PUA.Win32.PluginManager.E.component

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

File Size:

3,424,202 bytes

File Type:

EXE

Initial Samples Received Date:

12 Mar 2020

Arrival Details

This Potentially Unwanted Application 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 Potentially Unwanted Application adds the following folders:

%User Temp%\{Random Characters}.tmp
%System%\PluginManager
%Program Files%\SignTool

(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).. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000(32-bit), Server 2003(32-bit), XP, Vista(64-bit), 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit) , or C:\Program Files (x86) in Windows XP(64-bit), Vista(64-bit), 7(64-bit), 8(64-bit), 8.1(64-bit), 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It drops the following files:

%User Temp%\{Random Characters}.tmp\processwork.dll
%System%\PluginManager\SignToolSetup.exe
%System%\PluginManager\PluginSetup.exe
%System%\PluginManager\Plugin.exe
%System%\PluginManager\MPlugin.exe
%System%\PluginManager\uninst.exe
%User Temp%\{Random Characters}.tmp\ExecCmd.dll
%Program Files%\SignTool\SignTool.exe
%Program Files%\SignTool\CTptkcs.dll
%Program Files%\SignTool\JsDevInfoDll.dll
%Program Files%\SignTool\libeay32.dll
%Program Files%\SignTool\libp11.dll
%Program Files%\SignTool\libcurl.dll
%Program Files%\SignTool\QRGenerator.dll
%Program Files%\SignTool\SSLeay32.dll
%Program Files%\SignTool\help.pdf
%Program Files%\SignTool\uninst.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(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).. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000(32-bit), Server 2003(32-bit), XP, Vista(64-bit), 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit) , or C:\Program Files (x86) in Windows XP(64-bit), Vista(64-bit), 7(64-bit), 8(64-bit), 8.1(64-bit), 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It adds the following processes:

"%System%\PluginManager\PluginSetup.exe" /S _?=C:\Windows\system32\PluginManager
%System%\PluginManager\Plugin.exe -i
%System%\PluginManager\MPlugin.exe -i
%System%\PluginManager\Plugin.exe -start
%System%\PluginManager\MPlugin.exe -start
"%System%\PluginManager\SignToolSetup.exe" /S _?=C:\Windows\system32\PluginManager
%System%\cmd.exe /C taskkill /F /IM SignTool.exe
taskkill /F /IM SignTool.exe
"%Program Files%\SignTool\SignTool.exe"

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000(32-bit), Server 2003(32-bit), XP, Vista(64-bit), 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit) , or C:\Program Files (x86) in Windows XP(64-bit), Vista(64-bit), 7(64-bit), 8(64-bit), 8.1(64-bit), 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Autostart Technique

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

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
SignTool = %Program Files%\SignTool\SignTool.exe

Other System Modifications

This Potentially Unwanted Application deletes the following files:

%User Temp%\{Random Characters}.tmp
%User Temp%\{Random Characters}.tmp\processwork.dll
%User Temp%\{Random Characters}.tmp\ExecCmd.dll
%System%\PluginManager\PluginSetup.exe
%System%\PluginManager\SignToolSetup.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(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).. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\IXINNUO\
SIGNTOOL
Version = ST.EC.V.1.0.R

HKEY_LOCAL_MACHINE\SOFTWARE\IXINNUO\
SIGNTOOL
Path = %Program Files%\SignTool\SignTool.exe

HKEY_LOCAL_MACHINE\SOFTWARE\IXINNUO\
SIGNTOOL
server = http://ec.i-xinnuo.com

HKEY_LOCAL_MACHINE\SOFTWARE\IXINNUO\
SIGNTOOL
port = 54355

HKEY_LOCAL_MACHINE\SOFTWARE\IXINNUO
signon = {Default}

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\App Paths\
SignTool.exe
{Default} = %Program Files%\SignTool\SignTool.exe

