PUA.Win32.Radmin.AN

January 30, 2024
 Analysis by: Raighen Sanchez
 ALIASES:

RemoteAdmin.Win32.WinVNC.c (KASPERSKY)

 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:

31,998,464 bytes

File Type:

Other

Initial Samples Received Date:

29 Jan 2024

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 adds the following processes:

  • cmd /c ""%Program Files%\UltraVNC\vnc2.bat
  • %System%\tmp\setsec_client.exe
  • %System%\tmp\setlang.exe
  • %System%\tmp\sdclient.exe
  • %System%\tmp\install_rdp.exe
  • regedit /s C:\Everser\VpsPro_Pc_Client\tmp.reg

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000(32-bit), Server 2003(32-bit), XP, Vista(64-bit), 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit) , or C:\Program Files (x86) in Windows XP(64-bit), Vista(64-bit), 7(64-bit), 8(64-bit), 8.1(64-bit), 2008(64-bit), 2012(64-bit) and 10(64-bit).. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

Other System Modifications

This Potentially Unwanted Application adds the following registry entries as part of its installation routine:

HKEY_LOCAL_MACHINE\SOFTWARE\triCerat\
Simplify

HKEY_USERS\.DEFAULT\Software\
Microsoft\Terminal Server Client

HKEY_USERS\.DEFAULT\Software\
Microsoft\Terminal Server Client\Default

HKEY_USERS\.DEFAULT\Software\
Microsoft\Terminal Server Client\Default\
Addins

HKEY_USERS\.DEFAULT\Software\
Microsoft\Terminal Server Client\Default\
Addins\SDFXP

HKEY_USERS\S-1-5-19\Software\
Microsoft\Terminal Server Client

HKEY_USERS\S-1-5-19\Software\
Microsoft\Terminal Server Client\Default

HKEY_USERS\S-1-5-19\Software\
Microsoft\Terminal Server Client\Default\
Addins

HKEY_USERS\S-1-5-19\Software\
Microsoft\Terminal Server Client\Default\
Addins\SDFXP

HKEY_USERS\S-1-5-20\Software\
Microsoft\Terminal Server Client

HKEY_USERS\S-1-5-20\Software\
Microsoft\Terminal Server Client\Default

HKEY_USERS\S-1-5-20\Software\
Microsoft\Terminal Server Client\Default\
Addins

HKEY_USERS\S-1-5-20\Software\
Microsoft\Terminal Server Client\Default\
Addins\SDFXP

HKEY_CURRENT_USER\Software\Microsoft\
Terminal Server Client\Default\AddIns\
SDFXP

It modifies the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\triCerat\
Simplify
GUILanguage = ENG

HKEY_USERS\.DEFAULT\Software\
Microsoft\Terminal Server Client\Default\
Addins\SDFXP
Name = %System%\sdrdp5.dll

HKEY_USERS\.DEFAULT\Software\
Microsoft\Terminal Server Client\Default\
Addins\SDFXP
REMOTECONTROLPERSISTENT = 0

HKEY_USERS\.DEFAULT\Software\
Microsoft\Terminal Server Client\Default\
Addins\SDFXP
PCoIPEnabled = 1

HKEY_USERS\S-1-5-19\Software\
Microsoft\Terminal Server Client\Default\
Addins\SDFXP
Name = %System%\sdrdp5.dll

HKEY_USERS\S-1-5-19\Software\
Microsoft\Terminal Server Client\Default\
Addins\SDFXP
REMOTECONTROLPERSISTENT = 0

HKEY_USERS\S-1-5-19\Software\
Microsoft\Terminal Server Client\Default\
Addins\SDFXP
PCoIPEnabled = 1

HKEY_USERS\S-1-5-20\Software\
Microsoft\Terminal Server Client\Default\
Addins\SDFXP
Name = %System%\sdrdp5.dll

HKEY_USERS\S-1-5-20\Software\
Microsoft\Terminal Server Client\Default\
Addins\SDFXP
REMOTECONTROLPERSISTENT = 0

HKEY_USERS\S-1-5-20\Software\
Microsoft\Terminal Server Client\Default\
Addins\SDFXP
PCoIPEnabled = 1

HKEY_CURRENT_USER\Software\Microsoft\
Terminal Server Client\Default\AddIns\
SDFXP
Name = %System%\sdrdp5.dll

HKEY_CURRENT_USER\Software\Microsoft\
Terminal Server Client\Default\AddIns\
SDFXP
REMOTECONTROLPERSISTENT = 0

HKEY_CURRENT_USER\Software\Microsoft\
Terminal Server Client\Default\AddIns\
SDFXP
PCoIPEnabled = 1

  SOLUTION

Minimum Scan Engine:

9.800

SSAPI PATTERN File:

2.613.00

SSAPI PATTERN Date:

12 Apr 2023

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 key

[ 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_LOCAL_MACHINE\SOFTWARE\triCerat\Simplify
  • In HKEY_USERS\.DEFAULT\Software\Microsoft\Terminal Server Client
  • In HKEY_USERS\.DEFAULT\Software\Microsoft\Terminal Server Client\Default
  • In HKEY_USERS\.DEFAULT\Software\Microsoft\Terminal Server Client\Default\Addins
  • In HKEY_USERS\.DEFAULT\Software\Microsoft\Terminal Server Client\Default\Addins\SDFXP
  • In HKEY_USERS\S-1-5-19\Software\Microsoft\Terminal Server Client
  • In HKEY_USERS\S-1-5-19\Software\Microsoft\Terminal Server Client\Default
  • In HKEY_USERS\S-1-5-19\Software\Microsoft\Terminal Server Client\Default\Addins
  • In HKEY_USERS\S-1-5-19\Software\Microsoft\Terminal Server Client\Default\Addins\SDFXP
  • In HKEY_USERS\S-1-5-20\Software\Microsoft\Terminal Server Client
  • In HKEY_USERS\S-1-5-20\Software\Microsoft\Terminal Server Client\Default
  • In HKEY_USERS\S-1-5-20\Software\Microsoft\Terminal Server Client\Default\Addins
  • In HKEY_USERS\S-1-5-20\Software\Microsoft\Terminal Server Client\Default\Addins\SDFXP
  • In HKEY_CURRENT_USER\Software\Microsoft\Terminal Server Client\Default\AddIns\SDFXP

Step 4

Scan your computer with your Trend Micro product to delete files detected as PUA.Win32.Radmin.AN. 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.