Analysis by: John Rainier Navato
 Modified by: James Christopher Waniwan
 PLATFORM:

Windows

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

  • Threat Type: Potentially Unwanted Application

  • Destructiveness: No

  • Encrypted: No

  • 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: 166,400 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 15 Sep 2025
Payload: Connects to URLs/IPs, Downloads files, Drops files, Steals information

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 Root%\screenshot → deleted afterwards
  • %User Temp%\{4 Random Characters}.tmp → deleted afterwards
  • %User Temp%\{4 Random Characters}.tmp\{4 Random Characters}.tmp → deleted afterwards

(Note: %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It drops the following files:

  • %AppDataLocal%\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
  • %System Root%\screenshot\MAC.txt → deleted afterwards
  • %System Root%\screenshot\MAC1.txt → deleted afterwards
  • %User Temp%\{4 Random Characters}.tmp → deleted afterwards
  • %User Temp%\{4 Random Characters}.tmp\{4 Random Characters}.tmp → deleted afterwards
  • %User Temp%\{4 Random Characters}.tmp\{4 Random Characters}.tmp\{4 Random Characters}.bat
  • %User Temp%\{4 Random Characters}.tmp\{4 Random Characters}.tmp\{4 Random Characters}.tmp → deleted afterwards
  • %User Temp%\{8 Random Characters}.{3 Random Characters}.ps1 → deleted afterwards
  • %User Temp%\{8 Random Characters}.{3 Random Characters}.psm1 → deleted afterwards

(Note: %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It adds the following processes:

  • "%System%\cmd" /c "%User Temp%\{4 Random Characters}.tmp\{4 Random Characters}.tmp\{4 Random Characters}.bat %System Root%\{Grayware File Path}\{Grayware File Name}.{Grayware File Extension}"
  • %System%\cmd.exe /S /D /c" date"
  • %System%\cmd.exe /S /D /c" echo "
  • %System%\cmd.exe /c %System%\wbem\wmic baseboard get SerialNumber /format:csv
  • %System%\cmd.exe /c %System%\wbem\wmic bios get serialnumber /format:csv
  • %System%\cmd.exe /c date /t
  • %System%\cmd.exe /c echo |date
  • %System%\net use z: /delete
  • %System%\net use z: \{BLOCKED}.{BLOCKED}.0.1\oemwin\OSlog
  • %System%\net use z: \{BLOCKED}.{BLOCKED}.0.1\oemwin\OSlog /user:user pass
  • %System%\wbem\wmic baseboard get SerialNumber /format:csv
  • %System%\wbem\wmic bios get serialnumber /format:csv
  • powershell -command "Get-Content %System Root%\screenshot\binary\superinfo.html | Set-Content -Encoding utf8 %System Root%\screenshot\binary\superinfo1.html"
  • powershell -command "Get-Content %System Root%\screenshot\binary\sysinfot.txt | Set-Content -Encoding utf8 %System Root%\screenshot\binary\sysinfo.txt"
  • powershell -command "Get-Content %System Root%\screenshot\MAC.txt | Set-Content -Encoding ascii %System Root%\screenshot\MAC1.txt"
  • powershell -executionpolicy bypass -file %System Root%\screenshot\binary\testinfo.ps1
  • wmic nic where (AdapterTypeId=0 AND netConnectionStatus=2) get MACAddress
  • xcopy /s \{BLOCKED}.{BLOCKED}.0.1\prodos\Script\screenshot %System Root%\screenshot\

Download Routine

This Potentially Unwanted Application connects to the following URL(s) to download its configuration file:

  • http://{BLOCKED}.{BLOCKED}.0.1/oemwin/SERVER

It connects to the following URL(s) to download its component file(s):

  • http://{BLOCKED}.{BLOCKED}.0.1/oemwin/OSlog
  • http://{BLOCKED}.{BLOCKED}.0.1/prodos/Script/screenshot

Other Details

This Potentially Unwanted Application does the following:

  • It gathers the following data:
    • MAC address
    • BIOS serial number
    • MotherBoard Serial Number
    • Date and Time now
    • System Information
    • DMI
    • Screenshot
    • Windows Version
    • Windows Product Name
  • It sends the gathered information via HTTP Post to the following URL:
    • http://super-spm.{BLOCKED}icro.com/order/cburntestresult.asp
    • http://super-spm-tw.{BLOCKED}icro.com:2888/order/cburntestresult.asp
    • http://super-spm-nl.{BLOCKED}icro.com/order/cburntestresult.asp

  SOLUTION

Minimum Scan Engine: 9.800
SSAPI PATTERN File: 2.881.00
SSAPI PATTERN Date: 09 Oct 2025

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 these files

[ 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.  
  • %AppDataLocal%\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
  • %System Root%\screenshot\MAC.txt
  • %System Root%\screenshot\MAC1.txt
  • %User Temp%\{4 Random Characters}.tmp
  • %User Temp%\{4 Random Characters}.tmp\{4 Random Characters}.tmp
  • %User Temp%\{4 Random Characters}.tmp\{4 Random Characters}.tmp\{4 Random Characters}.bat
  • %User Temp%\{4 Random Characters}.tmp\{4 Random Characters}.tmp\{4 Random Characters}.tmp
  • %User Temp%\{8 Random Characters}.{3 Random Characters}.ps1
  • %User Temp%\{8 Random Characters}.{3 Random Characters}.psm1

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%\screenshot
  • %User Temp%\{4 Random Characters}.tmp
  • %User Temp%\{4 Random Characters}.tmp\{4 Random Characters}.tmp

Step 5

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