Analysis by: Alvin Bacani
 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

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

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: 34,816 bytes
Memory Resident: Yes
Initial Samples Received Date: 11 Nov 2013
Payload: Downloads files

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.

Download Routine

This Trojan connects to the following website(s) to download and execute a malicious file:

  • http://{BLOCKED}dies.com/templates/themza_j25_13/images/green/logo.exe
  • http://{BLOCKED}ess.com/wp-content/uploads/2013/04/ourgoals.exe
  • http://{BLOCKED}q.com/wp-content/uploads/2013/08/saniteq-jet-hand-dryer-thumb-1.exe
  • http://{BLOCKED}onthe.com/images/slide1.exe
  • http://{BLOCKED}manbook.com/wp-content/uploads/2012/07/Joeys-Story-200x300.exe

It saves the files it downloads using the following names:

  • %Application Data%\{random filename}.exe - detected as TSPY_ZBOT.OTN

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

  SOLUTION

Minimum Scan Engine: 9.300
FIRST VSAPI PATTERN FILE: 10.404.08
FIRST VSAPI PATTERN DATE: 07 Nov 2013
VSAPI OPR PATTERN File: 10.405.00
VSAPI OPR PATTERN Date: 07 Nov 2013

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 TROJ_DLOADR.AKS

     
    • TSPY_ZBOT.OTN

Step 3

Search and delete these files

[ 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.
  • %Application Data%\{random filename}.exe

Step 4

Scan your computer with your Trend Micro product to delete files detected as TROJ_DLOADR.AKS. 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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