Analysis by: Christopher Daniel So
ALIASES:

Virus:Win32/Bamital.E (Microsoft), Trojan.Bamital!inf (Symantec), W32/Bamital.a (McAfee), Trojan.Win32.Patched.kl (Kaspersky), Win32.Loader.Q (FSecure), Troj/Patched-O (Sophos), Virus.Win32.Bamital.c (Sunbelt), W32/Patched.KL!tr (Fortinet)

 PLATFORM:

Windows 2000, XP, Server 2003

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

  • Threat Type: File infector

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

This malware arrives as a file patched by TROJ_BAMITAL.SMH.

  TECHNICAL DETAILS

File Size: Varies
File Type: PE
Memory Resident: Yes
Initial Samples Received Date: 12 Nov 2010

NOTES:

Arrival Details

This malware arrives via the following means:

  • It is a file patched by TROJ_BAMITAL.SMH.

Other Details

Based on analysis of the codes, it has the following capabilities:

  • It loads a file named %System Root%\Documents and Settings\All Users\Documents\Server\hlp.dat and executes the file.

(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)

  SOLUTION

Minimum Scan Engine: 8.900
FIRST VSAPI PATTERN FILE: 7.616.10
FIRST VSAPI PATTERN DATE: 12 Nov 2010

Step 1

For Windows ME and XP 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 PE_PATCHED.SMC

[ Learn More ]
  1. For Windows 98 and ME users, Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. 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.
  3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 3

Scan your computer with your Trend Micro product to clean files detected as PE_PATCHED.SMC 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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