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
ÐÅÅµÇ©µç×ÓºÏÍ¬·þÎñÆ½Ì¨
DisplayName = ÐÅÅµÇ©µç×ÓºÏÍ¬·þÎñÆ½Ì¨ ST.EC.V.1.0.R

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
ÐÅÅµÇ©µç×ÓºÏÍ¬·þÎñÆ½Ì¨
UninstallString = %Program Files%\SignTool\uninst.exe

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
ÐÅÅµÇ©µç×ÓºÏÍ¬·þÎñÆ½Ì¨
DisplayIcon = %Program Files%\SignTool\SingTool.exe

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
ÐÅÅµÇ©µç×ÓºÏÍ¬·þÎñÆ½Ì¨
DisplayVersion = ST.EC.V.1.0.R

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
ÐÅÅµÇ©µç×ÓºÏÍ¬·þÎñÆ½Ì¨
URLInfoAbout = http://www.i-xinnuo.com

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
ÐÅÅµÇ©µç×ÓºÏÍ¬·þÎñÆ½Ì¨
Publisher = ${PRODUCT_PUBLISHER}

Other Details

This Potentially Unwanted Application adds the following registry keys:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\eventlog\Application\
Plugin

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\eventlog\Application\
MPlugin

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\App Paths\
Plugin.exe

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
²å¼þ¹ÜÀíÈí¼þ

HKEY_LOCAL_MACHINE\SOFTWARE\IXINNUO

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\App Paths\
SignTool.exe

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
ÐÅÅµÇ©µç×ÓºÏÍ¬·þÎñÆ½Ì¨

HKEY_LOCAL_MACHINE\SOFTWARE\IXINNUO\
SIGNTOOL

HKEY_LOCAL_MACHINE\SOFTWARE\IXINNUO\
SIGNTOOL\contract

It connects to the following possibly malicious URL:

http://ec.{BLOCKED}o.com/e-contract/checkin/first

Minimum Scan Engine:

9.800

SSAPI PATTERN File:

2.366.50

SSAPI PATTERN Date:

07 Jan 2021

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

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 value

[ Learn More ]

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\IXINNUO
- signon = {Default}
In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\SignTool.exe
- {Default} = %Program Files%\SignTool\SignTool.exe
In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\ÐÅÅµÇ©µç×ÓºÏÍ¬·þÎñÆ½Ì¨
- DisplayName = ÐÅÅµÇ©µç×ÓºÏÍ¬·þÎñÆ½Ì¨ ST.EC.V.1.0.R
In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\ÐÅÅµÇ©µç×ÓºÏÍ¬·þÎñÆ½Ì¨
- UninstallString = %Program Files%\SignTool\uninst.exe
In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\ÐÅÅµÇ©µç×ÓºÏÍ¬·þÎñÆ½Ì¨
- DisplayIcon = %Program Files%\SignTool\SingTool.exe
In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\ÐÅÅµÇ©µç×ÓºÏÍ¬·þÎñÆ½Ì¨
- DisplayVersion = ST.EC.V.1.0.R
In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\ÐÅÅµÇ©µç×ÓºÏÍ¬·þÎñÆ½Ì¨
- URLInfoAbout = http://www.i-xinnuo.com
In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\ÐÅÅµÇ©µç×ÓºÏÍ¬·þÎñÆ½Ì¨
- Publisher = ${PRODUCT_PUBLISHER}
In HKEY_LOCAL_MACHINE\SOFTWARE\IXINNUO\SIGNTOOL
- Version = ST.EC.V.1.0.R
In HKEY_LOCAL_MACHINE\SOFTWARE\IXINNUO\SIGNTOOL
- Path = %Program Files%\SignTool\SignTool.exe
In HKEY_LOCAL_MACHINE\SOFTWARE\IXINNUO\SIGNTOOL
- server = http://ec.i-xinnuo.com
In HKEY_LOCAL_MACHINE\SOFTWARE\IXINNUO\SIGNTOOL
- port = 54355

