Trojan.Win32.NEUREVT.D


 ALIASES:

RDN/Generic.dx (McAfee)

 PLATFORM:

Windows

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

  • 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:

795,648 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

07 Feb 2020

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 adds the following processes:

  • %Windows%\SysWOW64\explorer.exe
  • %User Temp%\q713qcckcy77_1.exe /suac
  • %System%\svchost.exe -k LocalServiceAndNoImpersonation
  • %Windows%\Microsoft.NET\Framework\v4.0.30319\mscorsvw.exe
  • %Windows%\Microsoft.NET\Framework64\v4.0.30319\mscorsvw.exe
  • %System%\sppsvc.exe
  • "%System Root%\Program Files\Windows Media Player\wmpnetwk.exe"
  • %System%\svchost.exe -k WerSvcGroup
  • %System%\DllHost.exe /Processid:{F9717507-6651-4EDB-BFF7-AE615179BCCF}
  • %System%\WerFault.exe -u -p 3360 -s 1236
  • %System%\WerFault.exe -u -p 3724 -s 208
  • %System%\WerFault.exe -u -p 3116 -s 200
  • %System%\WerFault.exe -u -p 3116 -s 212
  • %System%\WerFault.exe -u -p 3116 -s 196
  • %System%\WerFault.exe -u -p 3548 -s 1232
  • %System%\WerFault.exe -u -p 3484 -s 196
  • %System%\WerFault.exe -u -p 3484 -s 212
  • %System%\WerFault.exe -u -p 3484 -s 200
  • %System%\WerFault.exe -u -p 3676 -s 184
  • %System%\WerFault.exe -u -p 3676 -s 200
  • %System%\WerFault.exe -u -p 3676 -s 188
  • %System%\WerFault.exe -u -p 1972 -s 208
  • %System%\WerFault.exe -u -p 1972 -s 200
  • %System%\WerFault.exe -u -p 1972 -s 204
  • %System Root%\easdfghjkljhgfdfghjkuaydd7ua7eqjhhd\setdll.com
  • "%System Root%\easdfghjkljhgfdfghjkuaydd7ua7eqjhhd\setdll.com"
  • "%System%\WScript.exe" "%System Root%\eSupport\update.vbs"
  • %System Root%\eSupport\update.vbs
  • "%System Root%\eSupport\google.bat"
  • google.bat
  • timeout 3
  • "lsassc.exe" e -pControl win.rar
  • timeout 5
  • lmxs.vbs
  • "%System%\WScript.exe" "%System Root%\eSupport\lmxs.vbs"
  • %System Root%\eSupport\lmxs.vbs
  • timeout 4
  • "%System Root%\eSupport\java.bat"
  • %System Root%\eSupport\java.bat
  • attrib +s +h "%System Root%\eSupport"
  • netsh advfirewall set allprofiles state off
  • taskkill /f /im miniperl.exe
  • taskkill /f /im httpd.exe

It creates the following folders:

  • %System Root%\easdfghjkljhgfdfghjkuaydd7ua7eqjhhd
  • %All Users Profile%\Google Updater 2.08
  • %Windows%\ServiceProfiles\NetworkService\AppData\Local\Microsoft
  • %System Root%\eSupport

(Note: %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.. %All Users Profile% is the common user's profile folder, which is usually C:\Documents and Settings\All Users on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit). . %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)

Other System Modifications

This Trojan deletes the following files:

  • %AppDataLocal%\Microsoft\Internet Explorer\VersionManager\versionlist.xml
  • %All Users Profile%\Google Updater 2.08\desktop.ini
  • %All Users Profile%\Google Updater 2.08\q713qcckcy77.exe:Zone.Identifier

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

It adds the following registry entries:

HKEY_CURRENT_USER\Software\AppDataLow\
Google Updater
LastUpdate = "\x81\xf5l\x9d\xcb\x1f\x041\xa3\xd6\xdb}\xa5k\x94\xe7"

HKEY_CURRENT_USER\Software\AppDataLow\
Software\{9DE97081-D703-182D-BFCA-C761B97788FB}\14E41F9D\
69fe0967be71
8a3c2aaaa4124b6501 = "\x12\x00\x08\x00\x00\x00\xe3\x07\x08\x00\x00\x00\xe3\x07"

HKEY_CURRENT_USER\Software\AppDataLow\
Software\{9DE97081-D703-182D-BFCA-C761B97788FB}\14E41F9D\
69fe0967be71
28673a9bbbdf0c02d0 = "\x00\x00\x00\x00"

HKEY_CURRENT_USER\Software\AppDataLow\
Software\{9DE97081-D703-182D-BFCA-C761B97788FB}\14E41F9D\
69fe0967be71
8be3f0e7d74004615b7 = "\x00\x00\x00\x00"

