Analysis by: Maria Emreen Viray
ALIASES:

HackTool:Win32/Gendows (MICROSOFT)

 PLATFORM:

Windows

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

  • Threat Type: Hacking Tool

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Canal de infección Downloaded from the Internet, Dropped by other malware

This Hacking Tool arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites. It may be manually installed by a user.

  TECHNICAL DETAILS

Tamaño del archivo 3,557,008 bytes
Tipo de archivo EXE
Residente en memoria No
Fecha de recepción de las muestras iniciales 05 Jul 2018
Carga útil Drops files, Displays interface

Arrival Details

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

It may be manually installed by a user.

Installation

This Hacking Tool adds the following processes:

  • cmd.exe /A /C "cmd.exe /c takeown /f %System Root%\bootwin"
  • cmd.exe /A /C "icacls %System Root%\bootwin /grant *S-1-1-0:(F)"
  • cmd.exe /A /C "cmd.exe /c takeown /f %System Root%\JXMYB"
  • cmd.exe /A /C "icacls %System Root%\JXMYB /grant *S-1-1-0:(F)"
  • cmd.exe /A /C "%System%\cscript.exe //nologo %System%\slmgr.vbs -ilc %System Root%\{string}.XRM-MS"
  • cmd.exe /A /C "%System%\cscript.exe //nologo %System%\slmgr.vbs -ipk {random characters}"
  • cmd.exe /A /C "cmd.exe /c takeown /f %System Root%\bootwin"

(Note: %System Root% is the Windows root folder, where it usually is C:\ 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.)

Autostart Technique

This Hacking Tool drops the following files:

  • %System Root%\{string}.XRM-MS
  • %System Root%\bootsect.dat
  • %System Root%\bootsect.exe

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

Other Details

This Hacking Tool does the following:

  • It displays an interface that may be used to interact with the software.

  SOLUTION

Motor de exploración mínimo 9.800
Archivo de patrones de SSAPI: 1.305.00
Fecha de publicación del patrón SSAPI 12 Jul 2012

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

Search and delete this file

[ Learn More ]
There may be some files 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%\{string}.XRM-MS
  • %System Root%\bootsect.dat
  • %System Root%\bootsect.exe

Step 4

Scan your computer with your Trend Micro product to delete files detected as HKTL_GENDOWS. 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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