Virus.Win32.NAPWHICH.C

This Virus arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It executes commands from a remote malicious user, effectively compromising the affected system. It connects to a website to send and receive information.

As of this writing, the said sites are inaccessible.

Arrival Details

This Virus 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 Virus adds the following folders:

• %ProgramData%\Synaptics

(Note: %ProgramData% is a version of the Program Files folder where any user on a multi-user computer can make changes to programs. This contains application data for all users. This is usually C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit), or C:\Documents and Settings\All Users on Windows Server 2003(32-bit), 2000(32-bit) and XP.)

It drops the following files:

• {Malware path}\._cache_{Malware name} (copy of original executable prior to its infection)
• %ProgramData%\Synaptics\Synaptics.exe (mother file)
• %System%\{Random characters}.exe

(Note: %ProgramData% is a version of the Program Files folder where any user on a multi-user computer can make changes to programs. This contains application data for all users. This is usually C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit), or C:\Documents and Settings\All Users on Windows Server 2003(32-bit), 2000(32-bit) and XP.. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

It adds the following processes:

• {Malware path}\._cache_{Malware name}
• %ProgramData%\Synaptics\Synaptics.exe InjUpdate
• %System%\cmd.exe /c pause
• %System%\cmd.exe /c del {Malware path}\._cache_{Malware name} > nul

(Note: %ProgramData% is a version of the Program Files folder where any user on a multi-user computer can make changes to programs. This contains application data for all users. This is usually C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit), or C:\Documents and Settings\All Users on Windows Server 2003(32-bit), 2000(32-bit) and XP.. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

It adds the following mutexes to ensure that only one of its copies runs at any one time:

• Synaptics2X
• FBsaFRkaHhUUGxoVFB0cKw==

Autostart Technique

This Virus adds the following registry entries to enable its automatic execution at every system startup:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
Synaptics Pointing Device Driver = %ProgramData%\Synaptics\Synaptics.exe

It starts the following services:

• Service name: Abcdef Hijklmno Qrs
  Image path: %System%\{Random characters}.exe

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

File Infection

This Virus infects the following file types:

• .exe
• .xlsx (changed extension to .xlsm)

Backdoor Routine

This Virus executes the following commands from a remote malicious user:

• Get command line access
• Capture screenshot
• List all disks
• List folders
• Download and execute files
• Delete files
• Add guest users to net group
• Display message boxes
• Log keystrokes
• Get clipboard data
• Write to master boot record

It connects to the following websites to send and receive information:

• http://freedns.{BLOCKED}d.org/api/?action=getdyndns&sha=a30fa98efc092684e8d1c5cff797bcc613562978
• xred.{BLOCKED}o.com:1199
• {BLOCKED}.{BLOCKED}.103.169:6380

As of this writing, the said sites are inaccessible.

Download Routine

This Virus connects to the following website(s) to download and execute a malicious file:

• https://docs.{BLOCKED}e.com/uc?id=0BxsMXGfPIZfSVlVsOGlEVGxuZVk&export
• https://www.{BLOCKED}x.com/s/n1w4p8gc6jzo0sg/SUpdate.ini?dl=1
• http://xred.{BLOCKED}.net/syn/SUpdate.ini
• https://docs.{BLOCKED}e.com/uc?id=0BxsMXGfPIZfSVzUyaHFYVkQxeFk&export=download
• https://www.{BLOCKED}x.com/s/zhp1b06imehwylq/Synaptics.rar?dl=1
• http://xred.{BLOCKED}.net/syn/Synaptics.rar
• https://docs.{BLOCKED}e.com/uc?id=0BxsMXGfPIZfSTmlVYkxhSDg5TzQ&export=download
• https://www.{BLOCKED}x.com/s/fzj752whr3ontsm/SSLLibrary.dll?dl=1
• http://xred.{BLOCKED}.net/syn/SSLLibrary.dll

It saves the files it downloads using the following names:

• %User Temp%\{Random characters}.ini

(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).)

As of this writing, the said sites are inaccessible.

Information Theft

Upon execution of the affected application, it gathers the following information:

• OS information
• Location of %ProgramData% folder
• Dropped file and folder name
• Flag to indicate if malware is executed as administrator
• Malware version
• Keylogged information
• Clipboard data

(Note: %ProgramData% is a version of the Program Files folder where any user on a multi-user computer can make changes to programs. This contains application data for all users. This is usually C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit), or C:\Documents and Settings\All Users on Windows Server 2003(32-bit), 2000(32-bit) and XP.)

Stolen Information

This Virus sends the data it gathers to the following email addresses via SMTP:

• {BLOCKED}ne2@gmail.com
• {BLOCKED}ne3@gmail.com

Other Details

This Virus does the following:

• It may enable or disable remote desktop connections through manipulating the following registry:
  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server\fDenyTSConnections

It accepts the following parameters:

• InjUpdate