To delete the registry value this malware created:

Open Registry Editor. To do this:
» For Windows 7 and Windows Server 2008 (R2) users, click the Start button, type regedit in the Search input field then press Enter.
» For Windows 8, Windows 8.1, 10, and Windows Server 2012 (R2) users, right-click on the lower left corner of the screen, click Run, type regedit in the text box provided, and then press Enter.
In the left panel of the Registry Editor window, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>IXINNUO
In the right panel, locate and delete the entry:
signon = {Default}
In the left panel of the Registry Editor window, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows>CurrentVersion>App Paths>SignTool.exe
In the right panel, locate and delete the entry:
{Default} = %Program Files%\SignTool\SignTool.exe
In the left panel of the Registry Editor window, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows>CurrentVersion>Uninstall>ÐÅÅµÇ©µç×ÓºÏÍ¬·þÎñÆ½Ì¨
Again In the right panel, locate and delete the entry:
UninstallString = %Program Files%\SignTool\uninst.exe
Again In the right panel, locate and delete the entry:
DisplayIcon = %Program Files%\SignTool\SingTool.exe
Again In the right panel, locate and delete the entry:
DisplayVersion = ST.EC.V.1.0.R
Again In the right panel, locate and delete the entry:
URLInfoAbout = http://www.i-xinnuo.com
Again In the right panel, locate and delete the entry:
Publisher = ${PRODUCT_PUBLISHER}
In the left panel of the Registry Editor window, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>IXINNUO>SIGNTOOL
In the right panel, locate and delete the entry:
Version = ST.EC.V.1.0.R
Again In the right panel, locate and delete the entry:
Path = %Program Files%\SignTool\SignTool.exe
Again In the right panel, locate and delete the entry:
server = http://ec.i-xinnuo.com
Again In the right panel, locate and delete the entry:
port = 54355
Close Registry Editor.

Step 4

Delete this registry key

[ Learn More ]

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. Before you could do this, you must restart in Safe Mode. For instructions on how to do this, you may refer to this page If the preceding step requires you to restart in safe mode, you may proceed to edit the system registry.

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\eventlog\Application\Plugin
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\eventlog\Application\MPlugin
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\Plugin.exe
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\²å¼þ¹ÜÀíÈí¼þ
HKEY_LOCAL_MACHINE\SOFTWARE\IXINNUO
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\SignTool.exe
HKEY_LOCAL_MACHINE\SOFTWARE\IXINNUO\SIGNTOOL
HKEY_LOCAL_MACHINE\SOFTWARE\IXINNUO\SIGNTOOL\contract

Step 5

Search and delete this file

[ Learn More ]

There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.

%User Temp%\{Random Characters}.tmp\processwork.dll
%System%\PluginManager\SignToolSetup.exe
%System%\PluginManager\PluginSetup.exe
%System%\PluginManager\Plugin.exe
%System%\PluginManager\MPlugin.exe
%System%\PluginManager\uninst.exe
%User Temp%\{Random Characters}.tmp\ExecCmd.dll
%Program Files%\SignTool\SignTool.exe
%Program Files%\SignTool\CTptkcs.dll
%Program Files%\SignTool\JsDevInfoDll.dll
%Program Files%\SignTool\libeay32.dll
%Program Files%\SignTool\libp11.dll
%Program Files%\SignTool\libcurl.dll
%Program Files%\SignTool\QRGenerator.dll
%Program Files%\SignTool\SSLeay32.dll
%Program Files%\SignTool\help.pdf
%Program Files%\SignTool\uninst.exe

Step 6

Search and delete this folder

[ Learn More ]

Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.

%User Temp%\{Random Characters}.tmp
%System%\PluginManager
%Program Files%\SignTool

Step 7

Scan your computer with your Trend Micro product to delete files detected as PUA.Win32.PluginManager.E.component. 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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