Trojan.Win32.VOOLS.AG
Trojan.Win32.Miner.vnpk (KASPERSKY)
Windows
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Trojan
Destructiveness: No
Encrypted: Yes
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.
It connects to certain websites to send and receive information. It deletes itself after execution.
TECHNICAL DETAILS
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 files:
- %Windows%\NetworkDistribution\svchost.exe <- detected as TROJ_EQUATED.LZCMT
- %Windows%\NetworkDistribution\spoolsv.exe <- detected as BKDR_EQUATED.LZCMU
- %System%\dllhostex.exe <- detected as Coinminer.Win32.MALXMR.SMBM4
(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)
It creates the following folders:
- NetworkDistribution
It adds the following mutexes to ensure that only one of its copies runs at any one time:
- {ED29R9-8ED1-C760-7D789N}
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\{String 1}{String 2}{String 3}\Parameters
ServiceDll = %System%\{String 1}{String 2}{String 3}.dll
Other System Modifications
This Trojan adds the following registry entries as part of its installation routine:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\NetworkPlatform\
Location Awareness
LastBackup = {Hex Values}
Information Theft
This Trojan gathers the following data:
- OS version
- Host Name
Other Details
This Trojan connects to the following website to send and receive information:
- http://185.{BLOCKED}24.101/install.php?os={OS Version}&host={Host Name}&{Installation Status=Install_Done or Error}/
It does the following:
- Drops the following component files that is used for the malware's EternalBlue/DoublePulsar Exploitation:
- %System%\{string1}{string2}{string3}.dll
- %System%\rdp{3 random characters}.{random file extension}
- %Windows%\NetworkDistribution\Diagnostics.txt
- %Windows%\NetworkDistribution\Eternalblue-2.2.0.fb
- %Windows%\NetworkDistribution\Eternalchampion-2.0.0.fb
- %Windows%\NetworkDistribution\_pytrch.pyd
- %Windows%\NetworkDistribution\adfw-2.dll
- %Windows%\NetworkDistribution\adfw.dll
- %Windows%\NetworkDistribution\cnli-0.dll
- %Windows%\NetworkDistribution\cnli-1.dll
- %Windows%\NetworkDistribution\coli-0.dll
- %Windows%\NetworkDistribution\crli-0.dll
- %Windows%\NetworkDistribution\dmgd-1.dll
- %Windows%\NetworkDistribution\dmgd-4.dll
- %Windows%\NetworkDistribution\esco-0.dll
- %Windows%\NetworkDistribution\etch-0.dll
- %Windows%\NetworkDistribution\etchCore-0.x64.dll
- %Windows%\NetworkDistribution\etchCore-0.x86.dll
- %Windows%\NetworkDistribution\eteb-2.dll
- %Windows%\NetworkDistribution\etebCore-2.x64.dll
- %Windows%\NetworkDistribution\etebCore-2.x86.dll
- %Windows%\NetworkDistribution\exma-1.dll
- %Windows%\NetworkDistribution\exma.dll
- %Windows%\NetworkDistribution\iconv.dll
- %Windows%\NetworkDistribution\libcurl.dll
- %Windows%\NetworkDistribution\libeay32.dll
- %Windows%\NetworkDistribution\libiconv-2.dll
- %Windows%\NetworkDistribution\libxml2.dll
- %Windows%\NetworkDistribution\out.dll
- %Windows%\NetworkDistribution\pcla-0.dll
- %Windows%\NetworkDistribution\pcre-0.dll
- %Windows%\NetworkDistribution\pcrecpp-0.dll
- %Windows%\NetworkDistribution\pcreposix-0.dll
- %Windows%\NetworkDistribution\posh-0.dll
- %Windows%\NetworkDistribution\posh.dll
- %Windows%\NetworkDistribution\pytrch.py
- %Windows%\NetworkDistribution\pytrch.pyc
- %Windows%\NetworkDistribution\riar-2.dll
- %Windows%\NetworkDistribution\riar.dll
- %Windows%\NetworkDistribution\spoolsv.xml
- %Windows%\NetworkDistribution\ssleay32.dll
- %Windows%\NetworkDistribution\svchost.xml
- %Windows%\NetworkDistribution\tibe-1.dll
- %Windows%\NetworkDistribution\tibe-2.dll
- %Windows%\NetworkDistribution\tibe.dll
- %Windows%\NetworkDistribution\trch-0.dll
- %Windows%\NetworkDistribution\trch-1.dll
- %Windows%\NetworkDistribution\trch.dll
- %Windows%\NetworkDistribution\trfo-0.dll
- %Windows%\NetworkDistribution\trfo-2.dll
- %Windows%\NetworkDistribution\trfo.dll
- %Windows%\NetworkDistribution\tucl-1.dll
- %Windows%\NetworkDistribution\tucl.dll
- %Windows%\NetworkDistribution\ucl.dll
- %Windows%\NetworkDistribution\x64.dll
- %Windows%\NetworkDistribution\x86.dll
- %Windows%\NetworkDistribution\xdvl-0.dll
- %Windows%\NetworkDistribution\zibe.dll
- %Windows%\NetworkDistribution\zlib1.dll
- It uses the following string lists that is used for the naming of the main service module DLL file:
- Windows
- Microsoft
- Network
- Remote
- Function
- Secure
- Application
- Update
- Time
- NetBIOS
- RPC
- Protocol
- SSDP
- UPnP
- Service
- Host
- Client
- Event
- Manager
- Helper
- System
(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)
It deletes itself after execution.
