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TROJ_EMBED.NDB

February 28, 2013
 Analysis by: Nikko Tamana
 ALIASES:

Trojan-Spy.Win32.Zbot.jhjs (Kaspersky)

 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:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware


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 does not have any propagation routine.

It does not have any backdoor routine.

It does not have any downloading capability.

It does not have any information-stealing capability.

  TECHNICAL DETAILS

File Size:

348,160 bytes

File Type:

DOC

Memory Resident:

Yes

Initial Samples Received Date:

25 Feb 2013

Payload:

Drops files

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.

Propagation

This Trojan does not have any propagation routine.

Backdoor Routine

This Trojan does not have any backdoor routine.

Download Routine

This Trojan does not have any downloading capability.

Information Theft

This Trojan does not have any information-stealing capability.

NOTES:

TROJ_EMBED.NDB is a .DOC file that has an executable file embedded. When opened, there is a text in opened .DOC file that says:

  • “Double click the zip folder above to view order”

The embedded file named order has a .ZIP file icon but it is actually executable. This tricks users into executing the malicious file.

The user can also save the embedded file by dragging it outside of the opened .DOC file.

The embedded file order is detected as TSPY_ZBOT.NBD.

It does not have rootkit capabilities.

It does not exploit any vulnerability.

  SOLUTION

Minimum Scan Engine:

9.300

FIRST VSAPI PATTERN FILE:

9.754.02

FIRST VSAPI PATTERN DATE:

26 Feb 2013

VSAPI OPR PATTERN File:

9.755.00

VSAPI OPR PATTERN Date:

27 Feb 2013

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

Remove malware/grayware files dropped/downloaded by TROJ_EMBED.NDB

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_EMBED.NDB. 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.

NOTES:

Close the opened .DOC file before scanning with Trend Micro product.


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