TSPY_BANKER.YYS

June 19, 2015
 Analysis by: Rika Joi Gregorio
 PLATFORM:

Windows

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

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Dropped by other malware

This spyware may be dropped by other malware.

  TECHNICAL DETAILS

File Size:

11,534,336 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

16 Jun 2015

Payload:

Connects to URLs/IPs, Displays message/message boxes

Arrival Details

This spyware may be dropped by other malware.

Installation

This spyware drops the following files:

  • %Application Data%\botpc.cdr
  • %User Temp%\jackp.txt

(Note: %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

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 MediaCenter =
MediaCenter = %Application Data%\dreamx.exe

Information Theft

This spyware gathers the following data:

  • Host name
  • OS version
  • Default browser
  • Installed plugin
  • Installed anti-virus

Stolen Information

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

  • http://{BLOCKED}adistancia.esy.es/point.php

NOTES:

This spyware adds its autostart registry using its original file name, %Application Data%\dreamx.exe.

It also logs keystrokes to monitor credit card transactions from the following banks:

  • Caixa
  • Citibank
  • HSBC
  • HSBC Premier
  • HSBC Advance
  • Itau
  • Santander
  • Sicredi

It displays a message box and terminates itself once the following conditions are met:

  • If it is found running in the following:
    • VMWare
    • Virtual PC
    • Virtual Box
  • If the file ntdll.dll exports the following functions:
    • wine_get_version
    • wine_nt_to_unix_file_name
  • If the library VBoxHook.dll is loaded
  • If the device VBoxMiniRdrDn exists

  SOLUTION

Minimum Scan Engine:

9.750

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

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Restart in Safe Mode

[ Learn More ]

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\Microsoft\Windows\CurrentVersion\Run
    • MediaCenter = "%Application Data%\dreamx.exe"

Step 5

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.
  • %Application Data%\botpc.cdr
  • %User Temp%\jackp.txt

Step 6

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_BANKER.YYS . 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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