SOLUTION
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
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
Restart in Safe Mode
Step 4
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_LOCAL_MACHINE\SYSTEM\ControlSet001\services\{String 1}{String 2}{String 3}\Parameters
- ServiceDll = %System%\{String 1}{String 2}{String 3}.dll
- ServiceDll = %System%\{String 1}{String 2}{String 3}.dll
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\NetworkPlatform\Location Awareness
- LastBackup = {Hex Values}
- LastBackup = {Hex Values}
Step 5
Search and delete this file
- %Windows%\NetworkDistribution\svchost.exe <- detected as TROJ_EQUATED.LZCMT
- %Windows%\NetworkDistribution\spoolsv.exe <- detected as BKDR_EQUATED.LZCMU
- %System%\dllhostex.exe <- detected as Coinminer.Win32.MALXMR.SMBM4
- %System%\{string 1}{string 2}{string 3}.dll
- %System%\rdp{3 random characters}.{random file extension}
- %Windows%\NetworkDistribution\Diagnostics.txt
- %Windows%\NetworkDistribution\Eternalblue-2.2.0.fb
- %Windows%\NetworkDistribution\Eternalchampion-2.0.0.fb
- %Windows%\NetworkDistribution\_pytrch.pyd
- %Windows%\NetworkDistribution\adfw-2.dll
- %Windows%\NetworkDistribution\adfw.dll
- %Windows%\NetworkDistribution\cnli-0.dll
- %Windows%\NetworkDistribution\cnli-1.dll
- %Windows%\NetworkDistribution\coli-0.dll
- %Windows%\NetworkDistribution\crli-0.dll
- %Windows%\NetworkDistribution\dmgd-1.dll
- %Windows%\NetworkDistribution\dmgd-4.dll
- %Windows%\NetworkDistribution\esco-0.dll
- %Windows%\NetworkDistribution\etch-0.dll
- %Windows%\NetworkDistribution\etchCore-0.x64.dll
- %Windows%\NetworkDistribution\etchCore-0.x86.dll
- %Windows%\NetworkDistribution\eteb-2.dll
- %Windows%\NetworkDistribution\etebCore-2.x64.dll
- %Windows%\NetworkDistribution\etebCore-2.x86.dll
- %Windows%\NetworkDistribution\exma-1.dll
- %Windows%\NetworkDistribution\exma.dll
- %Windows%\NetworkDistribution\iconv.dll
- %Windows%\NetworkDistribution\libcurl.dll
- %Windows%\NetworkDistribution\libeay32.dll
- %Windows%\NetworkDistribution\libiconv-2.dll
- %Windows%\NetworkDistribution\libxml2.dll
- %Windows%\NetworkDistribution\out.dll
- %Windows%\NetworkDistribution\pcla-0.dll
- %Windows%\NetworkDistribution\pcre-0.dll
- %Windows%\NetworkDistribution\pcrecpp-0.dll
- %Windows%\NetworkDistribution\pcreposix-0.dll
- %Windows%\NetworkDistribution\posh-0.dll
- %Windows%\NetworkDistribution\posh.dll
- %Windows%\NetworkDistribution\pytrch.py
- %Windows%\NetworkDistribution\pytrch.pyc
- %Windows%\NetworkDistribution\riar-2.dll
- %Windows%\NetworkDistribution\riar.dll
- %Windows%\NetworkDistribution\spoolsv.xml
- %Windows%\NetworkDistribution\ssleay32.dll
- %Windows%\NetworkDistribution\svchost.xml
- %Windows%\NetworkDistribution\tibe-1.dll
- %Windows%\NetworkDistribution\tibe-2.dll
- %Windows%\NetworkDistribution\tibe.dll
- %Windows%\NetworkDistribution\trch-0.dll
- %Windows%\NetworkDistribution\trch-1.dll
- %Windows%\NetworkDistribution\trch.dll
- %Windows%\NetworkDistribution\trfo-0.dll
- %Windows%\NetworkDistribution\trfo-2.dll
- %Windows%\NetworkDistribution\trfo.dll
- %Windows%\NetworkDistribution\tucl-1.dll
- %Windows%\NetworkDistribution\tucl.dll
- %Windows%\NetworkDistribution\ucl.dll
- %Windows%\NetworkDistribution\x64.dll
- %Windows%\NetworkDistribution\x86.dll
- %Windows%\NetworkDistribution\xdvl-0.dll
- %Windows%\NetworkDistribution\zibe.dll
- %Windows%\NetworkDistribution\zlib1.dll
Step 6
Search and delete these folders
- NetworkDistribution
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as Trojan.Win32.VOOLS.AG. 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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