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PUA.Win32.RAdmin.C

May 09, 2024
 Analysis by: Leidryn Saludez
 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

Infection Channel:

Downloaded from the Internet, Dropped by other malware


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:

5,109,468 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

03 May 2024

Payload:

Creates files, Drops files, Deletes files, Modifies system registry

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\winet\__tmp_rar_sfx_access_check_5814422
  • %System Root%\temp\winet\addperm.bat
  • %System Root%\temp\winet\advapi32.dll
  • %System Root%\temp\winet\Bc450rtl.dll
  • %System Root%\temp\winet\CDinfo.exe
  • %System Root%\temp\winet\CDinfo_6.exe
  • %System Root%\temp\winet\CDinfo_6_Sub.exe
  • %System Root%\temp\winet\COMCTL32.DLL
  • %System Root%\temp\winet\Connects\Wait for Call.cnn
  • %System Root%\temp\winet\Connects\winwin\HU.INI
  • %System Root%\temp\winet\Connects\winwin\Wait for Call.cnn
  • %System Root%\temp\winet\cpuz.sys
  • %System Root%\temp\winet\cpuz.vxd
  • %System Root%\temp\winet\Delete_Rule.bat
  • %System Root%\temp\winet\DMIDECODE.BAT
  • %System Root%\temp\winet\dmidecode.exe
  • %System Root%\temp\winet\Enable_Rule.bat
  • %System Root%\temp\winet\Encryption.exe
  • %System Root%\temp\winet\FileMon.ilk
  • %System Root%\temp\winet\GetInfo.dat
  • %System Root%\temp\winet\GetPc_s.exe
  • %System Root%\temp\winet\hodll.dll
  • %System Root%\temp\winet\Hook1.dll
  • %System Root%\temp\winet\Hook2.dll
  • %System Root%\temp\winet\HU.MUA
  • %System Root%\temp\winet\Hu.ss
  • %System Root%\temp\winet\Hu2egn.dll
  • %System Root%\temp\winet\Hu2hks.dll
  • %System Root%\temp\winet\Hu2lib.dll
  • %System Root%\temp\winet\hu2res.dll
  • %System Root%\temp\winet\Hu2sys.exe
  • %System Root%\temp\winet\huap.dll
  • %System Root%\temp\winet\HuCheck5.exe
  • %System Root%\temp\winet\Hudcomm.dll
  • %System Root%\temp\winet\HuDevice.dll
  • %System Root%\temp\winet\HuDriver.dll
  • %System Root%\temp\winet\HuEndeco.dll
  • %System Root%\temp\winet\HuExec.exe
  • %System Root%\temp\winet\HuFindFL.exe
  • %System Root%\temp\winet\Huft.dll
  • %System Root%\temp\winet\hufwalk.dll
  • %System Root%\temp\winet\huinven.dll
  • %System Root%\temp\winet\hulib.dll
  • %System Root%\temp\winet\Hulog.dll
  • %System Root%\temp\winet\HuLogin.exe
  • %System Root%\temp\winet\Huncomm.dll
  • %System Root%\temp\winet\HuREgn.dll
  • %System Root%\temp\winet\HuRes.dll
  • %System Root%\temp\winet\HuRes2.dll
  • %System Root%\temp\winet\hures2_GB.dll
  • %System Root%\temp\winet\HuService.exe
  • %System Root%\temp\winet\husmtp.dll
  • %System Root%\temp\winet\Hutcomm.dll
  • %System Root%\temp\winet\Huuacnt.dll
  • %System Root%\temp\winet\Huui.dll
  • %System Root%\temp\winet\HuUSBw2k.exe
  • %System Root%\temp\winet\HuWWin.exe
  • %System Root%\temp\winet\hu_98.mua
  • %System Root%\temp\winet\Implode.dll
  • %System Root%\temp\winet\install.dat
  • %System Root%\temp\winet\Install64Driver.exe
  • %System Root%\temp\winet\MSVBVM60.DLL
  • %System Root%\temp\winet\NMSAccessU.exe
  • %System Root%\temp\winet\NMSDVDXU.dll
  • %System Root%\temp\winet\ntfsf.208
  • %System Root%\temp\winet\ntfsf.inf
  • %System Root%\temp\winet\ntfsf.vis
  • %System Root%\temp\winet\ntfsf.w23
  • %System Root%\temp\winet\ntfsf.w2k
  • %System Root%\temp\winet\ntfsf.w7
  • %System Root%\temp\winet\ntfsf.wxp
  • %System Root%\temp\winet\ntfsf6.208
  • %System Root%\temp\winet\ntfsf6.208_64
  • %System Root%\temp\winet\ntfsf6.208_x64
  • %System Root%\temp\winet\ntfsf6.inf
  • %System Root%\temp\winet\ntfsf6.vis
  • %System Root%\temp\winet\ntfsf6.w23
  • %System Root%\temp\winet\ntfsf6.w2k
  • %System Root%\temp\winet\ntfsf6.w7
  • %System Root%\temp\winet\ntfsf6.w7_64
  • %System Root%\temp\winet\ntfsf6.w7_x64
  • %System Root%\temp\winet\ntfsf6.wxp
  • %System Root%\temp\winet\pcinfo.exe
  • %System Root%\temp\winet\pc_s.dll
  • %System Root%\temp\winet\Pkwdcl.dll
  • %System Root%\temp\winet\Presto.agn
  • %System Root%\temp\winet\presto.aip
  • %System Root%\temp\winet\Presto.opt
  • %System Root%\temp\winet\presto.que
  • %System Root%\temp\winet\PTinfo_6.exe
  • %System Root%\temp\winet\ReadDMI.exe
  • %System Root%\temp\winet\RMS.exe
  • %System Root%\temp\winet\rsensor.exe
  • %System Root%\temp\winet\sendinfo.dat
  • %System Root%\temp\winet\Senini.exe
  • %System Root%\temp\winet\sensetup.exe
  • %System Root%\temp\winet\SERVICES.EXE
  • %System Root%\temp\winet\SetClientVI.exe
  • %System Root%\temp\winet\SetRAR_20100427.bat
  • %System Root%\temp\winet\smr.ico
  • %System Root%\temp\winet\subinacl.exe
  • %System Root%\temp\winet\USB_SN.exe
  • %System Root%\temp\winet\Winet.ln_
  • %System Root%\temp\winet\WM_MISC.exe
  • %System Root%\temp\winet\WNCall.exe
  • %System Root%\temp\winet\WNCall_GB.exe
  • %System Root%\temp\winet\XceedCry.dll