HKEY_CURRENT_USER\Software\AppDataLow\
Software\{9DE97081-D703-182D-BFCA-C761B97788FB}\14E41F9D\
69fe0967be71
3d47512c69447f = "\x00\x00\x00\x00"

HKEY_CURRENT_USER\Software\AppDataLow\
Software\{9DE97081-D703-182D-BFCA-C761B97788FB}\14E41F9D\
69fe0967be71
9faf4d1fefa1c6652e7 = "\x00\x00\x00\x00"

HKEY_CURRENT_USER\Software\AppDataLow\
Software\{9DE97081-D703-182D-BFCA-C761B97788FB}\14E41F9D\
69fe0967be71
5dd97d98f6cd89f5cb = "\x00\x00\x00\x00"

HKEY_CURRENT_USER\Software\AppDataLow\
Software\{9DE97081-D703-182D-BFCA-C761B97788FB}\14E41F9D\
69fe0967be71
0293ccb04bd = "\x00\x00\x00\x00"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile
EnableFirewall = "0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\SharedAccess\Parameters\
FirewallPolicy\PublicProfile
EnableFirewall = "0"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\MpsSvc
Start = "4"

HKEY_CURRENT_USER\Software\AppDataLow\
Software\{9DE97081-D703-182D-BFCA-C761B97788FB}\14E41F9D\
69fe0967be71
aaa3ad870cfc8ee = "\x01\x00\x00\x00"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution Options\
mbamgui.exe
Debugger = "woxc.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution Options\
mbam.exe
Debugger = "tqke.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution Options\
Mrtstub.exe
Debugger = "ikve.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution Options\
MRT.exe
Debugger = "nvyk.exe"

HKEY_CURRENT_USER\Software\AppDataLow\
Software\{9DE97081-D703-182D-BFCA-C761B97788FB}\14E41F9D\
69fe0967be71
498220109e5d3e5 = "\x05\xee\x00\x00"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution Options\
winmgr108.exe
Debugger = "wnfggmiue.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution Options\
rstrui.exe
Debugger = "qvskgykms.exe"

It modifies the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\SSDPSRV
Start = "2"

(Note: The default value data of the said registry entry is 3.)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\wuauserv
Start = "4"

(Note: The default value data of the said registry entry is 2.)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\wscsvc
Start = "4"

(Note: The default value data of the said registry entry is 2.)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\BITS
Start = "4"

(Note: The default value data of the said registry entry is 3.)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\SharedAccess
Start = "4"

(Note: The default value data of the said registry entry is 2.)

It deletes the following registry keys:

HKEY_CURRENT_USER\Software\AppDataLow\
Software\{9DE97081-D703-182D-BFCA-C761B97788FB}\14E41F9D\
69fe0967be71\119cc477f2e0c532

Dropping Routine

This Trojan drops the following files:

  • %System Root%\eSupport\winme.dll
  • %System Root%\eSupport\siteopen.js
  • %System Root%\eSupport\win.rar
  • %All Users Profile%\Microsoft\Windows\DRM\drmstore.hds
  • %AppDataLocal%\Microsoft\Media Player\CurrentDatabase_372.wmdb
  • %All Users Profile%\Google Updater 2.08\hahgjhzoy.txt
  • %System Root%\easdfghjkljhgfdfghjkuaydd7ua7eqjhhd\setdll.com
  • %All Users Profile%\Microsoft\Windows\DRM\v3ks.sec
  • %System Root%\eSupport\run.vbs
  • %All Users Profile%\Google Updater 2.08\q713qcckcy77.exe
  • %System Root%\eSupport\java.bat
  • %System Root%\eSupport\lsassc.exe
  • %System Root%\eSupport\google.bat
  • %System Root%\eSupport\update.vbs
  • %System Root%\eSupport\lmxs.vbs
  • %User Temp%\q713qcckcy77_1.exe

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 Trojan.Win32.NEUREVT.D

[ 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

Delete this registry value

[ Learn More ]

