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TSPY_FAREIT.AYG

July 17, 2013
 Modified by: Alvin Bacani
 ALIASES:

PWS:Win32/Fareit.gen!C (Microsoft); Trojan-PSW.Win32.Tepfer.ldzv (Kaspersky)

 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:

118,272 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

30 May 2013

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:

  • %Application Data%\KB{Random Numbers}.exe

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming 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
KB{Random Numbers}.exe = %Application Data%\KB{Random Numbers}.exe

Other System Modifications

This spyware adds the following registry keys:

HKEY_CURRENT_USER\Software\WinRAR

It adds the following registry entries:

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

Other Details

This spyware connects to the following possibly malicious URL:

  • http://{BLOCKED}.216.107:8080
  • http://{BLOCKED}.234.138:8080
  • http://{BLOCKED}.17.180:8080
  • http://{BLOCKED}219.226:8080
  • http://{BLOCKED}.29.136:8080
  • http://{BLOCKED}5.195:8080
  • http://{BLOCKED}.55.163:8080
  • http://{BLOCKED}23.100:8080
  • http://{BLOCKED}.74.5:8080
  • http://{BLOCKED}18.120:8080
  • http://{BLOCKED}129.95:8080
  • http://{BLOCKED}6.2:8080
  • http://{BLOCKED}130.98:8080
  • http://{BLOCKED}135.227:8080
  • http://{BLOCKED}30.185:8080
  • http://{BLOCKED}.98.131:8080/asp/intro.php
  • http://{BLOCKED}.208.180:8080/asp/intro.php
  • http://{BLOCKED}116.38:8080/asp/intro.php
  • http://{BLOCKED}.22.68:8080/asp/intro.php
  • http://{BLOCKED}.211.51:8080/asp/intro.php
  • http://{BLOCKED}.248.85:8080/asp/intro.php
  • http://{BLOCKED}205.188:8080/asp/intro.php
  • http://{BLOCKED}103.221:8080/asp/intro.php
  • http://{BLOCKED}142.223:8080/asp/intro.php
  • http://{BLOCKED}62.51:8080/asp/intro.php

  SOLUTION

Minimum Scan Engine:

9.300

FIRST VSAPI PATTERN FILE:

9.950.02

FIRST VSAPI PATTERN DATE:

28 May 2013

VSAPI OPR PATTERN File:

10.123.00

VSAPI OPR PATTERN Date:

28 Jul 2013

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

Scan your computer with your Trend Micro product and note files detected as TSPY_FAREIT.AYG

Step 3

Search and delete the files detected as TSPY_FAREIT.AYG

*Note: Some component files may be 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.

To stop the malware/grayware from running when certain files are opened:

For Windows 2000, Windows XP, and Windows Server 2003:

  1. Right-click Start then click Search....
  2. In the Named input box, type the name of the file that was detected earlier.
  3. In the Look In drop-down list, select My Computer then press Enter.
  4. Once located, select the file then press SHIFT+DELETE to delete it.

For Windows Vista and Windows 7:

  1. Click Start>Computer.
  2. In the Search Computer input box, type the name of the file detected earlier, and press Enter.
  3. Once located, select the file then press SHIFT+DELETE to delete it.
    *Note: Read the following Microsoft page if these steps do not work on Windows 7.

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\WinRAR
    • HWID = "{random values}"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • KB{Random Numbers}.exe = "%Application Data%\KB{Random Numbers}.exe

Step 5

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