TROJ_FAKEWHELP.B

October 26, 2015
 Analysis by: RonJay Kristoffer Caragay
 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Dropped by other malware

This Trojan may be dropped by other malware.

It does not have any propagation routine.

It does not have any backdoor routine.

It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system. As of this writing, the said sites are inaccessible.

It does not have any information-stealing capability.

  TECHNICAL DETAILS

File Size:

16,896 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

30 Sep 2015

Payload:

Connects to URLs/IPs, Downloads files

Arrival Details

This Trojan may be dropped by the following malware:

Propagation

This Trojan does not have any propagation routine.

Backdoor Routine

This Trojan does not have any backdoor routine.

Download Routine

This Trojan connects to the following website(s) to download and execute a malicious file:

  • https://trend.{BLOCKED}to.com/common/trend.html

It saves the files it downloads using the following names:

  • {malware path}\wscntfy.exe

It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

As of this writing, the said sites are inaccessible.

Information Theft

This Trojan does not have any information-stealing capability.

NOTES:

This Trojan installs authentication certificates to enable access to download sites .It checks if it is being debugged. It checks if Remote Debugger is present.

It checks open windows with the following class name:

  • 1212121
  • Eew75
  • icu_dbg
  • kk1
  • odbydyk
  • ollydbg
  • pe--diy
  • Shadow
  • TDeDeMainForm
  • TESTDBG
  • TIdaWindow
  • WinDbgFrameClass

It checks open windows with the following window name:

  • File Monitor - Sysinternals: www.sysinternals.com
  • Import REConstructor v1.6 FINAL (C) 2001-2003 MackT/uCF
  • PEiD v0.94
  • Registry Monitor - Sysinternals: www.sysinternals.com

It checks if its processes are any of the following:

  • ctfmon.exe
  • EXPLORER.EXE

If any of these are true, it terminates itself or results in an error.

  SOLUTION

Minimum Scan Engine:

9.750

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

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Remove the malware/grayware file that dropped/downloaded TROJ_FAKEWHELP.B. (Note: Please skip this step if the threat(s) listed below have already been removed.)

Step 4

Search and delete these files

[ Learn More ]
There may be some 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.
  • {malware path}\wscntfy.exe

Step 5

Scan your computer with your Trend Micro product to delete files detected as TROJ_FAKEWHELP.B. 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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