TSPY_BANKER.EUIQ

October 09, 2012
 Analysis by: Roland Marco Dela Paz
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:
 INFORMATION EXPOSURE:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware

This Trojan may be downloaded by other malware/grayware/spyware from remote sites.

  TECHNICAL DETAILS

File Size:

306,598 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

26 Apr 2012

Payload:

Connects to URLs/IPs

Arrival Details

This Trojan may be downloaded by other malware/grayware/spyware from remote sites.

It may be downloaded from the following remote sites:

  • {BLOCKED}.{BLOCKED}.196.130

Autostart Technique

This Trojan enables its automatic execution at every system startup by dropping the following copies of itself into the Windows Common Startup folder:

  • gb_bf.exe

Other System Modifications

This Trojan adds the following registry entries as part of its installation routine:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings
GlobalUserOffline = "0"

Information Theft

This Trojan accesses the following site to download its configuration file:

  • http://{BLOCKED}.{BLOCKED}.196.130/bfs/update.dat

Its configuration file contains the following information:

  • Title strings of target banks
  • IP address or website address to where this spyware redirects the user

NOTES:

This spyware registers infection to its C&C server by issuing the following HTTP request:

http://{BLOCKED}.{BLOCKED}.228.178/painel/?add=1&inf=Browser Executando {Operating System}

It monitors the browser activities of the affected system, specifically the address bar or title bar. It redirects the browser to a phishing site whenever a user visits banking sites whose strings in the address/title bar matches the ones declared in this malware's configuration file.

Note that the content of the configuration file may vary. As of this writing, it contains the following bank-related strings and respective redirect IP addresses:

String: www.sicredi.com.br
Redirect site: http://{BLOCKED}.{BLOCKED}.243.130
String: Banco Ita - Feito Para Voc
Redirect site: http://{BLOCKED}.{BLOCKED}.243.131
String: Caixa Econ - mica Federal
Redirect site: http://{BLOCKED}.{BLOCKED}.243.132
String: Banco Santander Brasil | Pessoa Jur dica | Atendimento empresarial, empresas
Redirect site: http://{BLOCKED}.{BLOCKED}.243.133

  SOLUTION

Minimum Scan Engine:

9.200

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Identify and terminate files detected as TSPY_BANKER.EUIQ

[ Learn More ]
  1. 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.
  2. 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\Microsoft\Windows\CurrentVersion\Internet Settings
    • GlobalUserOffline = "0"

Step 4

Scan your computer with your Trend Micro product to delete files detected as TSPY_BANKER.EUIQ. 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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