Analysis by: Roland Marco Dela Paz
ALIASES:

Microsoft : Trojan:Win32/Bamital; Norman : Trojan TXT/Bamital.A

 PLATFORM:

Windows 2000, XP, Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

It is used by its main component to monitor and modify Web search queries, which may lead to displaying of online advertisements.

This Trojan requires its main component to successfully perform its intended routine.

  TECHNICAL DETAILS

File Size: 35,676 bytes
File Type: Other
Memory Resident: No
Initial Samples Received Date: 13 Jan 2011

Installation

This Trojan is injected into the following processes running in memory:

  • iexplore.exe
  • firefox.exe
  • opera.exe
  • explorer.exe
  • chrome.exe

Other Details

This Trojan requires its main component to successfully perform its intended routine.

It does the following:

  • It is used by its main component to monitor and modify Web search queries, which may lead to displaying of online advertisements.

  SOLUTION

Minimum Scan Engine: 8.900
VSAPI PATTERN File: 07.766.03
VSAPI PATTERN Date: 13 Jan 2011
VSAPI PATTERN Date: 1/13/2011 12:00:00 AM

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

Scan your computer with your Trend Micro product and note files detected as TROJ_DROPPER.ESJ

Step 3

Restart in Safe Mode

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Step 4

Search and delete the file detected as TROJ_DROPPER.ESJ

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden files in the search result.


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