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TROJ_ZLOB.ABU

August 14, 2013
 Modified by: Rika Joi Gregorio
 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:

  • 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:

17,547,624 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

25 Aug 2011

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:

  • %User Temp%\ir_ext_temp_0
  • %User Temp%\ir_ext_temp_0\
  • %User Temp%\ir_ext_temp_0\AutoPlay
  • %User Temp%\ir_ext_temp_0\AutoPlay\Audio
  • %User Temp%\ir_ext_temp_0\AutoPlay\Buttons
  • %User Temp%\ir_ext_temp_0\AutoPlay\Docs
  • %User Temp%\ir_ext_temp_0\AutoPlay\Images
  • %User Temp%\ir_ext_temp_0\AutoPlay\Plugins
  • %User Temp%\ir_ext_temp_0\AutoPlay\Plugins\SHAPE
  • %User Temp%\ir_ext_temp_0\AutoPlay\Plugins\SLIDER
  • %User Temp%\_ir_tmpfnt_1

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

NOTES:

This Trojan displays a windows where it requires user interaction to click certain buttons consecutively to perform its intended routine.

  SOLUTION

Minimum Scan Engine:

9.300

FIRST VSAPI PATTERN FILE:

8.814.03

FIRST VSAPI PATTERN DATE:

03 Mar 2012

VSAPI OPR PATTERN File:

8.815.00

VSAPI OPR PATTERN Date:

04 Mar 2012

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

Scan your computer with your Trend Micro product and note files detected as TROJ_ZLOB.ABU

Step 3

Terminate the malware/grayware/spyware process:

[ Learn More ]
  1. 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.
  2. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 4

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.  
  • %User Temp%\ir_ext_temp_0
  • %User Temp%\_ir_tmpfnt_1

Step 5

Scan your computer with your Trend Micro product to delete files detected as TROJ_ZLOB.ABU . 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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