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

It adds the following processes:

  • %System Root%\temp\winet\SetClientVI.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:

  • %System Root%\temp
  • %System Root%\temp\winet
  • %System Root%\temp\winet\Connects
  • %System Root%\temp\winet\Connects\winwin

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

Other System Modifications

This Potentially Unwanted Application deletes the following files:

  • %System Root%\temp\winet\__tmp_rar_sfx_access_check_5814422

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

It adds the following registry entries as part of its installation routine:

HKEY_CURRENT_USER\Software\WinRAR SFX
c%%temp%winet = %System Root%\temp\winet

  SOLUTION

Minimum Scan Engine:

9.800

SSAPI PATTERN File:

2.724.54

SSAPI PATTERN Date:

09 May 2024

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

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\WinRAR SFX
    • c%%temp%winet = %System Root%\temp\winet

Step 4

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%\temp\winet\__tmp_rar_sfx_access_check_5814422
  • %System Root%\temp\winet\addperm.bat
  • %System Root%\temp\winet\advapi32.dll
  • %System Root%\temp\winet\Bc450rtl.dll
  • %System Root%\temp\winet\CDinfo.exe
  • %System Root%\temp\winet\CDinfo_6.exe
  • %System Root%\temp\winet\CDinfo_6_Sub.exe
  • %System Root%\temp\winet\COMCTL32.DLL
  • %System Root%\temp\winet\Connects\Wait for Call.cnn
  • %System Root%\temp\winet\Connects\winwin\HU.INI
  • %System Root%\temp\winet\Connects\winwin\Wait for Call.cnn
  • %System Root%\temp\winet\cpuz.sys
  • %System Root%\temp\winet\cpuz.vxd
  • %System Root%\temp\winet\Delete_Rule.bat
  • %System Root%\temp\winet\DMIDECODE.BAT
  • %System Root%\temp\winet\dmidecode.exe
  • %System Root%\temp\winet\Enable_Rule.bat
  • %System Root%\temp\winet\Encryption.exe
  • %System Root%\temp\winet\FileMon.ilk
  • %System Root%\temp\winet\GetInfo.dat
  • %System Root%\temp\winet\GetPc_s.exe
  • %System Root%\temp\winet\hodll.dll
  • %System Root%\temp\winet\Hook1.dll
  • %System Root%\temp\winet\Hook2.dll
  • %System Root%\temp\winet\HU.MUA
  • %System Root%\temp\winet\Hu.ss
  • %System Root%\temp\winet\Hu2egn.dll
  • %System Root%\temp\winet\Hu2hks.dll
  • %System Root%\temp\winet\Hu2lib.dll
  • %System Root%\temp\winet\hu2res.dll
  • %System Root%\temp\winet\Hu2sys.exe
  • %System Root%\temp\winet\huap.dll
  • %System Root%\temp\winet\HuCheck5.exe
  • %System Root%\temp\winet\Hudcomm.dll
  • %System Root%\temp\winet\HuDevice.dll
  • %System Root%\temp\winet\HuDriver.dll
  • %System Root%\temp\winet\HuEndeco.dll
  • %System Root%\temp\winet\HuExec.exe
  • %System Root%\temp\winet\HuFindFL.exe
  • %System Root%\temp\winet\Huft.dll
  • %System Root%\temp\winet\hufwalk.dll
  • %System Root%\temp\winet\huinven.dll
  • %System Root%\temp\winet\hulib.dll
  • %System Root%\temp\winet\Hulog.dll
