Analysis by: Byron Jon Gelera
ALIASES:

Trojan:Win32/Toga!rfn (Microsoft)

 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: Dropped by other malware, Downloaded from the Internet

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 executes commands from a remote malicious user, effectively compromising the affected system. It connects to a website to send and receive information. However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size: 65,536 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 02 Aug 2017
Payload: Connects to URLs/IPs, Steals information

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.

Installation

This Trojan drops the following component file(s):

  • {Current Malware Path}\svhelper.dll -> Also detected as BKDR_TOGA.T, loaded by the executable file to proceed with its routine

Propagation

This Trojan does not have any propagation routine.

Backdoor Routine

This Trojan executes the following commands from a remote malicious user:

  • Execute remote shell

It connects to the following websites to send and receive information:

  • www.{BLOCKED}orldischina.market:2147

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

Information Theft

This Trojan gathers the following data:

  • OS Version
  • Number of Processors
  • Processor Speed
  • Memory Size
  • Computer Name
  • Code Page

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 13.518.02
FIRST VSAPI PATTERN DATE: 07 Jul 2017
VSAPI OPR PATTERN File: 13.519.00
VSAPI OPR PATTERN Date: 08 Jul 2017

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

Identify and terminate files detected as BKDR_TOGA.T

[ 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 BKDR_TOGA.T. 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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