PLATFORM:

Windows 98, ME, NT, 2000, XP, Server 2003

 OVERALL RISK RATING:
 REPORTED INFECTION:

  • Threat Type:

  • Destructiveness:

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This File Infector adds registry entries to enable its automatic execution at every system startup.



  TECHNICAL DETAILS

File Size: 162304 bytes
Initial Samples Received Date: 18 Mar 2010

Installation


This File Infector drops the following files:

    • %System%\il145587.dll
    • %System%\wincab.sys
    • %System%\amvo0.dll
    • %System%\drivers\qldge.sys
    • %User Temp%\eaxbit.dll
    • %User Temp%\~bbf14.tmp
    • %System%\il145587.dl_
    • %User Temp%\~17b268.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.)


It drops the following copies of itself into the affected system:

    • %System%\amvo.exe

(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)



Autostart Technique


This File Infector registers as a system service to ensure its automatic execution at every system startup by adding the following registry entries:


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



Other System Modifications


This File Infector adds the following registry keys:


  SOLUTION


Step 1


Terminate the malware/grayware/spyware process:

[ Learn More ]
Notes=
  • For Windows 98 and ME users, Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  • If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  • If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.


    • 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. Before you could do this, you must restart in Safe Mode. For instructions on how to do this, you may refer to this page If the preceding step requires you to restart in safe mode, you may proceed to edit the system registry.

    • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
      • xdtrdqaxd
    • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
      • MCIDRV_2600_6_0


    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.

    • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\Windows\CURRENTVERSION\Policies\SYSTEM
      • EnableLUA=0
    • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\Windows\CURRENTVERSION\Run\amva
      • %System%\amvo.exe=REG_SZ


    Step 4


    Search and delete these files

    [ Learn More ]
    There may be some component files 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%\il145587.dll
    • %System%\wincab.sys
    • %System%\amvo0.dll
    • %System%\drivers\qldge.sys
    • %User Temp%\eaxbit.dll
    • %User Temp%\~bbf14.tmp
    • %System%\il145587.dl_
    • %User Temp%\~17b268.tmp
    • %System%\amvo.exe


    Note: To do a search for the following files, right-click Start then click Search... or Find..., depending on the version of Windows you are running. For each file to be deleted, type its file name in the Named input box. In the Look In drop-down list, select My Computer, then press Enter.
  • Once located, select the file then press SHIFT+DELETE to permanently delete the file.
  • Repeat the said steps for all files listed.


    • Step 5


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

    • %Windows%\system.ini


    Step 6


    Scan your computer with your Trend Micro product to delete files detected as
    PE_SALITY.AM

    *Note: 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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