Analysis by: Thea Patrice Tajonera
 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: 2,630,064 bytes
File Type: DLL
Initial Samples Received Date: 29 Dec 2020

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 folders:

  • %System%\luminati

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

It drops the following files:

  • %System%\{Random Characters} -> deleted afterwards
  • %System%\lum_sdk32_clr.dll -> detected as PUA.Win32.Lutimani.SMA
  • %System%\msvcr120.dll
  • %System%\test_wpf.exe -> deleted after being ran as process
  • %System%\luminati\perr_04_supported_1.114.604.sent
  • %System%\luminati\lum_sdk.log
  • %System%\luminati\lum_sdk_install_id
  • %System%\lum_sdk_session_id
  • %System%\luminati\lum_sdk_exception.dmp

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

It adds the following processes:

  • %System%\test_wpf.exe

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

Other Details

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

  • http://clientsdk.{BLOCKED}ti.io:443
  • http://perr.{BLOCKED}ti.io:443
  • http://perr.{BLOCKED}ti-china.io:443
  • http://perr.{BLOCKED}tinet.com:443

  SOLUTION

Minimum Scan Engine: 9.800
SSAPI PATTERN File: 2.133.00
SSAPI PATTERN Date: 20 Dec 2018

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%\{Random Characters}
  • %System%\lum_sdk32_clr.dll
  • %System%\msvcr120.dll
  • %System%\test_wpf.exe
  • %System%\luminati\perr_04_supported_1.114.604.sent
  • %System%\luminati\lum_sdk.log
  • %System%\luminati\lum_sdk_install_id
  • %System%\lum_sdk_session_id
  • %System%\luminati\lum_sdk_exception.dmp

Step 4

Search and delete this folder

[ 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%\luminati

Step 5

Scan your computer with your Trend Micro product to delete files detected as PUA.Win32.Lutimani.SMA. 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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