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TROJ_SHELLDOWN.C

April 12, 2016
 ALIASES:

Win32.Trojan.WisdomEyes.151026.9950.9973 (Baidu)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

This Trojan does not have any propagation routine.

It does not have any backdoor routine.

It connects to certain websites to send and receive information. However, as of this writing, the said sites are inaccessible. It gathers information and reports it to its servers.

  TECHNICAL DETAILS

File Size:

73,728 bytes

Memory Resident:

No

Initial Samples Received Date:

22 Mar 2016

Installation

This Trojan drops the following copies of itself into the affected system and executes them:

  • %User Temp%\jucheck.exe

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

Propagation

This Trojan does not have any propagation routine.

Backdoor Routine

This Trojan does not have any backdoor routine.

Other Details

This Trojan connects to the following website to send and receive information:

  • https://{BLOCKED}d.jelastic.lunacloud.com/shownews.php?c={generated random value}&title={encrypted ‘computer name : login’}==&id={generated random numbers}

It does the following:

  • It connects to its C&C server to receive arbitrary codes and commands which it executes.
  • Upon execution, this malware opens the following non-malicious application:
    • Notepad.exe

However, as of this writing, the said sites are inaccessible.

It gathers the following information and reports it to its servers:

  • Computer Name

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

12.424.02

FIRST VSAPI PATTERN DATE:

24 Mar 2016

VSAPI OPR PATTERN File:

12.425.00

VSAPI OPR PATTERN Date:

25 Mar 2016

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

Scan your computer with your Trend Micro product and note files detected as TROJ_SHELLDOWN.C

Step 3

Identify and terminate files detected as TROJ_SHELLDOWN.C

[ Learn More ]
  1. 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 4

Scan your computer with your Trend Micro product to delete files detected as TROJ_SHELLDOWN.C. 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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