Analysis by: Jaime Benigno Reyes
ALIASES:

Trojan-PSW.Win32.Tepfer.mfmb (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 on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It executes then deletes itself afterward.

  TECHNICAL DETAILS

File Size: 84,480 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 13 Jun 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 executes then deletes itself afterward.

Other System Modifications

This spyware adds the following registry entries:

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

HKEY_CURRENT_USER\Software\WinRAR
{random GUID} = "{random value}"

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

Download Routine

This spyware accesses the following websites to download files:

  • http://www.{BLOCKED}peraroma.it/Sb9A7JV1.exe
  • http://www.{BLOCKED}ly.net/E2KYVJD.exe
  • http://{BLOCKED}ntolivet.org/iUHgGvn.exe
  • http://{BLOCKED}ellabroker.com/pZYTn.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.)

Other Details

This spyware connects to the following possibly malicious URL:

  • http://{BLOCKED}m.{BLOCKED}s.com:8080/ponyb/gate.php
  • http://{BLOCKED}mmyonlineguide.com/ponyb/gate.php
  • http://{BLOCKED}ffiliatesolutions.co.uk/ponyb/gate.php
  • http://{BLOCKED}ritics.com/ponyb/gate.php