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TSPY_FAREIT.AYF

June 06, 2013
 Analysis by: Nikko Tamana
 ALIASES:

W32/Kryptik.AGAJ!tr (Fortinet), W32/Trojan3.FIO (FProt), Trojan-PSW.Win32.Tepfer.lhqs (Kaspersky)

 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

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

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This spyware arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It may be downloaded by other malware/grayware/spyware from remote sites.

It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

It connects to certain websites to send and receive information.

  TECHNICAL DETAILS

File Size:

121,856 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

29 May 2013

Arrival Details

This spyware arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

It may be downloaded by other malware/grayware/spyware from remote sites.

Installation

This spyware drops the following file(s)/component(s):

  • %User Temp%\{random numbers}.bat

(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, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)

Other System Modifications

This spyware adds the following registry entries:

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

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

Download Routine

This spyware connects to the following website(s) to download and execute a malicious file:

  • http://{BLOCKED}i.com/yQGKPkM.exe
  • http://00ec303.{BLOCKED}host.com/6HzJKv4A.exe
  • http://{BLOCKED}rpsgk.se/6s6JE.exe
  • http://gnqlawyers.com/yNLBr7k6.exe

It saves the files it downloads using the following names:

  • %User Temp%\{random number}.exe

(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, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)

It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

Other Details

This spyware connects to the following website to send and receive information:

  • http://talentos.{BLOCKED}n1.com:81/forum/viewtopic.php
  • http://panama.{BLOCKED}n1.com:81/forum/viewtopic.php
  • http://monteazul.{BLOCKED}n1.com:81/forum/viewtopic.php
  • http://{BLOCKED}.184.198:81/forum/viewtopic.php