BKDR_ZEGOST.ML


 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • 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.

  TECHNICAL DETAILS

File Size:

4,876,763 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

09 Oct 2013

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 creates the following folders:

  • %System Root%\DOCUME~1
  • %System Root%\DOCUME~1\Wilbert
  • %User Profile%\LOCALS~1
  • %User Temp%\nsj3.tmp
  • %Program Files%\script
  • %User Temp%\BLiveUp
  • %User Temp%\BLiveUp\0

(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 backdoor deletes the following files:

  • %User Temp%\nse1.tmp
  • %User Temp%\nsj3.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_CLASSES_ROOT\QMDispatch.QMFunction.1

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
QMDispatch.QMFunction.1\CLSID

HKEY_CLASSES_ROOT\QMDispatch.QMFunction

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
QMDispatch.QMFunction\CLSID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
QMDispatch.QMFunction\CurVer

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{EF94624F-EAAE-47CA-BE5B-86FDBF0B2BBA}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{EF94624F-EAAE-47CA-BE5B-86FDBF0B2BBA}\ProgID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{EF94624F-EAAE-47CA-BE5B-86FDBF0B2BBA}\VersionIndependentProgID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{EF94624F-EAAE-47CA-BE5B-86FDBF0B2BBA}\Programmable

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{EF94624F-EAAE-47CA-BE5B-86FDBF0B2BBA}\InprocServer32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{EF94624F-EAAE-47CA-BE5B-86FDBF0B2BBA}\TypeLib

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{5FD5723F-D6F6-4F31-A7D0-318E72D28E80}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{5FD5723F-D6F6-4F31-A7D0-318E72D28E80}\1.0

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{5FD5723F-D6F6-4F31-A7D0-318E72D28E80}\1.0\
FLAGS

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{5FD5723F-D6F6-4F31-A7D0-318E72D28E80}\1.0\
0

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{5FD5723F-D6F6-4F31-A7D0-318E72D28E80}\1.0\
0\win32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{5FD5723F-D6F6-4F31-A7D0-318E72D28E80}\1.0\
HELPDIR

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{DF4F905C-0961-4464-8460-DD2A1F274D1F}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{DF4F905C-0961-4464-8460-DD2A1F274D1F}\ProxyStubClsid

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{DF4F905C-0961-4464-8460-DD2A1F274D1F}\ProxyStubClsid32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{DF4F905C-0961-4464-8460-DD2A1F274D1F}\TypeLib

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
VBScript\OLEScript

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
VBS\OLEScript

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{B54F3741-5B07-11cf-A4B0-00AA004A55E8}\OLEScript

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
VBScript Author\OLEScript

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
VBS Author\OLEScript

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{B54F3742-5B07-11cf-A4B0-00AA004A55E8}\OLEScript

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
VBScript.Encode\OLEScript

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{B54F3743-5B07-11cf-A4B0-00AA004A55E8}\OLEScript

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
VBScript.RegExp\OLEScript

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{3F4DACA4-160D-11D2-A8E9-00104B365C9F}\OLEScript

HKEY_CURRENT_USER\Software\MacroMgr

HKEY_CURRENT_USER\Software\MacroMgr\
QMacro6

HKEY_CURRENT_USER\Software\MacroMgr\
QMacro6\Settings

HKEY_CLASSES_ROOT\CLSID\{EBEB87A4-E151-4054-AB45-A6E094C5334B}

HKEY_CLASSES_ROOT\CLSID\{EBEB87A4-E151-4054-AB45-A6E094C5334B}\
ProgID

HKEY_CLASSES_ROOT\CLSID\{EBEB87A4-E151-4054-AB45-A6E094C5334B}\
InprocHandler32

HKEY_CLASSES_ROOT\CLSID\{EBEB87A4-E151-4054-AB45-A6E094C5334B}\
LocalServer32

HKEY_CURRENT_USER\Software\MacroMgr\
QMacro6\Settings\ControlBars-Summary

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\International\CpMRU

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{EF94624F-EAAE-47CA-BE5B-86FDBF0B2BBA}\InprocServer32
ThreadingModel = "Apartment"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{DF4F905C-0961-4464-8460-DD2A1F274D1F}\TypeLib
Version = "1.0"

