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TROJ_THEMLOAD.A

August 07, 2015
 ALIASES:

Trojan.Asprox.B (Symantec); Trojan.Win32.Generic!BT (Sunbelt); Trojan horse Generic13_c.AAIS (AVG)

 PLATFORM:

Windows

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

  • 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.

  TECHNICAL DETAILS

File Size:

1,227,776 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

07 Aug 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 creates the following folders:

  • %Program Files% (x64)
  • %Program Files% (x64)\Microsoft Silverlight
  • %Program Files% (x64)\Reference Assemblies
  • %Program Files% (x64)\Microsoft.NET
  • %Program Files% (x64)\Internet Explorer
  • %Program Files% (x64)\Windows Media Player

(Note: %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.)

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://campus.{BLOCKED}i.co.kr/pla/piez.exe

This report is generated via an automated analysis system.

  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

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.
  • %Program Files% (x64)
  • %Program Files% (x64)\Microsoft Silverlight
  • %Program Files% (x64)\Reference Assemblies
  • %Program Files% (x64)\Microsoft.NET
  • %Program Files% (x64)\Internet Explorer
  • %Program Files% (x64)\Windows Media Player

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_THEMLOAD.A. 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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