Author: Melvin Jhun Palbusa   
 

Win32:MalwareX-gen [Trj] (AVASt); Trojan:Win32/Qakbot.PM!MTB (MICROSOFT))

 PLATFORM:

Windows

 OVER ALL RISK RATING:
 DAMAGE POTENTIAL::
 DISTRIBUTION POTENTIAL::
 REPORTED INFECTION:
 INFORMATION EXPOSURE:
Low
Medium
High
Critical

  • Threat Type:
    Trojan Spy

  • Destructiveness:
    No

  • Encrypted:
    Yes

  • In the wild::
    Yes

  OVERVIEW

INFECTION CHANNEL: Descargado de Internet, Eliminado por otro tipo de malware

It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Ejecuta comandos desde un usuario remoto malicioso que pone en peligro el sistema afectado.

  TECHNICAL DETAILS

File size: 426,158 bytes
File type: DLL
Memory resident: Yes
INITIAL SAMPLES RECEIVED DATE: 14 февраля 2023
PAYLOAD: Connects to URLs/IPs, Collects system information, Drops files, Modifies system registry

Detalles de entrada

It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Instalación

Agrega los procesos siguientes:

  • Depending on the number of AV products that was found to be running in the system and the machine architecture it would choose from the following:
    • %system%\AtBroker.exe
    • %System%\wermgr.exe
    • %System%\msra.exe
    • %System%\backgroundTaskHost.exe
    • %Program Files%\Internet Explorer\iexplorer.exe
  • %System%\schtasks.exe /Create /RU "NT AUTHORITY\SYSTEM" /tn {Random} /tr "rundll32.exe \"{Malware Full Path and Name}.dll,Wind\"" /SC ONCE /Z /ST {Start Time} /ET {End Time}
  • whoami /all
  • cmd /c set
  • arp -a
  • ipconfig /all
  • net view /all
  • nslookup -querytype=ALL -timeout=10 _ldap._tcp.dc._msdcs.WORKGROUP
  • nltest /domain_trusts /all_trusts
  • net share
  • route print
  • netstat -nao
  • net localgroup
  • qwinsta

(Nota: %Program Files% es la carpeta Archivos de programa predeterminada, que suele estar en C:\Archivos de programa).

)

Agrega las siguientes exclusiones mutuas para garantizar que solo se ejecuta una de sus copias en todo momento:

  • Global\{GUID}

Este malware inyecta códigos en el/los siguiente(s) proceso(s):

  • Depending on the number of AV products that was found to be running in the system and the machine architecture it would choose from the following:
    • %Windows%\wermgr.exe
    • %System%\backgroundTaskHost.exe
    • %System%\msra.exe
    • %System%\AtBroker.exe
    • %Program Files%\Internet Explorer\iexplorer.exe

(Nota: %Program Files% es la carpeta Archivos de programa predeterminada, que suele estar en C:\Archivos de programa).

)

Técnica de inicio automático

Agrega las siguientes entradas de registro para permitir su ejecución automática cada vez que se inicia el sistema:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
{Random} = rundll32.exe {Malware Full Path and Name}.dll,Wind

Rutina de puerta trasera

Ejecuta los comandos siguientes desde un usuario remoto malicioso:

  • Update Self
  • Update Configuration
  • Download and Install Plugins
  • Terminate Processes
  • Drop Files
  • Drop Files and Run

Robo de información

Recopila los siguientes datos:

  • Computer Name
  • Username
  • IP address
  • Operating System Information
  • Processor Information
  • Installed Antivirus Products
  • Running Processes

Información sustraída

Este malware envía la información recopilada a la siguiente URL a través de HTTP POST:

  • {BLOCKED}.{BLOCKED}.186.195:443/t5
  • {BLOCKED}.{BLOCKED}.31.249:443/t5
  • {BLOCKED}.{BLOCKED}.112.14:50000/t5
  • {BLOCKED}.{BLOCKED}.176.218:443/t5
  • {BLOCKED}.{BLOCKED}.176.97:443/t5
  • {BLOCKED}.{BLOCKED}.45.81:2222/t5
  • {BLOCKED}.{BLOCKED}.204.71:443/t5
  • {BLOCKED}.{BLOCKED}.14.72:2222/t5
  • {BLOCKED}.{BLOCKED}.25.165:443/t5
  • {BLOCKED}.{BLOCKED}.236.149:443/t5
  • {BLOCKED}.{BLOCKED}.147.177:2222/t5
  • {BLOCKED}.{BLOCKED}.42.67:443/t5
  • {BLOCKED}.{BLOCKED}.72.139:2222/t5
  • {BLOCKED}.{BLOCKED}.101.164:50000/t5
  • {BLOCKED}.{BLOCKED}.24.154:443/t5
  • {BLOCKED}.{BLOCKED}.184.149:443/t5
  • {BLOCKED}.{BLOCKED}.110.133:443/t5
  • {BLOCKED}.{BLOCKED}.173.82:50001/t5
  • {BLOCKED}.{BLOCKED}.17.149:2222/t5
  • {BLOCKED}.{BLOCKED}.144.105:2222/t5
  • {BLOCKED}.{BLOCKED}.7.6:995/t5
  • {BLOCKED}.{BLOCKED}.204.82:2222/t5
  • {BLOCKED}.{BLOCKED}.156.14:2222/t5
  • {BLOCKED}.{BLOCKED}.53.166:443/t5
  • {BLOCKED}.{BLOCKED}.158.118:995/t5
  • {BLOCKED}.{BLOCKED}.69.229:2222/t5
  • {BLOCKED}.{BLOCKED}.216.238:443/t5
  • {BLOCKED}.{BLOCKED}.105.242:443/t5
  • {BLOCKED}.{BLOCKED}.112.40:61202/t5
  • {BLOCKED}.{BLOCKED}.206.65:995/t5
  • {BLOCKED}.{BLOCKED}.14.107:443/t5
  • {BLOCKED}.{BLOCKED}.154.19:443/t5
  • {BLOCKED}.{BLOCKED}.173.82:995/t5
  • {BLOCKED}.{BLOCKED}.204.2:2222/t5
  • {BLOCKED}.{BLOCKED}.51.138:995/t5
  • {BLOCKED}.{BLOCKED}.69.244:443/t5
  • {BLOCKED}.{BLOCKED}.119.20:443/t5
  • {BLOCKED}.{BLOCKED}.241.104:443/t5
  • {BLOCKED}.{BLOCKED}.196.114:443/t5
  • {BLOCKED}.{BLOCKED}.80.210:443/t5
  • {BLOCKED}.{BLOCKED}.204.71:993/t5
  • {BLOCKED}.{BLOCKED}.176.234:443/t5
  • {BLOCKED}.{BLOCKED}.173.82:20/t5
  • {BLOCKED}.{BLOCKED}.112.40:2078/t5
  • {BLOCKED}.{BLOCKED}.86.238:995/t5
  • {BLOCKED}.{BLOCKED}.200.140:443/t5
  • {BLOCKED}.{BLOCKED}.22.28:2222/t5
  • {BLOCKED}.{BLOCKED}.175.42:2222/t5
  • {BLOCKED}.{BLOCKED}.210.63:2222/t5
  • {BLOCKED}.{BLOCKED}.102.224:443/t5
  • {BLOCKED}.{BLOCKED}.173.82:465/t5
  • {BLOCKED}.{BLOCKED}.23.67:443/t5
  • {BLOCKED}.{BLOCKED}.30.133:443/t5
  • {BLOCKED}.{BLOCKED}.42.122:443/t5
  • {BLOCKED}.{BLOCKED}.72.56:443/t5
  • {BLOCKED}.{BLOCKED}.126.3:443/t5
  • {BLOCKED}.{BLOCKED}.120.191:443/t5
  • {BLOCKED}.{BLOCKED}.208.137:995/t5
  • {BLOCKED}.{BLOCKED}.41.77:2222/t5
  • {BLOCKED}.{BLOCKED}.48.205:443/t5
  • {BLOCKED}.{BLOCKED}.123.159:2222/t5
  • {BLOCKED}.{BLOCKED}.177.88:443/t5
  • {BLOCKED}.{BLOCKED}.138.217:2222/t5
  • {BLOCKED}.{BLOCKED}.173.82:32101/t5
  • {BLOCKED}.{BLOCKED}.216.98:2222/t5
  • {BLOCKED}.{BLOCKED}.117.95:2222/t5
  • {BLOCKED}.{BLOCKED}.173.82:2087/t5
  • {BLOCKED}.{BLOCKED}.252.153:995/t5
  • {BLOCKED}.{BLOCKED}.48.233:443/t5
  • {BLOCKED}.{BLOCKED}.26.14:995/t5
  • {BLOCKED}.{BLOCKED}.196.11:443/t5
  • {BLOCKED}.{BLOCKED}.173.82:990/t5
  • {BLOCKED}.{BLOCKED}.221.16:443/t5
  • {BLOCKED}.{BLOCKED}.214.138:2222/t5
  • {BLOCKED}.{BLOCKED}.132.174:2222/t5
  • {BLOCKED}.{BLOCKED}.100.207:995/t5
  • {BLOCKED}.{BLOCKED}.243.113:50000/t5
  • {BLOCKED}.{BLOCKED}.231.59:2222/t5
  • {BLOCKED}.{BLOCKED}.101.183:443/t5
  • {BLOCKED}.{BLOCKED}.202.22:443/t5
  • {BLOCKED}.{BLOCKED}.51.242:993/t5
  • {BLOCKED}.{BLOCKED}.191.120:2222/t5
  • {BLOCKED}.{BLOCKED}.12.217:2222/t5
  • {BLOCKED}.{BLOCKED}.204.71:995/t5
  • {BLOCKED}.{BLOCKED}.108.183:995/t5
  • {BLOCKED}.{BLOCKED}.98.62:995/t5
  • {BLOCKED}.{BLOCKED}.115.68:32100/t5
  • {BLOCKED}.{BLOCKED}.98.62:443/t5
  • {BLOCKED}.{BLOCKED}.163.165:443/t5
  • {BLOCKED}.{BLOCKED}.250.18:443/t5
  • {BLOCKED}.{BLOCKED}.180.14:995/t5
  • {BLOCKED}.{BLOCKED}.180.154:995/t5
  • {BLOCKED}.{BLOCKED}.240.16:995/t5
  • {BLOCKED}.{BLOCKED}.72.114:443/t5
  • {BLOCKED}.{BLOCKED}.77.115:443/t5
  • {BLOCKED}.{BLOCKED}.115.126:995/t5
  • {BLOCKED}.{BLOCKED}.50.151:995/t5
  • {BLOCKED}.{BLOCKED}.63.203:443/t5
  • {BLOCKED}.{BLOCKED}.159.67:2222/t5
  • {BLOCKED}.{BLOCKED}.111.66:995/t5
  • {BLOCKED}.{BLOCKED}.17.92:443/t5
  • {BLOCKED}.{BLOCKED}.74.165:443/t5
  • {BLOCKED}.{BLOCKED}.84.65:443/t5
  • {BLOCKED}.{BLOCKED}.186.116:2222/t5
  • {BLOCKED}.{BLOCKED}.51.138:443/t5
  • {BLOCKED}.{BLOCKED}.19.254:995/t5
  • {BLOCKED}.{BLOCKED}.184.134:995/t5
  • {BLOCKED}.{BLOCKED}.71.201:443/t5
  • {BLOCKED}.{BLOCKED}.132.224:2222/t5
  • {BLOCKED}.{BLOCKED}.173.82:995/t5
  • {BLOCKED}.{BLOCKED}.122.74:443/t5
  • {BLOCKED}.{BLOCKED}.125.215:995/t5
  • {BLOCKED}.{BLOCKED}.116.233:443/t5
  • {BLOCKED}.{BLOCKED}.91.69:443/t5
  • {BLOCKED}.{BLOCKED}.7.228:443/t5
  • {BLOCKED}.{BLOCKED}.226.137:995/t5
  • {BLOCKED}.{BLOCKED}.175.47:2222/t5
  • {BLOCKED}.{BLOCKED}.104.2:2222/t5
  • {BLOCKED}.{BLOCKED}.95.10:443/t5
  • {BLOCKED}.{BLOCKED}.97.83:995/t5