HKEY_CLASSES_ROOT
VBScript = "VB Script Language"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
VBScript
CLSID = "{B54F3741-5B07-11cf-A4B0-00AA004A55E8}"

HKEY_CLASSES_ROOT
VBS = "VB Script Language"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
VBS
CLSID = "{B54F3741-5B07-11cf-A4B0-00AA004A55E8}"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID
{B54F3741-5B07-11cf-A4B0-00AA004A55E8} = "VB Script Language"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{B54F3741-5B07-11cf-A4B0-00AA004A55E8}
ProgID = "VBScript"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{B54F3741-5B07-11cf-A4B0-00AA004A55E8}
InprocServer32 = "%System%\VBScript.dll"

HKEY_CLASSES_ROOT
VBScript Author = "VB Script Language Authoring"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
VBScript Author
CLSID = "{B54F3742-5B07-11cf-A4B0-00AA004A55E8}"

HKEY_CLASSES_ROOT
VBS Author = "VB Script Language Authoring"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
VBS Author
CLSID = "{B54F3742-5B07-11cf-A4B0-00AA004A55E8}"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID
{B54F3742-5B07-11cf-A4B0-00AA004A55E8} = "VB Script Language Authoring"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{B54F3742-5B07-11cf-A4B0-00AA004A55E8}
ProgID = "VBScript Author"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{B54F3742-5B07-11cf-A4B0-00AA004A55E8}
InprocServer32 = "%System%\VBScript.dll"

HKEY_CLASSES_ROOT
VBScript.Encode = "VBScript Language Encoding"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
VBScript.Encode
CLSID = "{B54F3743-5B07-11cf-A4B0-00AA004A55E8}"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID
{B54F3743-5B07-11cf-A4B0-00AA004A55E8} = "VBScript Language Encoding"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{B54F3743-5B07-11cf-A4B0-00AA004A55E8}
ProgID = "VBScript.Encode"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{B54F3743-5B07-11cf-A4B0-00AA004A55E8}
InprocServer32 = "%System%\VBScript.dll"

HKEY_CLASSES_ROOT
VBScript.RegExp = "VBScript Regular Expression"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
VBScript.RegExp
CLSID = "{3F4DACA4-160D-11D2-A8E9-00104B365C9F}"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID
{3F4DACA4-160D-11D2-A8E9-00104B365C9F} = "VBScript Regular Expression"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{3F4DACA4-160D-11D2-A8E9-00104B365C9F}
ProgID = "VBScript.RegExp"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{3F4DACA4-160D-11D2-A8E9-00104B365C9F}
InprocServer32 = "%System%\VBScript.dll"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Internet Explorer
Ver = "e27d7400"

HKEY_CLASSES_ROOT
QMCore.QMEngine = "QMCore.QMEngine"

HKEY_CLASSES_ROOT
CLSID\{EBEB87A4-E151-4054-AB45-A6E094C5334B} = "QMCore.QMEngine"

HKEY_CLASSES_ROOT
QMCore.QMEngine\CLSID = "{EBEB87A4-E151-4054-AB45-A6E094C5334B}"

HKEY_CLASSES_ROOT
CLSID\{EBEB87A4-E151-4054-AB45-A6E094C5334B}\ProgID = "QMCore.QMEngine"

HKEY_CLASSES_ROOT
CLSID\{EBEB87A4-E151-4054-AB45-A6E094C5334B}\InprocHandler32 = "ole32.dll"

HKEY_CLASSES_ROOT
CLSID\{EBEB87A4-E151-4054-AB45-A6E094C5334B}\LocalServer32 = "%Program Files%\QMacro6.exe"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\International\CpMRU
Enable = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\International\CpMRU
Size = "a"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\International\CpMRU
InitHits = "64"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\International\CpMRU
Factor = "14"

It modifies the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{0E59F1D5-1FBE-11D0-8FF2-00A0D10038BC}\InprocServer32
ThreadingModel = "Apartment"

(Note: The default value data of the said registry entry is Apartment.)

