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TSPY_GROZLEX.B

January 05, 2016
 Analysis by: Don Ovid Ladores
 THREAT SUBTYPE:

Information Stealer

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Dropped by other malware


This Trojan steals certain information from the system and/or the user.

  TECHNICAL DETAILS

File Size:

228,352 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

16 May 2014

Payload:

Connects to URLs/IPs

Installation

This Trojan drops the following copies of itself into the affected system:

  • %temp%\{dropped/executed filename}.exe

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

HKEY_Current_User\Microsoft\Windows\
CurrentVersion
"M File" = {dropped copy of the malware in %temp% folder}

HKEY_Current_User\Microsoft\Windows\
CurrentVersion\Run
"MS Sound Drivers" = {dropped copy of the malware in %temp% folder}

HKEY_Current_User\Microsoft\Windows\
CurrentVersion\Run
"0" = {dropped copy of the malware in %temp% folder}

Information Theft

This Trojan steals the following information:

  • Vitalwerks username and Password
  • Pidgin protocol and accounts
  • Microsoft Office Product Key
  • Yahoo Messenger saved IDs and Passwords
  • Mozilla Firefox saved Credentials
  • Google Chrome saved Credentials
  • Opera Browser saved Credentials
  • WindowsLive Credentials
  • PalTalk Credentials
  • Browser Cookies
  • Filezilla Credentials
  • Steam Credentials
  • MSN Chat Logs
  • Yahoo Chat Logs
  • Skype Chat Logs
  • Digsby Logs

Stolen Information

This Trojan sends the gathered information via HTTP POST to the following URL:

  • {BLOCKED}ix.{BLOCKED}ista.org/index.php

NOTES:

Depending on its build, variants may also use FTP and email to send the stolen information.

It also has the capability to download other binaries for execution into the path %AllUsersProfile%\Templates\{file name.exe}. The variable {file name.exe} is the default name but may change depending on the build of the malware. It also displays pop-up message boxes depending on its configuration.

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

10.798.02

FIRST VSAPI PATTERN DATE:

16 May 2014

VSAPI OPR PATTERN File:

10.799.00

VSAPI OPR PATTERN Date:

17 May 2014

Step 1

Scan your computer with your Trend Micro product to delete files detected as TSPY_GROZLEX.B. 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.

Step 2

Search and delete this file

[ 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. DATA_GENERIC
  • In the Look In drop-down list, select My Computer then press Enter.
  • Once located, select the file then press SHIFT+DELETE to delete it.
    *Note: The file name input box title varies depending on the Windows version (e.g. Search for files or folders named or All or part of the file name.).

    • • For Windows Vista, Windows 7, Windows Server 2008, Windows 8, Windows 8.1, and Windows Server 2012:

    1. Open a Windows Explorer window.
      • For Windows Vista, 7, and Server 2008 users, click Start>Computer.
      • For Windows 8, 8.1, and Server 2012 users, right-click on the lower left corner of the screen, then click File Explorer.
    2. In the Search Computer/This PC input box, type:
      DATA_GENERIC
    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 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.


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