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TSPY_TEPFER.GP

February 15, 2013
 Analysis by: Anthony Joe Melgarejo
 ALIASES:

PWS:Win32/Fareit.gen!I (Microsoft), W32.Qakbot (Symantec), RDN/Generic PWS.y!u (McAfee), Mal/FakeAV-OY (Sophos), Trojan.Win32.Tepfer.a (Sunbelt), W32/PWS_y.U!tr (Fortinet), Trojan-PWS.Win32.Tepfer (Ikarus)

 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 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:

132,096 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

12 Feb 2013

Arrival Details

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

It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Other System Modifications

This spyware adds the following registry entries:

HKEY_CURRENT_USER\Software\WINRAR
HWID = {random value}

HKEY_CURRENT_USER\Software\WINRAR
Client Hash = {random value}

HKEY_CURRENT_USER\Software\WINRAR
{random hex values} = {random hex values}

Download Routine

This spyware accesses the following websites to download files:

  • http://www.{BLOCKED}dwatt.at/1wi.exe
  • http://{BLOCKED}p.{BLOCKED}radezone.com/jaHyPnVB.exe
  • http://{BLOCKED}u.net/0nN.exe
  • http://{BLOCKED}8.{BLOCKED}ress.ws/5sZGsXu.exe
  • http://{BLOCKED}og.at/fiia2c2.exe
  • http://{BLOCKED}i.com/is7Q.exe
  • http://{BLOCKED}alms.nl/iZiPVJm.exe
  • http://www.{BLOCKED}salapps.de/qCM8c0.exe
  • http://www.{BLOCKED}ecomposition.com/gh3GpN.exe
  • http://{BLOCKED}p.{BLOCKED}atch.com/xK1A2Hb.exe

It saves the files it downloads using the following names:

  • %User Temp%\{random numbers}.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.)

Other Details

This spyware connects to the following possibly malicious URL:

  • http://{BLOCKED}-neos.eu:8080/ponyb/gate.php
  • http://{BLOCKED}e.{BLOCKED}et.com:8080/ponyb/gate.php
  • http://{BLOCKED}list.{BLOCKED}et.com:8080/ponyb/gate.php
  • http://{BLOCKED}ilonline.com:8080/ponyb/gate.php

It deletes itself after execution.

  SOLUTION

Minimum Scan Engine:

9.300

FIRST VSAPI PATTERN FILE:

9.722.03

FIRST VSAPI PATTERN DATE:

12 Feb 2013

VSAPI OPR PATTERN File:

9.723.00

VSAPI OPR PATTERN Date:

12 Feb 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

Identify and terminate files detected as TSPY_TEPFER.GP

[ Learn More ]
  1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

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 value}
  • In HKEY_CURRENT_USER\Software\WINRAR
    • Client Hash = {random value}
  • In HKEY_CURRENT_USER\Software\WINRAR
    • {random hex values} = {random hex values}

Step 4

Search and delete these files

[ 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 Temp%\{random numbers}.exe

Step 5

Scan your computer with your Trend Micro product to delete files detected as TSPY_TEPFER.GP. 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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