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{B54F3741-5B07-11cf-A4B0-00AA004A55E8}\InprocServer32
ThreadingModel = "Both"

(Note: The default value data of the said registry entry is Both.)

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{B54F3742-5B07-11cf-A4B0-00AA004A55E8}\InprocServer32
ThreadingModel = "Both"

(Note: The default value data of the said registry entry is Both.)

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{B54F3743-5B07-11cf-A4B0-00AA004A55E8}\InprocServer32
ThreadingModel = "Both"

(Note: The default value data of the said registry entry is Both.)

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{3F4DACA4-160D-11D2-A8E9-00104B365C9F}\InprocServer32
ThreadingModel = "Apartment"

(Note: The default value data of the said registry entry is Apartment.)

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{3F4DACA0-160D-11D2-A8E9-00104B365C9F}\TypeLib
Version = "1.0"

(Note: The default value data of the said registry entry is 5.5.)

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{3F4DACA1-160D-11D2-A8E9-00104B365C9F}\TypeLib
Version = "1.0"

(Note: The default value data of the said registry entry is 5.5.)

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{3F4DACA2-160D-11D2-A8E9-00104B365C9F}\TypeLib
Version = "1.0"

(Note: The default value data of the said registry entry is 5.5.)

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{3F4DACA0-160D-11D2-A8E9-00104B365C9F}\TypeLib
Version = "5.5"

(Note: The default value data of the said registry entry is 5.5.)

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{3F4DACA1-160D-11D2-A8E9-00104B365C9F}\TypeLib
Version = "5.5"

(Note: The default value data of the said registry entry is 5.5.)

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{3F4DACA2-160D-11D2-A8E9-00104B365C9F}\TypeLib
Version = "5.5"

(Note: The default value data of the said registry entry is 5.5.)

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{4f645220-306d-11d2-995d-00c04f98bbc9}
IsInstalled = "1"

(Note: The default value data of the said registry entry is 1.)

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{4f645220-306d-11d2-995d-00c04f98bbc9}
Version = "5,6,0,8820"

(Note: The default value data of the said registry entry is 5,6,0,8820.)

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{4f645220-306d-11d2-995d-00c04f98bbc9}
Locale = "EN"

(Note: The default value data of the said registry entry is EN.)

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{4f645220-306d-11d2-995d-00c04f98bbc9}
ComponentID = "MSVBScript"

(Note: The default value data of the said registry entry is MSVBScript.)

It deletes the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
VBScript\CLSID

HKEY_CLASSES_ROOT\VBScript

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
VBS\CLSID

HKEY_CLASSES_ROOT\VBS

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{B54F3741-5B07-11cf-A4B0-00AA004A55E8}\ProgID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{B54F3741-5B07-11cf-A4B0-00AA004A55E8}\Implemented Categories

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{B54F3741-5B07-11cf-A4B0-00AA004A55E8}\InprocServer32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{B54F3741-5B07-11cf-A4B0-00AA004A55E8}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
VBScript Author\CLSID

HKEY_CLASSES_ROOT\VBScript Author

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
VBS Author\CLSID

HKEY_CLASSES_ROOT\VBS Author

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{B54F3742-5B07-11cf-A4B0-00AA004A55E8}\ProgID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{B54F3742-5B07-11cf-A4B0-00AA004A55E8}\Implemented Categories

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{B54F3742-5B07-11cf-A4B0-00AA004A55E8}\InprocServer32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{B54F3742-5B07-11cf-A4B0-00AA004A55E8}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
VBScript.Encode\CLSID

