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Threat Encyclopedia

BKDR_VBOT.A

ANALYSIS BY

adel


PLATFORM:

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

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

  • Threat Type:Backdoor

  • Destructiveness:No

  • Encrypted: No

  • In the wild: Yes

OVERVIEW

TECHNICAL DETAILS

SOLUTION

Minimum Scan Engine:

8.900

FIRST VSAPI PATTERN FILE:

6.964.01

FIRST VSAPI PATTERN DATE:

31 Mar 2010

VSAPI OPR PATTERN File:

6.965.00

VSAPI OPR PATTERN Date:

01 Apr 2010

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Remove malware files dropped/downloaded by BKDR_VBOT.A

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\Run
    • Microsoft Office quick launch = %Program Files%\Microsoft Office\OFFICE11\OSA.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    • Microsoft Office quick launch = %Program Files%\Microsoft Office\OFFICE11\OSA.exe

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.
  • %Program Files%\Adobe\zf32.dll
  • %Program Files%\Windows Defender\MPClient.exe
  • %Program Files%\Windows Defender\MPSvc.exe
  • %Program Files%\Windows NT\Windows Update\wuauclt.exe
  • %Program Files%\Windows NT\Windows Update\zf32.dll
  • %System%\Setup\jucheck.exe
  • %System%\Setup\MPClient.exe
  • %System%\Setup\MPSvc.exe
  • %System%\Setup\zf32.dll

Step 5

Scan your computer with your Trend Micro product to delete files detected as BKDR_VBOT.A. 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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