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TSPY_FAREIT.EF

October 18, 2012
 ALIASES:

PWS:Win32/Fareit.gen!E (Microsoft); PWS-Zbot.gen.aiz (McAfee); Trojan.Win32.Generic!BT (Sunbelt)

 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.

It deletes itself after execution.

  TECHNICAL DETAILS

File Size:

91,429 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

18 Oct 2012

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 creates the following folders:

  • %User Profile%\Application Data\Soijaw
  • %User Profile%\Application Data\Xuxoq

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

Other System Modifications

This spyware adds the following registry keys:

HKEY_CURRENT_USER\Software\WinRAR

HKEY_CURRENT_USER\Software\Microsoft\
Upyde

HKEY_CURRENT_USER\Software\Microsoft\
Iwahb

It adds the following registry entries:

HKEY_CURRENT_USER\Software\WinRAR
HWID = "{random values}"

HKEY_CURRENT_USER\Software\WinRAR
Client Hash = "{random values}"

HKEY_CURRENT_USER\Software\WinRAR
0FCAD2E68268C40E4E414859CF2608C9 = "{random values}"

HKEY_CURRENT_USER\Software\Microsoft\
Upyde
2egah5cd = "{random values}"

Dropping Routine

This spyware drops the following files:

  • %User Temp%\55796.exe
  • %User Temp%\60921.exe
  • %User Profile%\Application Data\Soijaw
  • %User Profile%\Soijaw\uqjiu.exe
  • %Application Data%\tynojy.ogy
  • %User Profile%\Application Data\Xuxoq
  • %User Profile%\Xuxoq\uqku.exe
  • %Application Data%\veygw.dyf

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

Other Details

This spyware deletes itself after execution.

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.200

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 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
    • WinRAR
  • In HKEY_CURRENT_USER\Software\Microsoft
    • Upyde
  • In HKEY_CURRENT_USER\Software\Microsoft
    • Iwahb

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\WinRAR
    • HWID = "{random values}"
  • In HKEY_CURRENT_USER\Software\WinRAR
    • Client Hash = "{random values}"
  • In HKEY_CURRENT_USER\Software\WinRAR
    • 0FCAD2E68268C40E4E414859CF2608C9 = "{random values}"
  • In HKEY_CURRENT_USER\Software\Microsoft\Upyde
    • 2egah5cd = "{random values}"

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.
  • %User Temp%\55796.exe
  • %User Temp%\60921.exe
  • %User Profile%\Application Data\Soijaw
  • %User Profile%\Soijaw\uqjiu.exe
  • %Application Data%\tynojy.ogy
  • %User Profile%\Application Data\Xuxoq
  • %User Profile%\Xuxoq\uqku.exe
  • %Application Data%\veygw.dyf

Step 5

Search and delete these folders

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
  • %User Profile%\Application Data\Soijaw
  • %User Profile%\Application Data\Xuxoq

Step 6

Scan your computer with your Trend Micro product to delete files detected as TSPY_FAREIT.EF. 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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