HKEY_CLASSES_ROOT\VBScript.Encode

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{B54F3743-5B07-11cf-A4B0-00AA004A55E8}\ProgID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{B54F3743-5B07-11cf-A4B0-00AA004A55E8}\Implemented Categories

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{B54F3743-5B07-11cf-A4B0-00AA004A55E8}\InprocServer32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{B54F3743-5B07-11cf-A4B0-00AA004A55E8}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
VBScript.RegExp\CLSID

HKEY_CLASSES_ROOT\VBScript.RegExp

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{3F4DACA4-160D-11D2-A8E9-00104B365C9F}\ProgID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{3F4DACA4-160D-11D2-A8E9-00104B365C9F}\TypeLib

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{3F4DACA4-160D-11D2-A8E9-00104B365C9F}\Version

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{3F4DACA4-160D-11D2-A8E9-00104B365C9F}\InprocServer32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{3F4DACA4-160D-11D2-A8E9-00104B365C9F}

HKEY_CURRENT_USER\SOFTWARE\MacroMgr\
QMacro6\Settings

Dropping Routine

This backdoor drops the following files:

  • %User Temp%\nsj3.tmp\System.dll
  • %System Root%\ºñ±ØÀ̱î²á ¸ÅÅ©·Î½ÇÇà.exe
  • %System Root%\svchost.exe
  • %System%\tmpad.xml
  • %Program Files%\script\stdlib.vbs
  • %Windows%\QMDispatch.dll
  • %System%\tdf.dll

(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.. %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %System% is the Windows system folder, which is usually C:\Windows\System32.. %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).. %Windows% is the Windows folder, which is usually C:\Windows.)

Other Details

This backdoor connects to the following possibly malicious URL:

  • http://down.{BLOCKED}hers.com/qmacro/eng_upgrade/ver.xml
  • http://www.{BLOCKED}hers.com/user_fairy.asp?{random characters}

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.300

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

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_CLASSES_ROOT
    • QMDispatch.QMFunction.1
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\QMDispatch.QMFunction.1
    • CLSID
  • In HKEY_CLASSES_ROOT
    • QMDispatch.QMFunction
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\QMDispatch.QMFunction
    • CLSID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\QMDispatch.QMFunction
    • CurVer
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
    • {EF94624F-EAAE-47CA-BE5B-86FDBF0B2BBA}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{EF94624F-EAAE-47CA-BE5B-86FDBF0B2BBA}
    • ProgID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{EF94624F-EAAE-47CA-BE5B-86FDBF0B2BBA}
    • VersionIndependentProgID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{EF94624F-EAAE-47CA-BE5B-86FDBF0B2BBA}
    • Programmable
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{EF94624F-EAAE-47CA-BE5B-86FDBF0B2BBA}
    • InprocServer32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{EF94624F-EAAE-47CA-BE5B-86FDBF0B2BBA}
    • TypeLib
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib
    • {5FD5723F-D6F6-4F31-A7D0-318E72D28E80}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{5FD5723F-D6F6-4F31-A7D0-318E72D28E80}
    • 1.0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{5FD5723F-D6F6-4F31-A7D0-318E72D28E80}\1.0
    • FLAGS
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{5FD5723F-D6F6-4F31-A7D0-318E72D28E80}\1.0
    • 0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{5FD5723F-D6F6-4F31-A7D0-318E72D28E80}\1.0\0
    • win32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{5FD5723F-D6F6-4F31-A7D0-318E72D28E80}\1.0
    • HELPDIR
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface
    • {DF4F905C-0961-4464-8460-DD2A1F274D1F}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{DF4F905C-0961-4464-8460-DD2A1F274D1F}
    • ProxyStubClsid
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{DF4F905C-0961-4464-8460-DD2A1F274D1F}
    • ProxyStubClsid32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{DF4F905C-0961-4464-8460-DD2A1F274D1F}
    • TypeLib
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\VBScript
    • OLEScript
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\VBS
    • OLEScript
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B54F3741-5B07-11cf-A4B0-00AA004A55E8}
    • OLEScript
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\VBScript Author
    • OLEScript
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\VBS Author
    • OLEScript
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B54F3742-5B07-11cf-A4B0-00AA004A55E8}
    • OLEScript
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\VBScript.Encode
    • OLEScript
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B54F3743-5B07-11cf-A4B0-00AA004A55E8}
    • OLEScript
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\VBScript.RegExp
    • OLEScript
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{3F4DACA4-160D-11D2-A8E9-00104B365C9F}
    • OLEScript
  • In HKEY_CURRENT_USER\Software
    • MacroMgr
  • In HKEY_CURRENT_USER\Software\MacroMgr
    • QMacro6
  • In HKEY_CURRENT_USER\Software\MacroMgr\QMacro6
    • Settings
  • In HKEY_CLASSES_ROOT\CLSID
    • {EBEB87A4-E151-4054-AB45-A6E094C5334B}
  • In HKEY_CLASSES_ROOT\CLSID\{EBEB87A4-E151-4054-AB45-A6E094C5334B}
    • ProgID
  • In HKEY_CLASSES_ROOT\CLSID\{EBEB87A4-E151-4054-AB45-A6E094C5334B}
    • InprocHandler32
  • In HKEY_CLASSES_ROOT\CLSID\{EBEB87A4-E151-4054-AB45-A6E094C5334B}
    • LocalServer32
  • In HKEY_CURRENT_USER\Software\MacroMgr\QMacro6\Settings
    • ControlBars-Summary
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\International
    • CpMRU

