ALIASES:

Trojan:Win32/Estiwir (Microsoft); HEUR:Trojan.Win32.Generic (Kaspersky); Trojan-Dropper.Win32.OnlineGames.qcf (v) (Sunbelt); Win32/Heur (AVG)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • 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.

It deletes itself after execution.

  TECHNICAL DETAILS

File Size: 1,382,036 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 06 Dec 2014

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:

  • %User Temp%\d91a.tmp

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

It creates the following folders:

  • %System Root%\DOCUME~1
  • %System Root%\DOCUME~1\Wilbert
  • %User Profile%\LOCALS~1
  • %User Temp%\nsx8.tmp
  • %Program Files%\PoppinSearch
  • %User Temp%\yhsys

(Note: %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.. %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 user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.)

Autostart Technique

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
PoppinSearchUpDates = "%Program Files%\PoppinSearch\poppind.exe"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
PoppinSearch = "%Program Files%\PoppinSearch\poppins.exe Runcmd"

It registers itself as a BHO to ensure its automatic execution every time Internet Explorer is used by adding the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects\{897A1BC8-4CF0-48F7-AD60-6BF6D5D5B347}

It registers as a system service to ensure its automatic execution at every system startup by adding the following registry keys:

HKEY_LOCAL_MACHINE\System\CurrentControlSet\
Services\6eb8fa5d

HKEY_LOCAL_MACHINE\System\CurrentControlSet\
Services\1213cfdb

Other System Modifications

This Trojan deletes the following files:

  • %User Temp%\nsn4.tmp
  • %User Temp%\nsx8.tmp
  • %System%\Drivers\EstRtw.sys
  • %User Profile%\Cookies\index.dat
  • %User Temp%\e290.exe
  • %System Root%\DelUS.bat

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.. %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.. %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.)

It adds the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
AppID\{33843C8D-C52F-4661-B3E9-34E012BA97F8}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
AppID\poppins.DLL

HKEY_CLASSES_ROOT\poppins.poppins_Obj.1

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
poppins.poppins_Obj.1\CLSID

HKEY_CLASSES_ROOT\poppins.poppins_Obj

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
poppins.poppins_Obj\CLSID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
poppins.poppins_Obj\CurVer

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{897A1BC8-4CF0-48F7-AD60-6BF6D5D5B347}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{897A1BC8-4CF0-48F7-AD60-6BF6D5D5B347}\ProgID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{897A1BC8-4CF0-48F7-AD60-6BF6D5D5B347}\VersionIndependentProgID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{897A1BC8-4CF0-48F7-AD60-6BF6D5D5B347}\Programmable

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{897A1BC8-4CF0-48F7-AD60-6BF6D5D5B347}\InprocServer32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{897A1BC8-4CF0-48F7-AD60-6BF6D5D5B347}\TypeLib

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{36434A45-ADF6-4A9D-A5F5-FE1B7C7C833D}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{36434A45-ADF6-4A9D-A5F5-FE1B7C7C833D}\1.0

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{36434A45-ADF6-4A9D-A5F5-FE1B7C7C833D}\1.0\
FLAGS

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{36434A45-ADF6-4A9D-A5F5-FE1B7C7C833D}\1.0\
0

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{36434A45-ADF6-4A9D-A5F5-FE1B7C7C833D}\1.0\
0\win32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{36434A45-ADF6-4A9D-A5F5-FE1B7C7C833D}\1.0\
HELPDIR

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{33552FEB-9696-463B-8890-321E87DEB830}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{33552FEB-9696-463B-8890-321E87DEB830}\ProxyStubClsid

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{33552FEB-9696-463B-8890-321E87DEB830}\ProxyStubClsid32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{33552FEB-9696-463B-8890-321E87DEB830}\TypeLib

