNICAL DETAILS
1,365,631 bytes
EXE
Yes
12 Jan 2020
Arrival Details
This Backdoor 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 Backdoor adds the following processes:
- "%System%\WScript.exe" "%User Temp%\88451026\sfi.vbs"
- %User Temp%\88451026\sfi.vbs
- "%User Temp%\88451026\llm.exe" kim=nok
- llm.exe kim=nok
(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).)
It creates the following folders:
- %User Profile%\AppData
- %System Root%\Users
- %User Temp%\88451026
- %User Profile%\temp
(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name} 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.. %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).)
Autostart Technique
This Backdoor adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\RunOnce
88451026 = "%User Temp%\88451026\start.vbs"
It drops the following file(s) in the Windows User Startup folder to enable its automatic execution at every system startup:
- %User Startup%\start.lnk
(Note: %User Startup% is the current user's Startup folder, which is usually C:\Windows\Profiles\{user name}\Start Menu\Programs\Startup on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu\Programs\Startup on Windows NT, C:\Documents and Settings\{User name}\Start Menu\Programs\Startup on Windows 2003(32-bit), XP and 2000(32-bit), or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit), 10(64-bit).)
Other System Modifications
This Backdoor adds the following registry keys:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
System
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Run
WindowsUpdate = "%User Temp%\88451026\llm.exe %User Temp%\88451026\KIM_NO~1"
It creates the following registry entry(ies) to disable Task Manager, Registry Tools and Folder Options:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
System
DisableTaskMgr = "1"
Dropping Routine
This Backdoor drops the following files:
- %User Temp%\88451026\start.vbs
- %User Temp%\88451026\gpw.xl
- %User Temp%\88451026\pjk.mp3
- %User Temp%\88451026\bhd.ico
- %User Temp%\88451026\cto.bin
- %User Temp%\88451026\aal.icm
- %User Temp%\88451026\grt.xml
- %User Temp%\88451026\xcu.msc
- %User Temp%\88451026\tix.bin
- %User Temp%\88451026\ioi.ico
- %User Temp%\88451026\qsq.ini
- %User Temp%\88451026\tiu.ini
- %User Temp%\88451026\mka.dat
- %User Temp%\88451026\llm.exe
- %User Profile%\temp\fsk.log
- %User Temp%\88451026\wpf.dll
- %User Temp%\88451026\fvg.xml
- %User Temp%\88451026\akt.ppt
- %User Temp%\88451026\tag.docx
- %User Temp%\88451026\sqt.cpl
- %User Temp%\88451026\sfi.vbs
- %User Temp%\88451026\ili.docx
- %User Temp%\88451026\cis.dat
- %User Temp%\88451026\xcc.exe
- %User Temp%\88451026\uqm.pdf
- %User Temp%\88451026\ndx.txt
- %User Temp%\88451026\rjr.pdf
- %User Temp%\88451026\fxb.xl
- %User Temp%\88451026\deg.bin
- %User Temp%\88451026\trg.xl
- %User Temp%\88451026\ptu.txt
- %User Temp%\88451026\fsk.log
- %User Temp%\88451026\gcq.msc
- %User Temp%\88451026\qgt.jpg
- %User Temp%\88451026\aox.xml
- %User Temp%\88451026\oms.pdf
- %User Temp%\88451026\uoi.ppt
- %User Temp%\88451026\sap.ico
- %User Temp%\88451026\pak.xls
- %User Temp%\88451026\start.cmd
- %User Temp%\88451026\lew.cpl
- %User Temp%\88451026\xhr.ini
- %User Temp%\88451026\jpc.pdf
- %User Temp%\88451026\slk.txt
- %User Temp%\88451026\egh.mp3
- %User Temp%\88451026\iiv.log
- %User Temp%\88451026\xav.mp3
- %User Temp%\88451026\njp.bmp
- %User Temp%\88451026\spc.icm
- %User Temp%\88451026\sta.log
- %User Temp%\88451026\bur.pdf
- %User Temp%\88451026\csk.xl
- %User Temp%\88451026\ihg.msc
- %User Temp%\88451026\elc.dll
- %User Temp%\88451026\lrw.bmp
- %User Temp%\88451026\mtw.xml
- %User Temp%\88451026\ega.xml
- %User Temp%\88451026\igu.cpl
- %User Temp%\88451026\isj.log
- %User Temp%\88451026\pfj.bmp
- %User Temp%\88451026\nar.exe
- %User Temp%\88451026\pqf.bmp
- %User Temp%\88451026\bgf.xls
- %User Temp%\88451026\jte.mp3
- %User Temp%\88451026\xxf.xml
- %User Temp%\88451026\ini
- %User Temp%\88451026\kpn.icm
- %User Temp%\88451026\eid.icm
- %User Temp%\88451026\hum.log
- %User Temp%\88451026\jjp.ico
- %User Temp%\88451026\bor.dat
- %User Temp%\88451026\aom.ini
- %User Temp%\88451026\wpv.log
- %User Temp%\88451026\tmd.xls
- %User Temp%\88451026\slr.jpg
- %User Temp%\88451026\jvi.xml
- %User Temp%\88451026\dpi.dll
- %User Temp%\88451026\rms.log
- %User Temp%\88451026\gsj.xml
- %User Temp%\88451026\bxn.exe
- %User Temp%\88451026\cwo.log
- %User Temp%\88451026\koi.ini
- %User Temp%\88451026\eqr.icm
- %User Temp%\88451026\kim=nok
(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).. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name} 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.
