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TSPY_BANKER.YZV
Aliases: Win32/TrojanDownloader.Banload.SYC (Eset), Gen:Variant.Strictor.51541 (F-Secure), HEUR:Trojan.Win32.Generic (Kaspersky), Troj/DwnLdr-LJO (Sophos)
Malware type: Spyware
Destructive: No
Platform: Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
Encrypted: No
In the wild: Yes

Overview


Infection Channel: Dropped by other malware, Downloaded from the Internet

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 may be downloaded from remote sites by other malware.

It retrieves specific information from the affected system.

Technical Details


File size: 4,668,928 bytes
File type: EXE
Memory resident: Yes
Initial samples received date: 21 Feb 2014
Payload: Connects to URLs/IPs

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.

It may be downloaded from remote site(s) by the following malware:

  • TROJ_BANLOAD.YZV

It may be downloaded from the following remote sites:

  • http://{BLOCKED}.{BLOCKED}.44.136/Telefones.&.Celulares/Smartphones/iPhone-5S-Apple&16GB&com&Tela-4-iOS-7-Touch&ID&Camera-8MP&Wi-Fi&3G-4G-GPS-MP3&e&Bluetooth-Dourado.aspx=36/chamana18.asp

Installation

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

  • %User Profile%\Local Settings\Application Data\HuAnYcA.exe

(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

It drops the following non-malicious files:

  • %User Profile%\Local Settings\Application Data\HuAnYcA.txt
  • %User Profile%\Local Settings\Application Data\windataup.inf - date of execution was stored

(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

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
HuAnYcA = "%User Profile%\Local Settings\Application Data\HuAnYcA.exe"

Information Theft

This spyware retrieves the following information from the affected system:

  • Username
  • Password

Stolen Information

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

  • http://www.{BLOCKED}rhost.com.br/chamana/amigos/index.php?id=1

Solution


Minimum scan engine: 9.700
First VSAPI Pattern File: 10.628.03
First VSAPI Pattern Release Date: 25 Feb 2014
VSAPI OPR Pattern Version: 10.629.00
VSAPI OPR Pattern Release Date: 26 Feb 2014

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

Remove the malware/grayware file that dropped/downloaded TSPY_BANKER.YZV

Step 3

Identify and terminate files detected as TSPY_BANKER.YZV

[ Learn more ]
  1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. 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.
  3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

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
    • HuAnYcA = "%User Profile%\Local Settings\Application Data\HuAnYcA.exe"

Step 5

Search and delete these files

[ Learn more ]
There may be some component 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 Profile%\Local Settings\Application Data\HuAnYcA.txt
%User Profile%\Local Settings\Application Data\windataup.inf

Step 6

Scan your computer with your Trend Micro product to delete files detected as TSPY_BANKER.YZV. 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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Analysis By: Rhena Inocencio

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