Backdoor.Win32.HUPIGON.ANW
Backdoor.Hupigon.AXRD (BITDEFENDER); Backdoor.Hupigon (IKARUS)
Windows
Threat Type: Backdoor
Destructiveness: No
Encrypted: Yes
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.
It executes commands from a remote malicious user, effectively compromising the affected system. It connects to a website to send and receive information.
TECHNICAL DETAILS
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 drops the following copies of itself into the affected system:
- %Program Files%\Common Files\microsoft shared\MSInfo\gb32.exe
- %System Root%\gb32.exe
- {Drive Letter}\gb32.exe
- %System%\_gb32.exe
(Note: %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).. %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)
It drops the following files:
- %Program Files%\Common Files\microsoft shared\MSInfo\DelSvel.bat -> responsible for deleting itself and the original sample
- %System Root%\AutoRun.inf
- {Drive Letter}\AutoRun.inf
(Note: %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).. %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.)
It adds the following processes:
- "%Program Files%\Common Files\Microsoft Shared\MSINFO\gb32.exe"
- "%System%\calc.exe"
- "%Program Files%\internet explorer\IEXPLORE.EXE"
- cmd /c ""%Program Files%\Common Files\Microsoft Shared\MSINFO\DelSvel.bat""
(Note: %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).. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)
It injects codes into the following process(es):
- Spawned %System%\calc.exe
- Spawned %Program Files%\internet explorer\IEXPLORE.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).)
Backdoor Routine
This Backdoor executes the following commands from a remote malicious user:
- Manage Files (Open, Create, Modify, Move, Copy, Delete)
- List and Terminate Processes
- Change Desktop Wallpaper
- Download and Execute Files
It connects to the following websites to send and receive information:
- http://{BLOCKED}3.3322.org
Other Details
This Backdoor does the following:
- It creates the following service:
- Service Name: Windows File slote
- ImagePath = %Program Files%\Common Files\microsoft shared\MSInfo\gb32.exe
- It needs to be ran with administrative privileges to execute malicious routine
(Note: %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).)
SOLUTION
Step 1
Trend Micro Predictive Machine Learning detects and blocks malware at the first sign of its existence, before it executes on your system. When enabled, your Trend Micro product detects this malware under the following machine learning name:
- Troj.Win32.TRX.XXPE50FFF045
Step 2
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 3
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 4
Restart in Safe Mode
Step 5
Disable this malware service
- Windows File slote
Step 6
Search and delete this file
- %Program Files%\Common Files\microsoft shared\MSInfo\gb32.exe
- %System Root%\gb32.exe
- {Drive Letter}\gb32.exe
- %System%\_gb32.exe
- %Program Files%\Common Files\microsoft shared\MSInfo\DelSvel.bat -> responsible for deleting itself and the original sample
- %System Root%\AutoRun.inf
- D:\AutoRun.inf
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as Backdoor.Win32.HUPIGON.ANW. 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.
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