TROJ_COINMINE.G
Worm:Win32/NeksMiner!pz (MICROSOFT)
Windows
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
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.
As of this writing, the said sites are inaccessible.
However, as of this writing, the said sites are inaccessible.
TECHNICAL DETAILS
4,672,582 bytes
EXE
Yes
08 Feb 2024
Drops files, Creates files, Connects to URLs/IPs, Modifies system registry
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.
SOLUTION
9.800
19.146.02
08 Feb 2024
19.147.00
09 Feb 2024
Step 1
Trend Micro Predictive Machine Learning detects and blocks malware at the first sign of its existence, before it executes on your system. When enabled, your Trend Micro product detects this malware under the following machine learning name:
Step 2
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 3
Restart in Safe Mode
Step 4
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 5
Delete this registry value
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\Windows\CurrentVersion\Run
- {Malware name} = %Application Data%\Images\image.exe
- {Malware name} = %Application Data%\Images\image.exe
Step 6
Search and delete these files
- D:\images.scr
- F:\images.scr
- %System Root%\images.scr
- %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
- %User Startup%\image.lnk
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_COINMINE.G. 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.
Step 8
Scan your computer with your Trend Micro product to delete files detected as TROJ_COINMINE.G. 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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