HKEY_CURRENT_USER\Software\poppin\
dinto

HKEY_CURRENT_USER\Software\searchlinenc

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
PoppinSearch uninstall

HKEY_CLASSES_ROOT\CLSID\HOOK_ID

HKEY_CLASSES_ROOT\CLSID\SYS_DLL

HKEY_CURRENT_USER\software\Exchangaps

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
AppID\poppins.DLL
AppID = "{33843C8D-C52F-4661-B3E9-34E012BA97F8}"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{897A1BC8-4CF0-48F7-AD60-6BF6D5D5B347}\InprocServer32
ThreadingModel = "Apartment"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{897A1BC8-4CF0-48F7-AD60-6BF6D5D5B347}
AppID = "{33843C8D-C52F-4661-B3E9-34E012BA97F8}"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects\{897A1BC8-4CF0-48F7-AD60-6BF6D5D5B347}
NoExplorer = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{33552FEB-9696-463B-8890-321E87DEB830}\TypeLib
Version = "1.0"

HKEY_CURRENT_USER\Software\poppin\
dinto
Ver_Sb1 = "20141117"

HKEY_CURRENT_USER\Software\poppin\
dinto
Ver_Sb2 = "20141117"

HKEY_CURRENT_USER\Software\searchlinenc
verupin = "20141117"

HKEY_CURRENT_USER\Software\poppin
cid = "poppin_c"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
PoppinSearch uninstall
DisplayName = "Poppin Search"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
PoppinSearch uninstall
UninstallString = "%Program Files%\PoppinSearch\uninstall.exe "

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
PoppinSearch uninstall
DisplayIcon = "%Program Files%\PoppinSearch\uninstall.exe "

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\HOOK_ID
name = "e290.exe"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\6eb8fa5d
Type = "1"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\6eb8fa5d
ErrorControl = "1"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\6eb8fa5d
Start = "1"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\6eb8fa5d
ImagePath = "\??\%System%\drivers\6eb8fa5d.sys"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\SYS_DLL
name = "tJgHlydfT.dll"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\1213cfdb
Type = "1"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\1213cfdb
ErrorControl = "1"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\1213cfdb
Start = "1"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\1213cfdb
ImagePath = "\??\%System%\drivers\1213cfdb.sys"

HKEY_CURRENT_USER\Software\poppin\
dinto
poppinddcdata = "20141124"

It deletes the following registry keys:

HKEY_CLASSES_ROOT\CLSID\TANG2_OTP

HKEY_CLASSES_ROOT\CLSID\HOK_OTP

HKEY_CLASSES_ROOT\CLSID\TANG1_NCP

HKEY_CLASSES_ROOT\CLSID\TANG1_URL

HKEY_CLASSES_ROOT\CLSID\AH3SEC

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects\{18DF081C-E8AD-4283-A596-FA578C2EBDC3}

HKEY_LOCAL_MACHINE\System\CurrentControlSet\
Services\6eb8fa5d\Enum

HKEY_LOCAL_MACHINE\System\CurrentControlSet\
Services\6eb8fa5d\Security

HKEY_LOCAL_MACHINE\System\CurrentControlSet\
Services\1213cfdb\Enum

HKEY_LOCAL_MACHINE\System\CurrentControlSet\
Services\1213cfdb\Security

Dropping Routine

This Trojan drops the following files:

  • %User Temp%\e290.exe
  • %User Temp%\nsn6.tmp
  • %User Temp%\nsx8.tmp\KillProcDLL.dll
  • %User Temp%\nsx8.tmp\FindProcDLL.dll
  • %Program Files%\PoppinSearch\poppins.dll
  • %Program Files%\PoppinSearch\poppind.exe
  • %Program Files%\PoppinSearch\poppins.exe
  • %User Temp%\nsx8.tmp\version.dll
  • %Program Files%\PoppinSearch\uninstall.exe
  • %User Temp%\nsx8.tmp\DLLWebCount.dll
  • %User Temp%\nsx8.tmp\SelfDelete.dll
  • \DelUS.bat
  • %User Temp%\A1.zip
  • %User Temp%\B1.zip
  • %User Temp%\C1.zip
  • %User Temp%\D1.zip
  • %User Temp%\yhsys\doit.rar
  • %System%\drivers\6eb8fa5d.sys
  • %User Temp%\yDy8he.dll
  • %User Temp%\tJgHlydfT.dll
  • %System%\drivers\1213cfdb.sys
  • %System%\ws2tcpip.dll
  • %System%\midimap.dll

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://aqua.{BLOCKED}x.com/403
  • http://ptnpop.{BLOCKED}-s.co.kr/cnt/index.php?pid=poppin_c&type=7
  • http://{BLOCKED}178.125/mail.asp?{random characters}
  • http://ptnpop.{BLOCKED}-s.co.kr/cnt/index.php?pid=poppin_c&type=4&opt=d
  • http://ptnpop.{BLOCKED}-s.co.kr/poppin/update/ad/poppin/inst.php
  • http://ptnpop.{BLOCKED}-s.co.kr/check/poppin/update/poppin.php
  • {BLOCKED}9.133.33
  • {BLOCKED}.129.71
  • {BLOCKED}.93.165

It deletes itself after execution.

