Analysis by: Nice Yutuc

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 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.

It may be injected into processes running in memory.

  TECHNICAL DETAILS

File Size: 17,920 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 22 Mar 2012

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 may be injected into processes running in memory.

NOTES:

This Trojan attempts to connect to the following possibly malicious URL to download files:

  • http://{BLOCKED}unter.myfw.us

As a result, routines of the downloaded file may also be exhibited on the affected system.

  SOLUTION

Minimum Scan Engine: 9.200
VSAPI OPR PATTERN File: 8.855.00
VSAPI OPR PATTERN Date: 22 Mar 2012

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Identify and terminate files detected as TROJ_AGENT.BBSG

[ 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 3

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_AGENT.BBSG. 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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