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\Classes\CLSID\{EF94624F-EAAE-47CA-BE5B-86FDBF0B2BBA}\InprocServer32
    • ThreadingModel = "Apartment"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{DF4F905C-0961-4464-8460-DD2A1F274D1F}\TypeLib
    • Version = "1.0"
  • In HKEY_CLASSES_ROOT
    • VBScript = "VB Script Language"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\VBScript
    • CLSID = "{B54F3741-5B07-11cf-A4B0-00AA004A55E8}"
  • In HKEY_CLASSES_ROOT
    • VBS = "VB Script Language"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\VBS
    • CLSID = "{B54F3741-5B07-11cf-A4B0-00AA004A55E8}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
    • {B54F3741-5B07-11cf-A4B0-00AA004A55E8} = "VB Script Language"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B54F3741-5B07-11cf-A4B0-00AA004A55E8}
    • ProgID = "VBScript"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B54F3741-5B07-11cf-A4B0-00AA004A55E8}
    • InprocServer32 = "%System%\VBScript.dll"
  • In HKEY_CLASSES_ROOT
    • VBScript Author = "VB Script Language Authoring"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\VBScript Author
    • CLSID = "{B54F3742-5B07-11cf-A4B0-00AA004A55E8}"
  • In HKEY_CLASSES_ROOT
    • VBS Author = "VB Script Language Authoring"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\VBS Author
    • CLSID = "{B54F3742-5B07-11cf-A4B0-00AA004A55E8}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
    • {B54F3742-5B07-11cf-A4B0-00AA004A55E8} = "VB Script Language Authoring"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B54F3742-5B07-11cf-A4B0-00AA004A55E8}
    • ProgID = "VBScript Author"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B54F3742-5B07-11cf-A4B0-00AA004A55E8}
    • InprocServer32 = "%System%\VBScript.dll"
  • In HKEY_CLASSES_ROOT
    • VBScript.Encode = "VBScript Language Encoding"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\VBScript.Encode
    • CLSID = "{B54F3743-5B07-11cf-A4B0-00AA004A55E8}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
    • {B54F3743-5B07-11cf-A4B0-00AA004A55E8} = "VBScript Language Encoding"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B54F3743-5B07-11cf-A4B0-00AA004A55E8}
    • ProgID = "VBScript.Encode"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B54F3743-5B07-11cf-A4B0-00AA004A55E8}
    • InprocServer32 = "%System%\VBScript.dll"
  • In HKEY_CLASSES_ROOT
    • VBScript.RegExp = "VBScript Regular Expression"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\VBScript.RegExp
    • CLSID = "{3F4DACA4-160D-11D2-A8E9-00104B365C9F}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
    • {3F4DACA4-160D-11D2-A8E9-00104B365C9F} = "VBScript Regular Expression"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{3F4DACA4-160D-11D2-A8E9-00104B365C9F}
    • ProgID = "VBScript.RegExp"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{3F4DACA4-160D-11D2-A8E9-00104B365C9F}
    • InprocServer32 = "%System%\VBScript.dll"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer
    • Ver = "e27d7400"
  • In HKEY_CLASSES_ROOT
    • QMCore.QMEngine = "QMCore.QMEngine"
  • In HKEY_CLASSES_ROOT
    • CLSID\{EBEB87A4-E151-4054-AB45-A6E094C5334B} = "QMCore.QMEngine"
  • In HKEY_CLASSES_ROOT
    • QMCore.QMEngine\CLSID = "{EBEB87A4-E151-4054-AB45-A6E094C5334B}"
  • In HKEY_CLASSES_ROOT
    • CLSID\{EBEB87A4-E151-4054-AB45-A6E094C5334B}\ProgID = "QMCore.QMEngine"
  • In HKEY_CLASSES_ROOT
    • CLSID\{EBEB87A4-E151-4054-AB45-A6E094C5334B}\InprocHandler32 = "ole32.dll"
  • In HKEY_CLASSES_ROOT
    • CLSID\{EBEB87A4-E151-4054-AB45-A6E094C5334B}\LocalServer32 = "%Program Files%\QMacro6.exe"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\International\CpMRU
    • Enable = "1"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\International\CpMRU
    • Size = "a"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\International\CpMRU
    • InitHits = "64"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\International\CpMRU
    • Factor = "14"

