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WORM_AUTORUN.XY

October 04, 2014
 ALIASES:

Worm:Win32/Autorun.gen!BN (Microsoft); W32/Autorun.worm.i.gen (McAfee); W32.SillyDC (Symantec); Worm.Win32.AutoRun.agu (Kaspersky); W32/AutoRun-BU (Sophos); Trojan.Win32.Packer.UPX-ScramblerRCv1.x (ep) (Sunbelt); I-Worm/Brontok.X (AVG)

 PLATFORM:

Windows

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

  • Threat Type: Worm

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


This worm 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:

81,408 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

04 Oct 2014

Arrival Details

This worm 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 worm creates the following folders:

  • %System Root%\Config

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

Other System Modifications

This worm adds the following registry keys:

HKEY_CURRENT_USER\SOFTWARE\Microsoft\
Windows\CurrentVersion\Policies\
Explore\Run

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Policies\
Explore\Run

HKEY_CLASSES_ROOT\CLSID\{00020D75-0000-0000-C000-0000000000AA}

HKEY_CLASSES_ROOT\CLSID\{00020D75-0000-0000-C000-0000000000AA}\
DefaultIcon

HKEY_CLASSES_ROOT\CLSID\{00020D75-0000-0000-C000-0000000000AA}\
InProcServer32

HKEY_CLASSES_ROOT\CLSID\{00020D75-0000-0000-C000-0000000000AA}\
ShellFolder

HKEY_CLASSES_ROOT\CLSID\{00020D75-0000-0000-C000-0000000000AA}\
Shell\Open\Command

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
MyComputer\NameSpace\{00020D75-0000-0000-C000-0000000000AA}

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
ControlPanel\NameSpace\{00020D75-0000-0000-C000-0000000000AA}

HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
FullHouse\01

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Explore\Run
Manager Task = "%System Root%\Config\smss.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
Explore\Run
Task Manager = "%System Root%\Config\smss.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{00020D75-0000-0000-C000-0000000000AA}\InProcServer32
ThreadingModel = "Apartment"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{00020D75-0000-0000-C000-0000000000AA}\ShellFolder
Attributes = "1"

HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
FullHouse\01
RunCount = "0"

HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
FullHouse\01
RunCount = "1"

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

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_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explore
    • Run
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explore
    • Run
  • In HKEY_CLASSES_ROOT\CLSID
    • {00020D75-0000-0000-C000-0000000000AA}
  • In HKEY_CLASSES_ROOT\CLSID\{00020D75-0000-0000-C000-0000000000AA}
    • DefaultIcon
  • In HKEY_CLASSES_ROOT\CLSID\{00020D75-0000-0000-C000-0000000000AA}
    • InProcServer32
  • In HKEY_CLASSES_ROOT\CLSID\{00020D75-0000-0000-C000-0000000000AA}
    • ShellFolder
  • In HKEY_CLASSES_ROOT\CLSID\{00020D75-0000-0000-C000-0000000000AA}\Shell\Open
    • Command
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\MyComputer\NameSpace
    • {00020D75-0000-0000-C000-0000000000AA}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\ControlPanel\NameSpace
    • {00020D75-0000-0000-C000-0000000000AA}
  • In HKEY_CURRENT_USER\Software\VB and VBA Program Settings\FullHouse
    • 01

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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explore\Run
    • Manager Task = "%System Root%\Config\smss.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explore\Run
    • Task Manager = "%System Root%\Config\smss.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{00020D75-0000-0000-C000-0000000000AA}\InProcServer32
    • ThreadingModel = "Apartment"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{00020D75-0000-0000-C000-0000000000AA}\ShellFolder
    • Attributes = "1"
  • In HKEY_CURRENT_USER\Software\VB and VBA Program Settings\FullHouse\01
    • RunCount = "0"
  • In HKEY_CURRENT_USER\Software\VB and VBA Program Settings\FullHouse\01
    • RunCount = "1"

Step 4

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.
  • %System Root%\Config

Step 5

Scan your computer with your Trend Micro product to delete files detected as WORM_AUTORUN.XY. 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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