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TROJ_BANLOAD.YWNHQ

May 06, 2015
 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

  TECHNICAL DETAILS

File Size:

2,617,344 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

06 May 2015

Arrival Details

This Trojan 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 Trojan adds the following mutexes to ensure that only one of its copies runs at any one time:

  • jurandir

Download Routine

This Trojan accesses the following websites to download files:

  • http://www.{BLOCKED}rsitario.com/img/batman.zip

It saves the files it downloads using the following names:

  • %Application Data%\flashp.exe - detected as TSPY_BANKER.YWNHQ

(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.)

It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

  SOLUTION

Minimum Scan Engine:

9.750

FIRST VSAPI PATTERN FILE:

11.638.07

FIRST VSAPI PATTERN DATE:

29 Apr 2015

VSAPI OPR PATTERN File:

11.639.00

VSAPI OPR PATTERN Date:

30 Apr 2015

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 dropped/downloaded by TROJ_BANLOAD.YWNHQ. (Note: Please skip this step if the threat(s) listed below have already been removed.)

     TSPY_BANKER.YWNHQ

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_BANLOAD.YWNHQ. 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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