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine: 9.700

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

Restart in Safe Mode

[ Learn More ]

Step 3

Close all opened browser windows

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.

  • In HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services
    • 6eb8fa5d
  • In HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services
    • 1213cfdb
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID
    • {33843C8D-C52F-4661-B3E9-34E012BA97F8}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID
    • poppins.DLL
  • In HKEY_CLASSES_ROOT
    • poppins.poppins_Obj.1
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\poppins.poppins_Obj.1
    • CLSID
  • In HKEY_CLASSES_ROOT
    • poppins.poppins_Obj
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\poppins.poppins_Obj
    • CLSID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\poppins.poppins_Obj
    • CurVer
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
    • {897A1BC8-4CF0-48F7-AD60-6BF6D5D5B347}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{897A1BC8-4CF0-48F7-AD60-6BF6D5D5B347}
    • ProgID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{897A1BC8-4CF0-48F7-AD60-6BF6D5D5B347}
    • VersionIndependentProgID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{897A1BC8-4CF0-48F7-AD60-6BF6D5D5B347}
    • Programmable
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{897A1BC8-4CF0-48F7-AD60-6BF6D5D5B347}
    • InprocServer32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{897A1BC8-4CF0-48F7-AD60-6BF6D5D5B347}
    • TypeLib
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer
    • Browser Helper Objects
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib
    • {36434A45-ADF6-4A9D-A5F5-FE1B7C7C833D}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{36434A45-ADF6-4A9D-A5F5-FE1B7C7C833D}
    • 1.0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{36434A45-ADF6-4A9D-A5F5-FE1B7C7C833D}\1.0
    • FLAGS
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{36434A45-ADF6-4A9D-A5F5-FE1B7C7C833D}\1.0
    • 0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{36434A45-ADF6-4A9D-A5F5-FE1B7C7C833D}\1.0\0
    • win32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{36434A45-ADF6-4A9D-A5F5-FE1B7C7C833D}\1.0
    • HELPDIR
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface
    • {33552FEB-9696-463B-8890-321E87DEB830}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{33552FEB-9696-463B-8890-321E87DEB830}
    • ProxyStubClsid
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{33552FEB-9696-463B-8890-321E87DEB830}
    • ProxyStubClsid32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{33552FEB-9696-463B-8890-321E87DEB830}
    • TypeLib
  • In HKEY_CURRENT_USER\Software\poppin
    • dinto
  • In HKEY_CURRENT_USER\Software
    • searchlinenc
  • In HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Uninstall
    • PoppinSearch uninstall
  • In HKEY_CLASSES_ROOT\CLSID
    • HOOK_ID
  • In HKEY_CLASSES_ROOT\CLSID
    • SYS_DLL
  • In HKEY_CURRENT_USER\software
    • Exchangaps

