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TROJ_ROVNIX.NGT

November 19, 2014
 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • 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 may be downloaded from remote sites by other malware.

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

  TECHNICAL DETAILS

File Size:

364,544 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

08 Nov 2014

Payload:

Connects to URLs/IPs

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.

It may be downloaded from remote site(s) by the following malware:

It may be downloaded from the following remote sites:

  • http://{BLOCKED}.{BLOCKED}.31.9/work.exe

Installation

This Trojan drops the following files:

  • %User Temp%\L{volume ID}- log file containing the following information:
    • file path and name of the log file
    • system date and time
    • OS Version
    • OS Architecture (32-bit/64-bit)
    • number of drives
    • file system
    • volume ID
    • malware file path and name
    • malware file path
    • computername
    • username
    • parent process that runs the malware
    • PID of the process that runs the malware
  • %User Temp%\tmp{number}.tmp - log file containing the following information:
    • volume ID

(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.)

It adds the following processes:

  • iexplore.exe

It adds the following mutexes to ensure that only one of its copies runs at any one time:

  • Global\UAC{file system}{random}
  • Global\BD{file system}{random}
  • Global\INS{file system}{random}

It injects codes into the following process(es):

  • added iexplore.exe

Other System Modifications

This Trojan adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Installer\Products\B{volume ID}
LP = "%User Temp%\L{volume ID}"

Other Details

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

  • http://{BLOCKED}newbie.co.uk/cgi-bin/001/ldr.cgi

It does the following:

  • It may download and execute file from the server

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

NOTES:

This malware sends the content of the following files:

  • %User Temp%\tmp{number}.tmp
  • %User Temp%\L{volume ID}

  SOLUTION

Minimum Scan Engine:

9.700

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

Step 3

Scan your computer with your Trend Micro product and note files detected as TROJ_ROVNIX.NGT

Step 4

Restart in Safe Mode

[ Learn More ]

Step 5

Delete this registry value

[ 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_CURRENT_USER\Software\Microsoft\Installer\Products\B{{volume ID}
    • LP = "%User Temp%\L{volume ID}"

Step 6

Search and delete this file

[ 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.
  • %User Temp%\L{volume ID}
  • %User Temp%\tmp{number}.tmp

Step 7

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_ROVNIX.NGT. 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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