arrow_back
search
close

TROJ_NODEF.CQ

October 08, 2012
 Analysis by: Roland Marco Dela Paz
 PLATFORM:

Windows 2000, XP, Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

This Trojan may be dropped by other malware.

  TECHNICAL DETAILS

File Size:

25,088 bytes

File Type:

PE

Memory Resident:

No

Initial Samples Received Date:

26 Jan 2011

Arrival Details

This Trojan may be dropped by other malware.

Installation

This Trojan drops and executes the following files:

  • %User Temp%\explorer.exe - non-malicious file

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)

Other Details

This Trojan does the following:

  • It queries if the following registry is present on the affected system:
  • HKEY_LOCAL_MACHINE\SOFTWARE\360Safe\safemon
  • If so, it adds the following entries under the said key:
  • IEProtAccess = 0
  • IEProtNotify = 0
  • It also executes the legitimate file %Windows%\explorer.exe upon execution.

(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.)

  SOLUTION

Minimum Scan Engine:

8.900

VSAPI PATTERN File:

07.794.05

VSAPI PATTERN Date:

26 Jan 2011

VSAPI PATTERN Date:

1/26/2011 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

Search and delete this file

[ Learn More ]
There may be some component files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden files and folders in the search result.  %User Temp%\explorer.exe

Step 3

Delete this registry key

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_LOCAL_MACHINE\SOFTWARE\
    • 360Safe

Step 4

Scan your computer with your Trend Micro product to delete files detected as TROJ_NODEF.CQ. 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.


Did this description help? Tell us how we did.