Step 5

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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • PoppinSearchUpDates = "%Program Files%\PoppinSearch\poppind.exe"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • PoppinSearch = "%Program Files%\PoppinSearch\poppins.exe Runcmd"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID\poppins.DLL
    • AppID = "{33843C8D-C52F-4661-B3E9-34E012BA97F8}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{897A1BC8-4CF0-48F7-AD60-6BF6D5D5B347}\InprocServer32
    • ThreadingModel = "Apartment"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{897A1BC8-4CF0-48F7-AD60-6BF6D5D5B347}
    • AppID = "{33843C8D-C52F-4661-B3E9-34E012BA97F8}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{897A1BC8-4CF0-48F7-AD60-6BF6D5D5B347}
    • NoExplorer = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{33552FEB-9696-463B-8890-321E87DEB830}\TypeLib
    • Version = "1.0"
  • In HKEY_CURRENT_USER\Software\poppin\dinto
    • Ver_Sb1 = "20141117"
  • In HKEY_CURRENT_USER\Software\poppin\dinto
    • Ver_Sb2 = "20141117"
  • In HKEY_CURRENT_USER\Software\searchlinenc
    • verupin = "20141117"
  • In HKEY_CURRENT_USER\Software\poppin
    • cid = "poppin_c"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\PoppinSearch uninstall
    • DisplayName = "Poppin Search"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\PoppinSearch uninstall
    • UninstallString = "%Program Files%\PoppinSearch\uninstall.exe "
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\PoppinSearch uninstall
    • DisplayIcon = "%Program Files%\PoppinSearch\uninstall.exe "
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\HOOK_ID
    • name = "e290.exe"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\6eb8fa5d
    • Type = "1"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\6eb8fa5d
    • ErrorControl = "1"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\6eb8fa5d
    • Start = "1"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\6eb8fa5d
    • ImagePath = "\??\%System%\drivers\6eb8fa5d.sys"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\SYS_DLL
    • name = "tJgHlydfT.dll"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\1213cfdb
    • Type = "1"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\1213cfdb
    • ErrorControl = "1"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\1213cfdb
    • Start = "1"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\1213cfdb
    • ImagePath = "\??\%System%\drivers\1213cfdb.sys"
  • In HKEY_CURRENT_USER\Software\poppin\dinto
    • poppinddcdata = "20141124"

Step 6

Search and delete these components

[ Learn More ]
There may be some components 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%\e290.exe
  • %User Temp%\nsn6.tmp
  • %User Temp%\nsx8.tmp\KillProcDLL.dll
  • %User Temp%\nsx8.tmp\FindProcDLL.dll
  • %Program Files%\PoppinSearch\poppins.dll
  • %Program Files%\PoppinSearch\poppind.exe
  • %Program Files%\PoppinSearch\poppins.exe
  • %User Temp%\nsx8.tmp\version.dll
  • %Program Files%\PoppinSearch\uninstall.exe
  • %User Temp%\nsx8.tmp\DLLWebCount.dll
  • %User Temp%\nsx8.tmp\SelfDelete.dll
  • \DelUS.bat
  • %User Temp%\A1.zip
  • %User Temp%\B1.zip
  • %User Temp%\C1.zip
  • %User Temp%\D1.zip
  • %User Temp%\yhsys\doit.rar
  • %System%\drivers\6eb8fa5d.sys
  • %User Temp%\yDy8he.dll
  • %User Temp%\tJgHlydfT.dll
  • %System%\drivers\1213cfdb.sys
  • %System%\ws2tcpip.dll
  • %System%\midimap.dll

Step 7

Search and delete these folders

[ 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.
  • %System Root%\DOCUME~1
  • %System Root%\DOCUME~1\Wilbert
  • %User Profile%\LOCALS~1
  • %User Temp%\nsx8.tmp
  • %Program Files%\PoppinSearch
  • %User Temp%\yhsys

Step 8

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_ESTIWIR.P. 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.

Step 9

Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.

  • %User Temp%\nsn4.tmp
  • %User Temp%\nsx8.tmp
  • %System%\Drivers\EstRtw.sys
  • %User Profile%\Cookies\index.dat
  • %User Temp%\e290.exe
  • %System Root%\DelUS.bat

Step 10

Restore these deleted registry keys/values from backup

*Note: Only Microsoft-related keys/values will be restored. If the malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.

  • In HKEY_CLASSES_ROOT\CLSID
    • TANG2_OTP
  • In HKEY_CLASSES_ROOT\CLSID
    • HOK_OTP
  • In HKEY_CLASSES_ROOT\CLSID
    • TANG1_NCP
  • In HKEY_CLASSES_ROOT\CLSID
    • TANG1_URL
  • In HKEY_CLASSES_ROOT\CLSID
    • AH3SEC
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects
    • {18DF081C-E8AD-4283-A596-FA578C2EBDC3}
  • In HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\6eb8fa5d
    • Enum
  • In HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\6eb8fa5d
    • Security
  • In HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\1213cfdb
    • Enum
  • In HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\1213cfdb
    • Security


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