Otros detalles

Agrega las siguientes entradas de registro como parte de la rutina de instalación:

HKEY_CURRENT_USER\Software\Microsoft\
{Random}

Hace lo siguiente:

  • It checks the presence of the following Anti-Virus and Security Applications:
    • ccSvcHst.exe
    • NortonSecurity.exe
    • nsWscSvc.exe
    • avgcsrvx.exe
    • avgcsvcx.exe
    • avgcsrva.exe
    • MsMpEng.exe
    • mcshield.exe
    • avp.exe
    • kavtray.exe
    • egui.exe
    • ekrn.exe
    • bdagent.exe
    • vsserv.exe
    • vsservppl.exe
    • AvastSvc.exe
    • aswEngSrv.exe
    • aswToolsSvc.exe
    • afwServ.exe
    • aswidsagent.exe
    • AvastUI.exe
    • coreServiceShell.exe
    • PccNTMon.exe
    • NTRTScan.exe
    • SophosUI.exe
    • SAVAdminService.exe
    • SavService.exe
    • fshoster32.exe
    • WRSA.exe
    • vkise.exe
    • isesrv.exe
    • cmdagent.exe
    • Bytefence.exe
    • MBAMService.exe
    • mbamgui.exe
    • fmon.exe
    • dwengine.exe
    • dwarkdaemon.exe
    • dwwatcher.exe
    • SentinelServiceHost.exe
    • SentinelStaticEngine.exe
    • SentinelAgent.exe
    • SentinelStaticEngineScanner.exe
    • SentinelUI.exe
    • SonicWallClientProtectionService.exe
    • CynetEPS.exe
    • CynetMS.exe
    • CynetConsole.exe
    • CSFalconService.exe
    • CSFalconContainer.exe
    • RepUx.exe
    • CrAmTray.exe
    • csc_ui.exe
    • xagtnotif.exe
    • AppUIMonitor.exe
  • After it is succesful in injecting its codes into its target process, it will wipe its original binary with zeros and leave only the headers intact.
  • It establishes its persistence with the following routine:
    • It will only create its autostart registry entry if it detects that the system it is running on is about to restart or shutdown.
    • It will also write its code again in the original binary that was wiped previously before the system reboots or shutdowns.
    • When the system it is running on boots again, it would proceed to inject itself again to its target process and then proceed to wipe the binary and delete the autostart registry entry and binary.
  • It stores its encrypted configuration in the registry key that it creates.