SOLUTION
9.850
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
Restart in Safe Mode
Step 3
Identify and terminate files detected as Backdoor.Win32.NETWIRED.FAQ
- 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
Enable Registry Editor, Task Manager, and Folder options
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.
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies
- System
Step 6
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\RunOnce
- 88451026 = "%User Temp%\88451026\start.vbs"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run
- WindowsUpdate = "%User Temp%\88451026\llm.exe %User Temp%\88451026\KIM_NO~1"
Step 7
Search and delete these components
- %User Temp%\88451026\start.vbs
- %User Temp%\88451026\gpw.xl
- %User Temp%\88451026\pjk.mp3
- %User Temp%\88451026\bhd.ico
- %User Temp%\88451026\cto.bin
- %User Temp%\88451026\aal.icm
- %User Temp%\88451026\grt.xml
- %User Temp%\88451026\xcu.msc
- %User Temp%\88451026\tix.bin
- %User Temp%\88451026\ioi.ico
- %User Temp%\88451026\qsq.ini
- %User Temp%\88451026\tiu.ini
- %User Temp%\88451026\mka.dat
- %User Temp%\88451026\llm.exe
- %User Profile%\temp\fsk.log
- %User Temp%\88451026\wpf.dll
- %User Temp%\88451026\fvg.xml
- %User Temp%\88451026\akt.ppt
- %User Temp%\88451026\tag.docx
- %User Temp%\88451026\sqt.cpl
- %User Temp%\88451026\sfi.vbs
- %User Temp%\88451026\ili.docx
- %User Temp%\88451026\cis.dat
- %User Temp%\88451026\xcc.exe
- %User Temp%\88451026\uqm.pdf
- %User Temp%\88451026\ndx.txt
- %User Temp%\88451026\rjr.pdf
- %User Temp%\88451026\fxb.xl
- %User Temp%\88451026\deg.bin
- %User Temp%\88451026\trg.xl
- %User Temp%\88451026\ptu.txt
- %User Temp%\88451026\fsk.log
- %User Temp%\88451026\gcq.msc
- %User Temp%\88451026\qgt.jpg
- %User Temp%\88451026\aox.xml
- %User Temp%\88451026\oms.pdf
- %User Temp%\88451026\uoi.ppt
- %User Temp%\88451026\sap.ico
- %User Temp%\88451026\pak.xls
- %User Temp%\88451026\start.cmd
- %User Temp%\88451026\lew.cpl
- %User Temp%\88451026\xhr.ini
- %User Temp%\88451026\jpc.pdf
- %User Temp%\88451026\slk.txt
- %User Temp%\88451026\egh.mp3
- %User Temp%\88451026\iiv.log
- %User Temp%\88451026\xav.mp3
- %User Temp%\88451026\njp.bmp
- %User Temp%\88451026\spc.icm
- %User Temp%\88451026\sta.log
- %User Temp%\88451026\bur.pdf
- %User Temp%\88451026\csk.xl
- %User Temp%\88451026\ihg.msc
- %User Temp%\88451026\elc.dll
- %User Temp%\88451026\lrw.bmp
- %User Temp%\88451026\mtw.xml
- %User Temp%\88451026\ega.xml
- %User Temp%\88451026\igu.cpl
- %User Temp%\88451026\isj.log
- %User Temp%\88451026\pfj.bmp
- %User Temp%\88451026\nar.exe
- %User Temp%\88451026\pqf.bmp
- %User Temp%\88451026\bgf.xls
- %User Temp%\88451026\jte.mp3
- %User Temp%\88451026\xxf.xml
- %User Temp%\88451026\ini
- %User Temp%\88451026\kpn.icm
- %User Temp%\88451026\eid.icm
- %User Temp%\88451026\hum.log
- %User Temp%\88451026\jjp.ico
- %User Temp%\88451026\bor.dat
- %User Temp%\88451026\aom.ini
- %User Temp%\88451026\wpv.log
- %User Temp%\88451026\tmd.xls
- %User Temp%\88451026\slr.jpg
- %User Temp%\88451026\jvi.xml
- %User Temp%\88451026\dpi.dll
- %User Temp%\88451026\rms.log
- %User Temp%\88451026\gsj.xml
- %User Temp%\88451026\bxn.exe
- %User Temp%\88451026\cwo.log
- %User Temp%\88451026\koi.ini
- %User Temp%\88451026\eqr.icm
- %User Temp%\88451026\kim=nok
Step 8
Search and delete these folders
- %User Profile%\AppData
- %System Root%\Users
- %User Temp%\88451026
- %User Profile%\temp
Step 9
Restart in normal mode and scan your computer with your Trend Micro product for files detected as Backdoor.Win32.NETWIRED.FAQ. 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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