Step 4

Restore these modified registry values

[ Learn More ]

Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.

  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{0E59F1D5-1FBE-11D0-8FF2-00A0D10038BC}\InprocServer32
    • From: ThreadingModel = "Apartment"
      To: ThreadingModel = ""Apartment""
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B54F3741-5B07-11cf-A4B0-00AA004A55E8}\InprocServer32
    • From: ThreadingModel = "Both"
      To: ThreadingModel = ""Both""
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B54F3742-5B07-11cf-A4B0-00AA004A55E8}\InprocServer32
    • From: ThreadingModel = "Both"
      To: ThreadingModel = ""Both""
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B54F3743-5B07-11cf-A4B0-00AA004A55E8}\InprocServer32
    • From: ThreadingModel = "Both"
      To: ThreadingModel = ""Both""
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{3F4DACA4-160D-11D2-A8E9-00104B365C9F}\InprocServer32
    • From: ThreadingModel = "Apartment"
      To: ThreadingModel = ""Apartment""
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{3F4DACA0-160D-11D2-A8E9-00104B365C9F}\TypeLib
    • From: Version = "1.0"
      To: Version = ""5.5""
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{3F4DACA1-160D-11D2-A8E9-00104B365C9F}\TypeLib
    • From: Version = "1.0"
      To: Version = ""5.5""
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{3F4DACA2-160D-11D2-A8E9-00104B365C9F}\TypeLib
    • From: Version = "1.0"
      To: Version = ""5.5""
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{3F4DACA0-160D-11D2-A8E9-00104B365C9F}\TypeLib
    • From: Version = "5.5"
      To: Version = ""5.5""
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{3F4DACA1-160D-11D2-A8E9-00104B365C9F}\TypeLib
    • From: Version = "5.5"
      To: Version = ""5.5""
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{3F4DACA2-160D-11D2-A8E9-00104B365C9F}\TypeLib
    • From: Version = "5.5"
      To: Version = ""5.5""
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{4f645220-306d-11d2-995d-00c04f98bbc9}
    • From: IsInstalled = "1"
      To: IsInstalled = ""1""
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{4f645220-306d-11d2-995d-00c04f98bbc9}
    • From: Version = "5,6,0,8820"
      To: Version = ""5,6,0,8820""
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{4f645220-306d-11d2-995d-00c04f98bbc9}
    • From: Locale = "EN"
      To: Locale = ""EN""
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{4f645220-306d-11d2-995d-00c04f98bbc9}
    • From: ComponentID = "MSVBScript"
      To: ComponentID = ""MSVBScript""

