BKDR_HUPIGON.ERI

June 18, 2013
 ALIASES:

Backdoor:Win32/Hupigon (Microsoft); [3.nsis\7.nsis\7.nsis\7.nsis\7.nsis]:Generic PWS.y!dbv, [3.nsis\8.nsis]:BackDoor-AWQ (McAfee); Spyware.SpyMyPC (Symantec); Monitor.Win32.KeyLoggerLite.av (Kaspersky); Active Key Logger (fs), Trojan.Win32.Generic!BT, SpyMyPC, Trojan.Win32.Generic!BT (Sunbelt); Trojan horse BackDoor.Generic7.FPJ.dropper (AVG)

 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:

836,694 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

11 Jun 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%\nsz3.tmp
  • %User Temp%\nsfD.tmp
  • %Program Files%\Active Key Logger
  • %Program Files%\Active Key Logger\syslog
  • %User Profile%\Application Data\a32l

(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%\nsk1.tmp
  • %User Temp%\nsz3.tmp
  • %User Temp%\nsf9.tmp
  • %User Temp%\nsfD.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\Microsoft\
Windows\CurrentVersion\Uninstall\
Active Key Logger

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
Active Key Loggerr

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Active Key Logger
DisplayName = "Active Key Logger"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Active Key Logger
UninstallString = "%Program Files%\Active Key Logger\Uninstall.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Active Key Logger
InstallLocation = "%Program Files%\Active Key Logger"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Active Key Logger
DisplayVersion = "3.7.3"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Active Key Logger
DisplayIcon = "%Program Files%\Active Key Logger\Active Key Logger,0"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Active Key Logger
Publisher = "Winsoul Software, INC"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Active Key Loggerr
HelpLink = "http://www.{BLOCKED}l.com"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Active Key Logger
Contact = "support@winsoul.com"

HKEY_CURRENT_USER\Control Panel\Colors
WindowNumHWND = "30333930363230343130363230333530333330333230333420"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
system
ConsentPromptBehaviorAdmin = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
system
ConsentPromptBehaviorUser = "0"

Dropping Routine

This backdoor drops the following files:

  • %System%\orange-install.ico
  • %Desktop%\¶àÌØÈí¼þÕ¾.lnk
  • %User Temp%\nsz3.tmp\activekeylogger.exe
  • %User Temp%\nsfB.tmp
  • %User Temp%\nsfD.tmp\ioC.ini
  • %User Temp%\nsfD.tmp\ioSpecial.ini
  • %User Temp%\nsfD.tmp\modern-wizard.bmp
  • %User Temp%\nsfD.tmp\modern-header.bmp
  • %User Temp%\nsfD.tmp\InstallOptions.dll
  • %Program Files%\Active Key Logger\Active Key Logger.exe
  • %Program Files%\Active Key Logger\exp32sys.dll
  • %Program Files%\Active Key Logger\win32sys.dll
  • %Program Files%\Active Key Logger\z32sys.dll
  • %Program Files%\Active Key Logger\LICENSE.TXT
  • %Program Files%\Active Key Logger\README.TXT
  • %Program Files%\Active Key Logger\Visit the Official Active Key Logger Website.url
  • %Program Files%\Active Key Logger\Active Key Logger.chm
  • %Program Files%\Active Key Logger\Uninstall.exe
  • %Start Menu%\Programs\Active Key Logger\Active Key Logger.lnk
  • %Start Menu%\Programs\Active Key Logger\Active Key Logger Help.lnk
  • %Start Menu%\Programs\Active Key Logger\Active Key Logger License Agreement.lnk
  • %Start Menu%\Programs\Active Key Logger\Visit the Official Active Key Logger Website.lnk
  • %Start Menu%\Programs\Active Key Logger\Uninstall Active Key Logger.lnk
  • %System%\msql32sys.dll

(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.. %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\Desktop 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).. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista and 7.)

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_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Uninstall
    • Active Key Logger
  • In HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Uninstall
    • Active Key Loggerr

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\Microsoft\Windows\CurrentVersion\Uninstall\Active Key Logger
    • DisplayName = "Active Key Logger"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Active Key Logger
    • UninstallString = "%Program Files%\Active Key Logger\Uninstall.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Active Key Logger
    • InstallLocation = "%Program Files%\Active Key Logger"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Active Key Logger
    • DisplayVersion = "3.7.3"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Active Key Logger
    • DisplayIcon = "%Program Files%\Active Key Logger\Active Key Logger,0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Active Key Logger
    • Publisher = "Winsoul Software, INC"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Active Key Loggerr
    • HelpLink = "http://www.{BLOCKED}l.com"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Active Key Logger
    • Contact = "support@winsoul.com"
  • In HKEY_CURRENT_USER\Control Panel\Colors
    • WindowNumHWND = "30333930363230343130363230333530333330333230333420"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system
    • ConsentPromptBehaviorAdmin = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system
    • ConsentPromptBehaviorUser = "0"

Step 4

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.
  • %System%\orange-install.ico
  • %Desktop%\¶àÌØÈí¼þÕ¾.lnk
  • %User Temp%\nsz3.tmp\activekeylogger.exe
  • %User Temp%\nsfB.tmp
  • %User Temp%\nsfD.tmp\ioC.ini
  • %User Temp%\nsfD.tmp\ioSpecial.ini
  • %User Temp%\nsfD.tmp\modern-wizard.bmp
  • %User Temp%\nsfD.tmp\modern-header.bmp
  • %User Temp%\nsfD.tmp\InstallOptions.dll
  • %Program Files%\Active Key Logger\Active Key Logger.exe
  • %Program Files%\Active Key Logger\exp32sys.dll
  • %Program Files%\Active Key Logger\win32sys.dll
  • %Program Files%\Active Key Logger\z32sys.dll
  • %Program Files%\Active Key Logger\LICENSE.TXT
  • %Program Files%\Active Key Logger\README.TXT
  • %Program Files%\Active Key Logger\Visit the Official Active Key Logger Website.url
  • %Program Files%\Active Key Logger\Active Key Logger.chm
  • %Program Files%\Active Key Logger\Uninstall.exe
  • %Start Menu%\Programs\Active Key Logger\Active Key Logger.lnk
  • %Start Menu%\Programs\Active Key Logger\Active Key Logger Help.lnk
  • %Start Menu%\Programs\Active Key Logger\Active Key Logger License Agreement.lnk
  • %Start Menu%\Programs\Active Key Logger\Visit the Official Active Key Logger Website.lnk
  • %Start Menu%\Programs\Active Key Logger\Uninstall Active Key Logger.lnk
  • %System%\msql32sys.dll

Step 5

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%\nsz3.tmp
  • %User Temp%\nsfD.tmp
  • %Program Files%\Active Key Logger
  • %Program Files%\Active Key Logger\syslog
  • %User Profile%\Application Data\a32l

Step 6

Scan your computer with your Trend Micro product to delete files detected as BKDR_HUPIGON.ERI. 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 7

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%\nsk1.tmp
  • %User Temp%\nsz3.tmp
  • %User Temp%\nsf9.tmp
  • %User Temp%\nsfD.tmp


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