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TSPY_BANCOS.YYJ

October 26, 2014
 PLATFORM:

Windows

 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.

  TECHNICAL DETAILS

File Size:

1,028,096 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

21 Oct 2014

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 creates the following folders:

  • %System Root%\config
  • %System Root%\config\ref
  • %User Temp%\temp_log
  • %User Temp%\temp_log\chat
  • %User Temp%\temp_log\tmp
  • %User Temp%\plugins
  • %User Temp%\pls
  • %User Temp%\goo
  • %User Temp%\uwpca20c4b6ec3856060d6c

(Note: %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.. %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.)

Other System Modifications

This spyware deletes the following files:

  • %System Root%\strings.txt
  • %System Root%\AUTOEXEC.BAT
  • %System Root%\config\tm.t
  • %System Root%\config\script.txt
  • %System Root%\config\update.txt
  • %System Root%\config\configure

(Note: %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.)

It deletes the following folders:

  • %User Temp%\Microsoft .NET Framework 4 Setup_4.0.30319
  • %User Temp%\Microsoft Visual C++ 2010 x86 Redistributable Setup_10.0.30319
  • %User Temp%\{835818DD-220C-4ABD-946E-0D8660B95E29}

(Note: %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.)

Dropping Routine

This spyware drops the following files:

  • %User Startup%\{malware file name}.lnk

(Note: %User Startup% is the current user's Startup folder, which is usually C:\Windows\Profiles\{user name}\Start Menu\Programs\Startup on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu\Programs\Startup on Windows NT, and C:\Documents and Settings\{User name}\Start Menu\Programs\Startup.)

Other Details

This spyware connects to the following possibly malicious URL:

  • http://{BLOCKED}esitetraffic.com/cache/forums/strings.txt
  • http://{BLOCKED}inemax.net/js/info/strings.txt
  • http://www.{BLOCKED}lm.com.ua/forum/files/.../strings.txt
  • http://www.{BLOCKED}e.com.br
  • http://www.{BLOCKED}o.com
  • http://www.{BLOCKED}n.com
  • http://www.{BLOCKED}a.com.br
  • http://www.{BLOCKED}ess.com
  • {BLOCKED}7.246.18
  • {BLOCKED}.88.247
  • {BLOCKED}.4.62
  • {BLOCKED}0.1
  • {BLOCKED}.228.223
  • {BLOCKED}.180.131
  • {BLOCKED}2.82.163
  • {BLOCKED}.197.203
  • {BLOCKED}169.244

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.700

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

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.
  • %User Startup%\{malware file name}.lnk

Step 3

Search and delete these folders

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
  • %System Root%\config
  • %System Root%\config\ref
  • %User Temp%\temp_log
  • %User Temp%\temp_log\chat
  • %User Temp%\temp_log\tmp
  • %User Temp%\plugins
  • %User Temp%\pls
  • %User Temp%\goo
  • %User Temp%\uwpca20c4b6ec3856060d6c

Step 4

Scan your computer with your Trend Micro product to delete files detected as TSPY_BANCOS.YYJ. 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 5

Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.

  • %System Root%\strings.txt
  • %System Root%\AUTOEXEC.BAT
  • %System Root%\config\tm.t
  • %System Root%\config\script.txt
  • %System Root%\config\update.txt
  • %System Root%\config\configure


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