Step 5

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%\nsj3.tmp\System.dll
  • %System Root%\ºñ±ØÀ̱î²á ¸ÅÅ©·Î½ÇÇà.exe
  • %System Root%\svchost.exe
  • %System%\tmpad.xml
  • %Program Files%\script\stdlib.vbs
  • %Windows%\QMDispatch.dll
  • %System%\tdf.dll

Step 6

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%\nsj3.tmp
  • %Program Files%\script
  • %User Temp%\BLiveUp
  • %User Temp%\BLiveUp\0

Step 7

Scan your computer with your Trend Micro product to delete files detected as BKDR_ZEGOST.ML. 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 8

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%\nse1.tmp
  • %User Temp%\nsj3.tmp

Step 9

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_LOCAL_MACHINE\SOFTWARE\Classes\VBScript
    • CLSID
  • In HKEY_CLASSES_ROOT
    • VBScript
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\VBS
    • CLSID
  • In HKEY_CLASSES_ROOT
    • VBS
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B54F3741-5B07-11cf-A4B0-00AA004A55E8}
    • ProgID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B54F3741-5B07-11cf-A4B0-00AA004A55E8}
    • Implemented Categories
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B54F3741-5B07-11cf-A4B0-00AA004A55E8}
    • InprocServer32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
    • {B54F3741-5B07-11cf-A4B0-00AA004A55E8}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\VBScript Author
    • CLSID
  • In HKEY_CLASSES_ROOT
    • VBScript Author
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\VBS Author
    • CLSID
  • In HKEY_CLASSES_ROOT
    • VBS Author
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B54F3742-5B07-11cf-A4B0-00AA004A55E8}
    • ProgID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B54F3742-5B07-11cf-A4B0-00AA004A55E8}
    • Implemented Categories
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B54F3742-5B07-11cf-A4B0-00AA004A55E8}
    • InprocServer32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
    • {B54F3742-5B07-11cf-A4B0-00AA004A55E8}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\VBScript.Encode
    • CLSID
  • In HKEY_CLASSES_ROOT
    • VBScript.Encode
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B54F3743-5B07-11cf-A4B0-00AA004A55E8}
    • ProgID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B54F3743-5B07-11cf-A4B0-00AA004A55E8}
    • Implemented Categories
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B54F3743-5B07-11cf-A4B0-00AA004A55E8}
    • InprocServer32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
    • {B54F3743-5B07-11cf-A4B0-00AA004A55E8}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\VBScript.RegExp
    • CLSID
  • In HKEY_CLASSES_ROOT
    • VBScript.RegExp
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{3F4DACA4-160D-11D2-A8E9-00104B365C9F}
    • ProgID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{3F4DACA4-160D-11D2-A8E9-00104B365C9F}
    • TypeLib
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{3F4DACA4-160D-11D2-A8E9-00104B365C9F}
    • Version
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{3F4DACA4-160D-11D2-A8E9-00104B365C9F}
    • InprocServer32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
    • {3F4DACA4-160D-11D2-A8E9-00104B365C9F}
  • In HKEY_CURRENT_USER\SOFTWARE\MacroMgr\QMacro6
    • Settings


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