PUA_REMOTEADMIN.GA

June 12, 2018
 Analysis by: John Donnie Celestre
 ALIASES:

Trojan.GenericKD.30941487 (BITDEFENDER), a variant of Win32/RemoteAdmin.NetSupportManager.D (NOD32)

 PLATFORM:

Windows

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

  • Threat Type: Potentially Unwanted Application

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Potentially Unwanted Application 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:

7,443,848 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

09 Jun 2018

Arrival Details

This Potentially Unwanted Application 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 Potentially Unwanted Application drops the following files:

  • %System Root%\temp\__tmp_rar_sfx_access_check_{random numbers}
  • %System Root%\temp\windows (1).ico
  • %System Root%\temp\images_{random string}.png
  • %System Root%\temp\WinSupport\AudioCapture.dll
  • %System Root%\temp\WinSupport\clhook4.dll
  • %System Root%\temp\WinSupport\client32.ini
  • %System Root%\temp\WinSupport\Control.kbd
  • %System Root%\temp\WinSupport\CryptPak.dll
  • %System Root%\temp\WinSupport\DBI.EXE
  • %System Root%\temp\WinSupport\gdihook5.dll
  • %System Root%\temp\WinSupport\gdihook5.INF
  • %System Root%\temp\WinSupport\gdihook5.sys
  • %System Root%\temp\WinSupport\HTCTL32.DLL
  • %System Root%\temp\WinSupport\IPBR32.DLL
  • %System Root%\temp\WinSupport\IPCTL32.DLL
  • %System Root%\temp\WinSupport\msvcr100.dll
  • %System Root%\temp\WinSupport\NBBR32.DLL
  • %System Root%\temp\WinSupport\Nbctl32.dll
  • %System Root%\temp\WinSupport\NBCTLA0.DLL
  • %System Root%\temp\WinSupport\NBCTLA1.DLL
  • %System Root%\temp\WinSupport\NBCTLA2.DLL
  • %System Root%\temp\WinSupport\NBCTLA3.DLL
  • %System Root%\temp\WinSupport\NBCTLA4.DLL
  • %System Root%\temp\WinSupport\NBCTLA5.DLL
  • %System Root%\temp\WinSupport\NBCTLA6.DLL
  • %System Root%\temp\WinSupport\NBCTLA7.DLL
  • %System Root%\temp\WinSupport\nskbfltr.inf
  • %System Root%\temp\WinSupport\nskbfltr.sys
  • %System Root%\temp\WinSupport\NSM.ini
  • %System Root%\temp\WinSupport\NSM.LIC
  • %System Root%\temp\WinSupport\nsmexec.exe
  • %System Root%\temp\WinSupport\nspscr.inf
  • %System Root%\temp\WinSupport\nspscr.sys
  • %System Root%\temp\WinSupport\NSToast.exe
  • %System Root%\temp\WinSupport\pcicapi.dll
  • %System Root%\temp\WinSupport\pcicfgui.exe
  • %System Root%\temp\WinSupport\PCICHEK.DLL
  • %System Root%\temp\WinSupport\PCICL32.DLL
  • %System Root%\temp\WinSupport\pciconn.exe
  • %System Root%\temp\WinSupport\pcigina.dll
  • %System Root%\temp\WinSupport\PCIHOOKS.DLL
  • %System Root%\temp\WinSupport\PCIinv.dll
  • %System Root%\temp\WinSupport\PCIMON.DLL
  • %System Root%\temp\WinSupport\pcimonhook.dll
  • %System Root%\temp\WinSupport\PCIMSG.DLL
  • %System Root%\temp\WinSupport\pcisys.sys
  • %System Root%\temp\WinSupport\PCIVDD.DLL
  • %System Root%\temp\WinSupport\pscrinst.dll
  • %System Root%\temp\WinSupport\remcmdstub.exe
  • %System Root%\temp\WinSupport\shfolder.dll
  • %System Root%\temp\WinSupport\TCBR32.DLL
  • %System Root%\temp\WinSupport\TCCTL32.DLL
  • %System Root%\temp\WinSupport\VolumeControlWXP.DLL
  • %System Root%\temp\WinSupport\WdfCoInstaller01005.dll
  • %AppDataLocal%\NetSupport\NetSupport Manager\{%COMPUTERNAME%}_HF.bin
  • %AppDataLocal%\NetSupport\NetSupport Manager\{%COMPUTERNAME%}_HW.bin
  • %AppDataLocal%\NetSupport\NetSupport Manager\{%COMPUTERNAME%}_SW.bin

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

It drops and executes the following files:

  • %System Root%\temp\WinSupport.exe
  • %System Root%\temp\WinSupport\client32.exe

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

It creates the following folders:

  • %AppDataLocal%\NetSupport
  • %AppDataLocal%\NetSupport\NetSupport Manager
  • %System Root%\temp
  • %System Root%\temp\WinSupport

(Note: %AppDataLocal% is the Application Data folder found in Local Settings, where it is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.)

Other Details

This Potentially Unwanted Application connects to the following possibly malicious URL:

  • http://ih967609.vds.{BLOCKED}r.ru:4141
  • http://geo.{BLOCKED}ortsoftware.com/location/loca.asp

  SOLUTION

Minimum Scan Engine:

9.850

SSAPI PATTERN File:

1.971.00

SSAPI PATTERN Date:

14 Jun 2018

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 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

Remove malware/grayware files dropped/downloaded by PUA_REMOTEADMIN.GA. (Note: Please skip this step if the threats listed below have already been removed.)

     
    • %System Root%\temp\WinSupport.exe
    • %System Root%\temp\WinSupport\client32.exe

Step 4

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%\temp
  • %AppDataLocal%\NetSupport

Step 5

Scan your computer with your Trend Micro product to delete files detected as PUA_REMOTEADMIN.GA. 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:


Did this description help? Tell us how we did.