TROJ_COINMINE.G

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.

As of this writing, the said sites are inaccessible.

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

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:

• D:\images.scr
• F:\images.scr
• %System Root%\images.scr

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

It drops the following files:

• %Application Data%\Images\image.exe
• %User Temp%\temp.txt
• %User Temp%\nst726A.tmp\inetc.dll
• %Application Data%\Images\NsCpuCNMiner32.exe
• %Application Data%\Images\NsCpuCNMiner64.exe
• %Application Data%\Images\NsGpuCNMiner.exe
• %Application Data%\Images\Data.bin
• %Application Data%\Images\pools.txt
• %Application Data%\Images\tmp.ini
• %Application Data%\Images\temp.txt
• %User Temp%\nst726A.tmp\System.dll

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It adds the following processes:

• %Application Data%\Images\image.exe SW_HIDE
• %Application Data%\Images\NsCpuCNMiner{System version}.exe" -dbg -1 -o stratum+tcp://mine.{BLOCKED}pool.com:3333 -u 44puJ9e27jyKc1et48J7SZLQ4pDcos96c6u84vcwHgCCce1TYqXxzpyR3gY793D9mKGEY7WjtC6TKA7eDbtvfrgGHoDNBGx -p x
• %Application Data%\Images\NsGpuCNMiner.exe" -dbg -1 -o stratum+tcp://mine.{BLOCKED}pool.com:3333 -u 44puJ9e27jyKc1et48J7SZLQ4pDcos96c6u84vcwHgCCce1TYqXxzpyR3gY793D9mKGEY7WjtC6TKA7eDbtvfrgGHoDNBGx -p x

It creates the following folders:

• %User Temp%

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Autostart Technique

This Trojan drops the following shortcut pointing to its copy in the User Startup folder to enable its automatic execution at every system startup:

• %User Startup%\image.lnk

(Note: %User Startup% is the current user's Startup folder, which is usually C:\Windows\Profiles\{user name}\Start Menu\Programs\Startup on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu\Programs\Startup on Windows NT, C:\Documents and Settings\{User name}\Start Menu\Programs\Startup on Windows 2003(32-bit), XP and 2000(32-bit), or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit), 10(64-bit).)

It modifies the following registry entries to ensure it automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
{Malware name} = %Application Data%\Images\image.exe

Download Routine

This Trojan connects to the following URL(s) to download its component file(s):

• http://{BLOCKED}ork.ru/test{Number}.txt

As of this writing, the said sites are inaccessible.

Information Theft

This Trojan accepts the following parameters:

• /S
• /NCRC
• /D={Directory}

Other Details

This Trojan does the following:

• It connects to the following mining pool:
  • stratum+tcp://mine.{BLOCKED}poo.com:3333

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