Analysis by: Christopher Daniel So
ALIASES:

Trojan:Win32/Bamital.J (Microsoft); W32/Bamital.dll (McAfee); Trojan.Win32.Small.cml (Kaspersky); W32/Bamital.FE trojan (Nod32)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Trend Micro detects the said file as BKDR_BAMITAL.WQ. As a result, routines of the said backdoor are also exhibited on the infected system.

This Trojan may be dropped by other malware.

It is used to load and execute a file.

  TECHNICAL DETAILS

File Size: 3,584 bytes
File Type: PE
Initial Samples Received Date: 12 Mar 2011
Payload: Executes another malware

Arrival Details

This Trojan may be dropped by other malware.

Other Details

This Trojan is used to load and execute the following file:

  • %System%\dll - detected as BKDR_BAMITAL.WQ

(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)

NOTES:
As a result, routines of the said backdoor are also exhibited on the infected system.

  SOLUTION

Minimum Scan Engine: 8.900
FIRST VSAPI PATTERN FILE: 7.894.02
FIRST VSAPI PATTERN DATE: 12 Mar 2011

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

Remove malware files dropped/downloaded by TROJ_BAMITAL.WQ

    • BKDR_BAMITAL.WQ

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_BAMITAL.WQ. 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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