arrow_back
search
close

BKDR_POISON.BAT

October 08, 2012
 PLATFORM:

Windows 2000, XP, Server 2003

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

It opens a hidden Internet explorer to connect to websites to send and receive information.

This backdoor may be dropped by other malware. It may be unknowingly downloaded by a user while visiting malicious websites.

It logs a user's keystrokes to steal information.

It opens a hidden Internet Explorer window.

  TECHNICAL DETAILS

Ports:

Random TCP ports

File Size:

49,152 bytes

File Type:

PE

Memory Resident:

Yes

Initial Samples Received Date:

16 Nov 2010

Payload:

Drops files, Steals information

Arrival Details

This backdoor may be dropped by other malware.

It may be unknowingly downloaded by a user while visiting malicious websites.

Installation

This backdoor drops the following files:

  • %Windows%\tabtips.exe - also detected as BKDR_POISON.BAT
  • %Windows%\tabtips - contains the stolen information

(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.)

It injects codes into the following process(es):

  • EXPLORER.EXE
  • IEXPLORE.EXE

Autostart Technique

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
WindowsProcess = %Windows%\svchost.exe

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{19B71B88-D675-055C-0502-080703040005}
StubPath = %Windows%\tabtips.exe

Dropping Routine

This backdoor drops the following files wherein it saves the information it gathers:

  • %Windows%\tabtips

(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.)

Information Theft

This backdoor logs a user's keystrokes to steal information.

Other Details

This backdoor opens a hidden Internet Explorer window.

It does the following:

  • It opens a hidden internet explorer to connect to the following website to send and receive information:
    • {BLOCKED}nes.no-ip.org

  SOLUTION

Minimum Scan Engine:

8.900

VSAPI PATTERN File:

under testing

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

Restart in Safe Mode

[ Learn More ]

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
    • WindowsProcess = %Windows%\svchost.exe

Step 4

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\Active Setup\Installed Components
    • {19B71B88-D675-055C-0502-080703040005}

Step 5

Search and delete this file

[ 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. %Windows%\tabtips

Step 6

Scan your computer with your Trend Micro product to delete files detected as BKDR_POISON.BAT. 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.


Did this description help? Tell us how we did.