  • %System Root%\temp\winet\HuLogin.exe
  • %System Root%\temp\winet\Huncomm.dll
  • %System Root%\temp\winet\HuREgn.dll
  • %System Root%\temp\winet\HuRes.dll
  • %System Root%\temp\winet\HuRes2.dll
  • %System Root%\temp\winet\hures2_GB.dll
  • %System Root%\temp\winet\HuService.exe
  • %System Root%\temp\winet\husmtp.dll
  • %System Root%\temp\winet\Hutcomm.dll
  • %System Root%\temp\winet\Huuacnt.dll
  • %System Root%\temp\winet\Huui.dll
  • %System Root%\temp\winet\HuUSBw2k.exe
  • %System Root%\temp\winet\HuWWin.exe
  • %System Root%\temp\winet\hu_98.mua
  • %System Root%\temp\winet\Implode.dll
  • %System Root%\temp\winet\install.dat
  • %System Root%\temp\winet\Install64Driver.exe
  • %System Root%\temp\winet\MSVBVM60.DLL
  • %System Root%\temp\winet\NMSAccessU.exe
  • %System Root%\temp\winet\NMSDVDXU.dll
  • %System Root%\temp\winet\ntfsf.208
  • %System Root%\temp\winet\ntfsf.inf
  • %System Root%\temp\winet\ntfsf.vis
  • %System Root%\temp\winet\ntfsf.w23
  • %System Root%\temp\winet\ntfsf.w2k
  • %System Root%\temp\winet\ntfsf.w7
  • %System Root%\temp\winet\ntfsf.wxp
  • %System Root%\temp\winet\ntfsf6.208
  • %System Root%\temp\winet\ntfsf6.208_64
  • %System Root%\temp\winet\ntfsf6.208_x64
  • %System Root%\temp\winet\ntfsf6.inf
  • %System Root%\temp\winet\ntfsf6.vis
  • %System Root%\temp\winet\ntfsf6.w23
  • %System Root%\temp\winet\ntfsf6.w2k
  • %System Root%\temp\winet\ntfsf6.w7
  • %System Root%\temp\winet\ntfsf6.w7_64
  • %System Root%\temp\winet\ntfsf6.w7_x64
  • %System Root%\temp\winet\ntfsf6.wxp
  • %System Root%\temp\winet\pcinfo.exe
  • %System Root%\temp\winet\pc_s.dll
  • %System Root%\temp\winet\Pkwdcl.dll
  • %System Root%\temp\winet\Presto.agn
  • %System Root%\temp\winet\presto.aip
  • %System Root%\temp\winet\Presto.opt
  • %System Root%\temp\winet\presto.que
  • %System Root%\temp\winet\PTinfo_6.exe
  • %System Root%\temp\winet\ReadDMI.exe
  • %System Root%\temp\winet\RMS.exe
  • %System Root%\temp\winet\rsensor.exe
  • %System Root%\temp\winet\sendinfo.dat
  • %System Root%\temp\winet\Senini.exe
  • %System Root%\temp\winet\sensetup.exe
  • %System Root%\temp\winet\SERVICES.EXE
  • %System Root%\temp\winet\SetClientVI.exe
  • %System Root%\temp\winet\SetRAR_20100427.bat
  • %System Root%\temp\winet\smr.ico
  • %System Root%\temp\winet\subinacl.exe
  • %System Root%\temp\winet\USB_SN.exe
  • %System Root%\temp\winet\Winet.ln_
  • %System Root%\temp\winet\WM_MISC.exe
  • %System Root%\temp\winet\WNCall.exe
  • %System Root%\temp\winet\WNCall_GB.exe
  • %System Root%\temp\winet\XceedCry.dll

Step 5

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
  • %System Root%\temp\winet
  • %System Root%\temp\winet\Connects
  • %System Root%\temp\winet\Connects\winwin

Step 6

Scan your computer with your Trend Micro product to delete files detected as PUA.Win32.RAdmin.C. 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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