TROJ_DROPPR.DMI

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.

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 creates the following folders:

• %System Root%\DOCUME~1
• %System Root%\DOCUME~1\Wilbert
• %User Profile%\LOCALS~1
• %User Temp%\nsx5.tmp
• %Program Files%\Common Files\Config

(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %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 and 7.. %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 and 7.. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).)

Other System Modifications

This Trojan deletes the following files:

• %User Temp%\nsr1.tmp
• %User Temp%\nsx5.tmp

(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 and 7.)

It adds the following registry keys:

HKEY_LOCAL_MACHINE\Software\Client

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
inethnfd

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Client
cid = "8415"

HKEY_LOCAL_MACHINE\SOFTWARE\Client
cname = "sdAaideMweiV"

HKEY_LOCAL_MACHINE\SOFTWARE\Client
sid = "00000000000000000000000000000000"

HKEY_LOCAL_MACHINE\SOFTWARE\Client
i = "20140625233754"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
inethnfd
UninstallString = "%Program Files%\Common Files\Config\uninstinethnfd.exe "

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
inethnfd
QuietUninstallString = "%Program Files%\Common Files\Config\uninstinethnfd.exe /S"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
inethnfd
DisplayIcon = "%%Program Files%\Common Files\Config\uninstinethnfd.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
inethnfd
DisplayName = "Network System Driver"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
inethnfd
DisplayVersion = "1.0.0.3001"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
inethnfd
VersionMajor = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
inethnfd
VersionMinor = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
inethnfd
NoModify = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
inethnfd
NoRepair = "1"

Dropping Routine

This Trojan drops the following files:

• %User Temp%\nsh3.tmp
• %User Temp%\nsx5.tmp\System.dll
• %User Temp%\nsx5.tmp\nsExec.dll
• %Program Files%\Common Files\Config\data.xml
• %Program Files%\Common Files\Config\ver.xml
• %System%\hfnapi.dll
• %System%\hfpapi.dll
• %System%\installd.exe
• %System%\nethtsrv.exe
• %System%\netupdsrv.exe
• %System%\drivers\nethfdrv.sys
• %Program Files%\Common Files\config\uninstinethnfd.exe

(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 and 7.. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).. %System% is the Windows system folder, which is usually C:\Windows\System32.)

This report is generated via an automated analysis system.