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TSPY_ZBOT.CAW

October 08, 2012
 Modified by: Marfel Tiamzon
 PLATFORM:

Windows 2000, XP, Server 2003

 OVERALL RISK RATING:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:
 INFORMATION EXPOSURE:

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW


This spyware attempts to steal sensitive online banking information, such as user names and passwords. This routine risks the exposure of the user's account information, which may then lead to the unauthorized use of the stolen data. Once users access any of the monitored sites, it starts logging keystrokes. It attempts to steal information, such as user names and passwords, used when logging into certain banking or finance-related websites.

  TECHNICAL DETAILS

File Size:

32,096 bytes

File Type:

PE

Memory Resident:

Yes

Initial Samples Received Date:

17 Aug 2010

Payload:

Downloads files

Infection Points

This spyware arrives as a file downloaded from the following URLs:

  • http://{BLOCKED}storage.com/user1/nps329/bot.exe

Installation

This spyware drops the following files:

  • %Application Data%\{random1}\{random}.exe
  • %Application Data%\{random2}\{random}.odo

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.)

It creates the following folders:

  • %Application Data%\{random1}
  • %Application Data%\{random2}

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.)

Autostart Technique

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
{BAE22A8B-9135-CC74-806A-A767CAEBF349} = %Application Data%\{random1}\{random}.exe

Other System Modifications

This spyware adds the following registry keys:

HKEY_CURRENT_USER\Software\Microsoft\
{random}

Download Routine

This spyware connects to the following URL(s) to download its configuration file:

  • http://{BLOCKED}inedata.com/dfx/cfgx.bin
  • http://{BLOCKED}tstorage.com/user1/nps329/up6/config.bin

Information Theft

This spyware attempts to steal sensitive online banking information, such as user names and passwords. This routine risks the exposure of the user's account information, which may then lead to the unauthorized use of the stolen data.

Once users access any of the monitored sites, it starts logging keystrokes.

It targets the following websites:

  • http://*myspace.com*
  • *.microsoft.com/*
  • http://*
  • http://www.hsbc.co.uk/1/2*
  • https://*bankofscotlandhalifax-online.co.uk*
  • https://*halifax-online.co.uk*
  • https://*ibank.barclays.co.uk*
  • https://psx1online.com/ft/pam/bsdfghee.js
  • https://psx1online.com/ft/pam/dfrets35g.js
  • https://psx1online.com/ft/pam/fftysdhsd.js
  • https://psx1online.com/ft/pam/gkdshgdf.js
  • https://psx1online.com/ft/pam/y.php?ct=
  • https://psx1online.com/ft/pam/y.php?f=1&ct=
  • https://psx1online.com/ft/pam/y.php?f=4&ct=
  • https://psx1online.com/ft/pam/y.php?f=5&ct=
  • https://www.hsbc.co.uk/1/2*

Note that the contents of the file, hence the list of websites to monitor, may change any time.

It attempts to steal information from the following banks and/or other financial institutions:

  • Barclays
  • HSBC
  • Halifax
  • Microsoft
  • Myspace

Stolen Information

This spyware sends the gathered information via HTTP POST to the following URL:

  • http://{BLOCKED}tstorage.com/user1/nps329/gate329.php

Variant Information

This spyware has the following MD5 hashes:

  • 8271acdbfbc0930989c7a7350746af57

It has the following SHA1 hashes:

  • 24efe829a80015f5b5dc0ec19429cb68766f45a1

  SOLUTION

Minimum Scan Engine:

8.900

VSAPI OPR PATTERN File:

7.392.1

VSAPI OPR PATTERN Date:

18 Aug 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

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
    • {BAE22A8B-9135-CC74-806A-A767CAEBF349}=%Application Data%\{random1}\{random}.exe

Step 3

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\
    • {random}

Step 4

Scan your computer with your Trend Micro product to delete files detected as TSPY_ZBOT.CAW. 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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