arrow_back
search
close

TROJ_COINMINE.WIOM

June 08, 2017
 Analysis by: Pearl Charlaine Espejo
 ALIASES:

Trojan.Win32.CoinMiner.epbsmz (NANO-Antivirus ); CoinMiner.JQE (AVG); Trojan/Win32.CoinMiner.C1951580 (AhnLab-V3); a variant of Win32/CoinMiner.AFR (ESET-NOD32)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

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.

  TECHNICAL DETAILS

File Size:

1,458,176 bytes

File Type:

EXE

Initial Samples Received Date:

18 May 2017

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 copies of itself into the affected system and executes them:

  • %Windows%\Fonts\wuauser.exe

(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)

It drops the following files:

  • %Windows%\Fonts\history.txt
  • %Windows%\Fonts\id.txt
  • %Windows%\Fonts\msiexev.exe
  • %Windows%\Temp\s320.1_.exe
  • %Windows%\Temp\s320._Miner_.log

(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)

Other Details

This Trojan connects to the following URL(s) to get the affected system's IP address:

  • icanhazip.com

It connects to the following possibly malicious URL:

  • 07.{BLOCKED}566.com
  • aa1.{BLOCKED}566.com

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

13.414.06

FIRST VSAPI PATTERN DATE:

18 May 2017

VSAPI OPR PATTERN File:

13.415.00

VSAPI OPR PATTERN Date:

19 May 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 TROJ_COINMINE.WIOM

[ 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

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.  
  • %Windows%\Fonts\history.txt
  • %Windows%\Fonts\id.txt
  • %Windows%\Fonts\msiexev.exe
  • %Windows%\Temp\s320.1_.exe
  • %Windows%\Temp\s320._Miner_.log

Step 5

Scan your computer with your Trend Micro product to delete files detected as TROJ_COINMINE.WIOM. 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.