  SOLUTION

Minimum scan engine: 9.800
First VSAPI Pattern File: 18.288.03
First VSAPI Pattern Release Date: 02 de марта de 2023
VSAPI OPR PATTERN-VERSION: 18.289.00
VSAPI OPR PATTERN DATE: 03 de марта de 2023

Step 2

Los usuarios de Windows ME y XP, antes de llevar a cabo cualquier exploración, deben comprobar que tienen desactivada la opción Restaurar sistema para permitir la exploración completa del equipo.

Step 3

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 4

Reiniciar en modo seguro

[ learnMore ]

Step 5

Deleting Scheduled Tasks

The following {Task Name} - {Task to be run} listed should be used in the steps identified below:  

  • Task Name: {Random}
    Task to be run: rundll32.exe  {Malware Full Path and Name}.dll,Wind

For Windows 2000, Windows XP, and Windows Server 2003:

  1. Open the Windows Scheduled Tasks. Click Start>Programs>Accessories>
    System Tools>Scheduled Tasks.
  2. Locate each {Task Name} values listed above in the Name column.
  3. Right-click on the said file(s) with the aforementioned value.
  4. Click on Properties. In the Run field, check for the listed {Task to be run}.
  5. If the strings match the list above, delete the task.

For Windows Vista, Windows 7, Windows Server 2008, Windows 8, Windows 8.1, and Windows Server 2012:

  1. Open the Windows Task Scheduler. To do this:
    • On Windows Vista, Windows 7, and Windows Server 2008, click Start, type taskschd.msc in the Search input field, then press Enter.
    • On Windows 8, Windows 8.1, and Windows Server 2012, right-click on the lower left corner of the screen, click Run, type taskschd.msc, then press Enter.
  2. In the left panel, click Task Scheduler Library.
  3. In the upper-middle panel, locate each {Task Name} values listed above in the Name column.
  4. In the lower-middle panel, click the Actions tab. In the Details column, check for the {Task to be run} string.
  5. If the said string is found, delete the task.

Step 6

Eliminar este valor del Registro

[ learnMore ]

Importante: si modifica el Registro de Windows incorrectamente, podría hacer que el sistema funcione mal de manera irreversible. Lleve a cabo este paso solo si sabe cómo hacerlo o si puede contar con ayuda de su administrador del sistema. De lo contrario, lea este artículo de Microsoft antes de modificar el Registro del equipo.

  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • {Random} = rundll32.exe {Malware Full Path and Name}.dll,Wind

Step 7

Eliminar esta clave del Registro

[ learnMore ]

Importante: si modifica el Registro de Windows incorrectamente, podría hacer que el sistema funcione mal de manera irreversible. Lleve a cabo este paso solo si sabe cómo hacerlo o si puede contar con ayuda de su administrador del sistema. De lo contrario, lea este artículo de Microsoft antes de modificar el Registro del equipo.

  • In HKEY_CURRENT_USER\Software\Microsoft\{Random}

Step 8

Explorar el equipo con su producto de Trend Micro para eliminar los archivos detectados como TrojanSpy.Win32.QAKBOT.YXDBN En caso de que el producto de Trend Micro ya haya limpiado, eliminado o puesto en cuarentena los archivos detectados, no serán necesarios más pasos. Puede optar simplemente por eliminar los archivos en cuarentena. Consulte esta página de Base de conocimientos para obtener más información.

Step 9

Reinicie en modo normal y explore el equipo con su producto de Trend Micro para buscar los archivos identificados como TrojanSpy.Win32.QAKBOT.YXDBN En caso de que el producto de Trend Micro ya haya limpiado, eliminado o puesto en cuarentena los archivos detectados, no serán necesarios más pasos. Puede optar simplemente por eliminar los archivos en cuarentena. Consulte esta página de Base de conocimientos para obtener más información.


Did this description help? Tell us how we did.