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\AppDataLow\Google Updater
    • LastUpdate = "\x81\xf5l\x9d\xcb\x1f\x041\xa3\xd6\xdb}\xa5k\x94\xe7"
  • In HKEY_CURRENT_USER\Software\AppDataLow\Software\{9DE97081-D703-182D-BFCA-C761B97788FB}\14E41F9D\69fe0967be71
    • 8a3c2aaaa4124b6501 = "\x12\x00\x08\x00\x00\x00\xe3\x07\x08\x00\x00\x00\xe3\x07"
  • In HKEY_CURRENT_USER\Software\AppDataLow\Software\{9DE97081-D703-182D-BFCA-C761B97788FB}\14E41F9D\69fe0967be71
    • 28673a9bbbdf0c02d0 = "\x00\x00\x00\x00"
  • In HKEY_CURRENT_USER\Software\AppDataLow\Software\{9DE97081-D703-182D-BFCA-C761B97788FB}\14E41F9D\69fe0967be71
    • 8be3f0e7d74004615b7 = "\x00\x00\x00\x00"
  • In HKEY_CURRENT_USER\Software\AppDataLow\Software\{9DE97081-D703-182D-BFCA-C761B97788FB}\14E41F9D\69fe0967be71
    • 3d47512c69447f = "\x00\x00\x00\x00"
  • In HKEY_CURRENT_USER\Software\AppDataLow\Software\{9DE97081-D703-182D-BFCA-C761B97788FB}\14E41F9D\69fe0967be71
    • 9faf4d1fefa1c6652e7 = "\x00\x00\x00\x00"
  • In HKEY_CURRENT_USER\Software\AppDataLow\Software\{9DE97081-D703-182D-BFCA-C761B97788FB}\14E41F9D\69fe0967be71
    • 5dd97d98f6cd89f5cb = "\x00\x00\x00\x00"
  • In HKEY_CURRENT_USER\Software\AppDataLow\Software\{9DE97081-D703-182D-BFCA-C761B97788FB}\14E41F9D\69fe0967be71
    • 0293ccb04bd = "\x00\x00\x00\x00"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile
    • EnableFirewall = "0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\PublicProfile
    • EnableFirewall = "0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\MpsSvc
    • Start = "4"
  • In HKEY_CURRENT_USER\Software\AppDataLow\Software\{9DE97081-D703-182D-BFCA-C761B97788FB}\14E41F9D\69fe0967be71
    • aaa3ad870cfc8ee = "\x01\x00\x00\x00"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\mbamgui.exe
    • Debugger = "woxc.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\mbam.exe
    • Debugger = "tqke.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Mrtstub.exe
    • Debugger = "ikve.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\MRT.exe
    • Debugger = "nvyk.exe"
  • In HKEY_CURRENT_USER\Software\AppDataLow\Software\{9DE97081-D703-182D-BFCA-C761B97788FB}\14E41F9D\69fe0967be71
    • 498220109e5d3e5 = "\x05\xee\x00\x00"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\winmgr108.exe
    • Debugger = "wnfggmiue.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\rstrui.exe
    • Debugger = "qvskgykms.exe"

Step 4

Restore these modified registry values

[ Learn More ]

Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.

  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\SSDPSRV
    • From: Start = "2"
      To: Start = ""3""
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\wuauserv
    • From: Start = "4"
      To: Start = ""2""
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\wscsvc
    • From: Start = "4"
      To: Start = ""2""
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\BITS
    • From: Start = "4"
      To: Start = ""3""
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\SharedAccess
    • From: Start = "4"
      To: Start = ""2""

Step 5

Search and delete these components

[ Learn More ]
There may be some components 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.
  • %System Root%\eSupport\winme.dll
  • %System Root%\eSupport\siteopen.js
  • %System Root%\eSupport\win.rar
  • %All Users Profile%\Microsoft\Windows\DRM\drmstore.hds
  • %AppDataLocal%\Microsoft\Media Player\CurrentDatabase_372.wmdb
  • %All Users Profile%\Google Updater 2.08\hahgjhzoy.txt
  • %System Root%\easdfghjkljhgfdfghjkuaydd7ua7eqjhhd\setdll.com
  • %All Users Profile%\Microsoft\Windows\DRM\v3ks.sec
  • %System Root%\eSupport\run.vbs
  • %All Users Profile%\Google Updater 2.08\q713qcckcy77.exe
  • %System Root%\eSupport\java.bat
  • %System Root%\eSupport\lsassc.exe
  • %System Root%\eSupport\google.bat
  • %System Root%\eSupport\update.vbs
  • %System Root%\eSupport\lmxs.vbs
  • %User Temp%\q713qcckcy77_1.exe

Step 6

Search and delete these folders

[ 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.
  • %System Root%\easdfghjkljhgfdfghjkuaydd7ua7eqjhhd
  • %All Users Profile%\Google Updater 2.08
  • %Windows%\ServiceProfiles\NetworkService\AppData\Local\Microsoft
  • %System Root%\eSupport

Step 7

Scan your computer with your Trend Micro product to delete files detected as Trojan.Win32.NEUREVT.D. 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:

Step 8

Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.

  • %AppDataLocal%\Microsoft\Internet Explorer\VersionManager\versionlist.xml
  • %All Users Profile%\Google Updater 2.08\desktop.ini
  • %All Users Profile%\Google Updater 2.08\q713qcckcy77.exe:Zone.Identifier

Step 9

Restore these deleted registry keys/values from backup

*Note: Only Microsoft-related keys/values will be restored. If the malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.

  • In HKEY_CURRENT_USER\Software\AppDataLow\Software\{9DE97081-D703-182D-BFCA-C761B97788FB}\14E41F9D\69fe0967be71
    • 119cc477f2e0c532


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