TSPY_CARBERP.FPU


 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This spyware 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:

7,339,391 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

21 Feb 2014

Arrival Details

This spyware 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 spyware drops the following copies of itself into the affected system:

  • %User Profile%\Application Data\video.exe

(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

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
CWS08D101 = "%User Profile%\Application Data\video.exe"

Other System Modifications

This spyware adds the following registry keys:

HKEY_CURRENT_USER\SOFTWARE\vTask

HKEY_CURRENT_USER\SOFTWARE\vTask\
Accelerators

HKEY_CURRENT_USER\SOFTWARE\vTask\
UserVariables

It adds the following registry entries:

HKEY_CURRENT_USER\Software\vTask
RunTrackingShow = "0"

HKEY_CURRENT_USER\Software\vTask
LogLevel = "0"

HKEY_CURRENT_USER\Software\vTask
HiliteRunningStep = "0"

HKEY_CURRENT_USER\Software\vTask\
Accelerators
Stop = "00"

HKEY_CURRENT_USER\Software\vTask\
UserVariables
parameter1 = "{malware path and file name}"

HKEY_CURRENT_USER\Software\vTask\
UserVariables
parameter2 = "%User Startup%\Wilbert.exe"

HKEY_CURRENT_USER\Software\vTask\
UserVariables
parameter3 = "0 "

HKEY_CURRENT_USER\Software\vTask\
UserVariables
parameter4 = [REG_EXPAND_SZ, value: ]

HKEY_CURRENT_USER\Software\vTask\
UserVariables
parameter5 = [REG_EXPAND_SZ, value: ]

HKEY_CURRENT_USER\Software\vTask\
UserVariables
parameter6 = [REG_EXPAND_SZ, value: ]

HKEY_CURRENT_USER\Software\vTask\
UserVariables
parameter7 = [REG_EXPAND_SZ, value: ]

HKEY_CURRENT_USER\Software\vTask\
UserVariables
parameter8 = [REG_EXPAND_SZ, value: ]

HKEY_CURRENT_USER\Software\vTask\
UserVariables
parameter9 = [REG_EXPAND_SZ, value: ]

HKEY_CURRENT_USER\Software\vTask\
UserVariables
parameter10 = [REG_EXPAND_SZ, value: ]

HKEY_CURRENT_USER\Software\vTask\
UserVariables
parameter11 = [REG_EXPAND_SZ, value: ]

HKEY_CURRENT_USER\Software\vTask\
UserVariables
parameter12 = [REG_EXPAND_SZ, value: ]

HKEY_CURRENT_USER\Software\vTask\
UserVariables
parameter2 = "%User Profile%\Application Data\video.exe"

HKEY_CURRENT_USER\Software\vTask
FailStep = "12b"

HKEY_CURRENT_USER\Software\vTask
FailStep = "12c"

Dropping Routine

This spyware drops the following files:

  • %User Startup%\Wilbert.exe

(Note: %User Startup% is the current user's Startup folder, which is usually C:\Windows\Profiles\{user name}\Start Menu\Programs\Startup on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu\Programs\Startup on Windows NT, and C:\Documents and Settings\{User name}\Start Menu\Programs\Startup.)

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.300

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

Restart in Safe Mode

[ Learn More ]

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
    • vTask
  • In HKEY_CURRENT_USER\SOFTWARE\vTask
    • Accelerators
  • In HKEY_CURRENT_USER\SOFTWARE\vTask
    • UserVariables

Step 4

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
    • CWS08D101 = "%User Profile%\Application Data\video.exe"
  • In HKEY_CURRENT_USER\Software\vTask
    • RunTrackingShow = "0"
  • In HKEY_CURRENT_USER\Software\vTask
    • LogLevel = "0"
  • In HKEY_CURRENT_USER\Software\vTask
    • HiliteRunningStep = "0"
  • In HKEY_CURRENT_USER\Software\vTask\Accelerators
    • Stop = "00"
  • In HKEY_CURRENT_USER\Software\vTask\UserVariables
    • parameter1 = "{malware path and file name}"
  • In HKEY_CURRENT_USER\Software\vTask\UserVariables
    • parameter2 = "%User Startup%\Wilbert.exe"
  • In HKEY_CURRENT_USER\Software\vTask\UserVariables
    • parameter3 = "0 "
  • In HKEY_CURRENT_USER\Software\vTask\UserVariables
    • parameter4 = [REG_EXPAND_SZ, value: ]
  • In HKEY_CURRENT_USER\Software\vTask\UserVariables
    • parameter5 = [REG_EXPAND_SZ, value: ]
  • In HKEY_CURRENT_USER\Software\vTask\UserVariables
    • parameter6 = [REG_EXPAND_SZ, value: ]
  • In HKEY_CURRENT_USER\Software\vTask\UserVariables
    • parameter7 = [REG_EXPAND_SZ, value: ]
  • In HKEY_CURRENT_USER\Software\vTask\UserVariables
    • parameter8 = [REG_EXPAND_SZ, value: ]
  • In HKEY_CURRENT_USER\Software\vTask\UserVariables
    • parameter9 = [REG_EXPAND_SZ, value: ]
  • In HKEY_CURRENT_USER\Software\vTask\UserVariables
    • parameter10 = [REG_EXPAND_SZ, value: ]
  • In HKEY_CURRENT_USER\Software\vTask\UserVariables
    • parameter11 = [REG_EXPAND_SZ, value: ]
  • In HKEY_CURRENT_USER\Software\vTask\UserVariables
    • parameter12 = [REG_EXPAND_SZ, value: ]
  • In HKEY_CURRENT_USER\Software\vTask\UserVariables
    • parameter2 = "%User Profile%\Application Data\video.exe"
  • In HKEY_CURRENT_USER\Software\vTask
    • FailStep = "12b"
  • In HKEY_CURRENT_USER\Software\vTask
    • FailStep = "12c"

Step 5

Search and delete this file

[ Learn More ]
There may be some 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.
  • %User Startup%\Wilbert.exe

Step 6

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_CARBERP.FPU. 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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