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Coinminer.Win64.MALXMR.TIAOODCV

January 21, 2020
 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: Coinminer

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Coinminer 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:

43,520 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

21 Jan 2020

Arrival Details

This Coinminer 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 Coinminer adds the following processes:

  • reg delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Command Processor" /v "AutoRun" /f.
  • sc stop clr_optimization_v4.0.30328_64
  • sc delete clr_optimization_v4.0.30328_64
  • sc stop PrApp
  • sc delete PrApp
  • sc stop TrustedInstaller
  • sc delete TrustedInstaller
  • sc stop MicrosoftMsql
  • sc delete MicrosoftMsql
  • sc stop Workstation
  • sc delete Workstation
  • sc stop csrss
  • sc delete csrss
  • sc stop RegSvc
  • sc delete RegSvc
  • taskkill /f /im csrss.exe
  • %System%\Wbem\WMIC.exe wmic process where "name='LDE.exe' and ExecutablePath='%System Root%\ProgramData\WinTcpAutoProxySvc\LDE.exe'" call Terminate
  • %System%\Wbem\WMIC.exe wmic process where "name='taskmgr.exe' and ExecutablePath='%System Root%\Windows\Temp\locales\taskmgr.exe'" call Terminate
  • sc stop WinTcpAutoProxySvc
  • sc delete WinTcpAutoProxySvc
  • sc stop WmSrv
  • sc delete WmSrv
  • %System%\Wbem\WMIC.exe wmic process where "name='myminer.exe' and ExecutablePath='%System Root%\Windows\temp\winstart\myminer.exe'" call Terminate
  • sc stop Servc
  • sc delete Servc
  • %System%\Wbem\WMIC.exe wmic process where "name='systems.exe' and ExecutablePath='%System Root%\Windows\debug\NAT\systems.exe'" call Terminate
  • %System%\Wbem\WMIC.exe wmic process where "name='TrustedInsteller.exe' and ExecutablePath='%System Root%\Program Files\Common Files\Services\TrustedInsteller.exe'" call Terminate
  • sc stop Microsoft.NET_Framework_NGEN
  • sc delete Microsoft.NET_Framework_NGEN
  • %System%\Wbem\WMIC.exe wmic process where "name='svchost.exe' and ExecutablePath='%System Root%\ProgramData\vmicvess\svchost.exe'" call Terminate
  • sc stop vmicvess
  • sc delete vmicvess
  • %System%\Wbem\WMIC.exe wmic process where "name='svchost.exe' and ExecutablePath='%System Root%\Windows\SysWOW64\inetsrv\102\svchost.exe'" call Terminate
  • %System%\Wbem\WMIC.exe wmic process where "name='systems.exe' and ExecutablePath='%System Root%\Windows\debug\nat\systems.exe'" call Terminate
  • sc stop smtpsvrch
  • sc delete smtpsvrch
  • sc stop smtpsvrZy
  • sc delete smtpsvrZy
  • taskkill /f /im flbrowser.exe
  • taskkill /f /im \xe2\x96\x93\xce\x93\xe2\x95\xa9\xe2\x95\x98\xe2\x95\x98\xe2\x94\x82\xe2\x95\x90\xc2\xb0\xe2\x94\xac\xcf\x84\xe2\x95\x9d\xce\xb1\xe2\x96\x93\xce\x93.exe
  • taskkill /f /im zy.exe
  • taskkill /f /im Clean.exe
  • sc stop sqlservice
  • sc delete sqlservice
  • sc stop taskmrg
  • sc delete taskmrg
  • %System%\Wbem\WMIC.exe wmic process where "name='service.exe' and ExecutablePath='%System Root%\Windows\data\service.exe'" call Terminate
  • %System%\Wbem\WMIC.exe wmic process where "name='dllhostex.exe' and ExecutablePath='%System Root%\windows\system32\dllhostex.exe'" call Terminate
  • %System%\Wbem\WMIC.exe wmic process where "name='xqwkhyc.exe' and ExecutablePath='%System Root%\Windows\hyc\xqwkhyc.exe'" call Terminate
  • sc stop nat
  • sc delete nat
  • %System%\Wbem\WMIC.exe wmic process where "name='explorer.exe' and ExecutablePath='%System Root%\windows\debug\nat\explorer.exe'" call Terminate
  • %System%\Wbem\WMIC.exe wmic process where "name='java.exe' and ExecutablePath='%System Root%\windows\java\java.exe'" call Terminate
  • taskkill /f /t /im sqlservr.exe
  • %System%\Wbem\WMIC.exe wmic process where "name='sqlservr.exe' and ExecutablePath='%System Root%\Windows\Fonts\sqlservr.exe'" call Terminate

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

It creates the following folders:

  • %Fonts%\sqlservr.exe

(Note: %Fonts% is the Windows Fonts folder, which is usually C:\Window\Fonts on Windows 2000(32-bit), XP, Server 2003(32-bit), Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.850

Step 1

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.

Step 2

Identify and terminate files detected as Coinminer.Win64.MALXMR.TIAOODCV

[ 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 3

Search and delete this folder

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
  • %Fonts%\sqlservr.exe

Step 4

Scan your computer with your Trend Micro product to delete files detected as Coinminer.Win64.MALXMR.TIAOODCV. 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 the following Trend Micro Support pages for more information:


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