Analysis by: Mariefher Grace Villanueva
 PLATFORM:

Windows

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

This Backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It executes commands from a remote malicious user, effectively compromising the affected system. It connects to a website to send and receive information.

  TECHNICAL DETAILS

File Size: 5,290,496 bytes
File Type: DLL
Memory Resident: Yes
Initial Samples Received Date: 19 May 2026

Arrival Details

This Backdoor 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 Backdoor drops the following files:

  • %TEMP%\{9 random characters}.ocx → a clean Microsoft DUI70.dll carried as embedded data and dropped to act as the sideload host for a follow-on hijack chain
  • %APPDATA%\{host_process_image_name} → Stage 4 .NET payload written to disk for persistence

It adds the following mutexes to ensure that only one of its copies runs at any one time:

  • Tpigja

Backdoor Routine

This Backdoor executes the following commands from a remote malicious user:

  • Beacon refresh → Resends victim information
  • On-demand screenshot
  • Browser credential / cookie / autofill / history theft
  • Cryptocurrency wallet browser extension theft
  • Local desktop wallet theft
  • Foxmail + Telegram Desktop session theft
  • Configuration update / C2 rotation
  • Persistence reinforcement / re-drop
  • Webcam enumeration
  • Module staging (arbitrary operator payload)

It connects to the following websites to send and receive information:

  • http://152.89.{BLOCKED}4.113:56001
  • http://152.89.{BLOCKED}4.113:56002
  • http://152.89.{BLOCKED}4.113:56003

It posts the following information to its command and control (C&C) server:

  • Machine identifier
  • Operating system caption
  • CPU identifier
  • Physical memory total
  • Disk serial number
  • Installed antivirus product
  • Current user / hostname
  • Current image path
  • Remote IP and port in use
  • Uptime
  • Primary-display screenshot
  • Camera / imaging device inventory

Information Theft

This Backdoor gathers the following data:

  • Cryptocurrency wallet seed phrases, private keys, and saved password material from 48 browser-extension wallets and 2FA authenticators:
    • MetaMask (nkbihfbeogaeaoehlefnkodbefgpgknn)
    • TronLink (ibnejdfjmmkpcnlpebklmnkoeoihofec)
    • Binance Chain Wallet (fhbohimaelbohpjbbldcngcnapndodjp)
    • Phantom (bfnaelmomeimhlpmgjnjophhpkkoljpa)
    • Coinbase Wallet (hnfanknocfeofbddgcijnmhnfnkdnaad)
    • Trust Wallet (egjidjbpglichdcondbcbdnbeeppgdph)
    • Jaxx Liberty (cjelfplplebdjjenllpjcblmjkfcffne)
    • Yoroi (ffnbelfdoeiohenkjibnmadjiehjhajb)
    • BitApp Wallet (fihkakfobkmkjojpchpfgcmhfjnmnfpi)
    • iWallet (kncchdigobghenbbaddojjnnaogfppfj)
    • Terra Station (aiifbnbfobpmeekipheeijimdpnlpgpp)
    • BitClip (ijmpgkjfkbfhoebgogflfebnmejmfbml)
    • EQUAL Wallet (blnieiiffboillknjnepogjhkgnoapac)
    • Wombat (amkmjjmmflddogmhpjloimipbofnfjih)
    • Nifty Wallet (jbdaocneiiinmjbjlgalhcelgbejmnid)
    • Math Wallet (afbcbjpbpfadlkmhmclhkeeodmamcflc)
    • Guarda (hpglfhgfnhbgpjdenjgmdgoeiappafln)
    • Coin98 Wallet (aeachknmefphepccionboohckonoeemg)
    • Trezor Password Manager (imloifkgjagghnncjkhggdhalmcnfklk)
    • EOS Authenticator (oeljdldpnmdbchonielidgobddffflal)
    • Authy (gaedmjdfmmahhbjefcbgaolhhanlaolb)
    • GAuth Authenticator (ilgcnhelpchnceeipipijaljkblbcobl)
    • Authenticator (bhghoamapcdpbohphigoooaddinpkbai)
    • TezBox (mnfifefkajgofkcjkemidiaecocnkjeh)
    • Cyano Wallet (dkdedlpgdmmkkfjabffeganieamfklkm)
    • Exodus Web3 (aholpfdialjgjfhomihkjbmgjidlcdno)
    • BitKeep (jiidiaalihmmhddjgbnbgdfflelocpak)
    • MOBOX WALLET (fcckkdbjnoikooededlapcalpionmalo)
    • XDCPay (bocpokimicclpaiekenaeelehdjllofo)
    • ICONex (flpiciilemghbmfalicajoolhkkenfel)
    • Solana Wallet (hfljlochmlccoobkbcgpmkpjagogcgpk)
    • Swash (cmndjbecilbocjfkibfbifhngkdmjgog)
    • Finnie (cjmkndjhnagcfbpiemnkdpomccnjblmj)
    • Keplr (dmkamcknogkgcdfhhbddcghachkejeap)
    • Liquality Wallet (kpfopkelmapcoipemfendmdcghnegimn)
    • Rabet (hgmoaheomcjnaheggkfafnjilfcefbmo)
    • Ronin Wallet (fnjhmkhhmkbjkkabndcnnogagogbneec)
    • ZilPay (klnaejjgbibmhlephnhpmaofohgkpgkd)
    • XDEFI Wallet (ejbalbakoplchlghecdalmeeeajnimhm)
    • XDEFI Wallet (hmeobnfnfcmdkdcmlblgagmfpfboieaf)
    • Exodus Web3 (ghocjofkdpicneaokfekohclmkfmepbp)
    • Trust Wallet (heaomjafhiehddpnmncmhhpjaloainkn)
    • Braavos Smart Wallet (hkkpjehhcnhgefhbdcgfkeegglpjchdc)
    • Braavos Smart Wallet (akoiaibnepcedcplijmiamnaigbepmcb)
    • MetaMask (djclckkglechooblngghdinmeemkbgci)
    • Guarda Wallet (acdamagkdfmpkclpoglgnbddngblgibo)
    • Guarda Wallet (okejhknhopdbemmfefjglkdfdhpfmflg)
    • Waves Keeper (mijjdbgpgbflkaooedaemnlciddmamai)
  • Browser-stored credentials, saved passwords, cookies, and autofill data from 30+ Chromium-family browser profiles:
    • Chromium
    • Google Chrome (Standard and (x86) paths)
    • Microsoft Edge
    • Brave (BraveSoftware)
    • Tencent QQBrowser
    • ChromePlus
    • Iridium
    • 7Star
    • CentBrowser
    • Chedot
    • Vivaldi
    • Kometa
    • Elements Browser
    • Epic Privacy Browser
    • Uran (uCozMedia)
    • Sleipnir5 (Fenrir Inc)
    • Citrio (CatalinaGroup)
    • Coowon
    • liebao
    • QIP Surf
    • Orbitum
    • Comodo Dragon
    • Amigo
    • Torch
    • Comodo (base)
    • 360Browser
    • Maxthon3
    • K-Melon
    • Sputnik
    • Nichrome
    • CocCoc
    • Chromodo
    • Mail.Ru Atom
  • Local desktop wallet files:
    • Bitcoin-Qt
    • Litecoin-Qt
    • Dash-Qt
    • Zcash
    • Ethereum
    • Electrum
    • Exodus
    • Jaxx Liberty
    • Atomic Wallet
    • Ledger Live
  • Data from email and communication clients:
    • Foxmail (profile data)
    • Telegram Desktop (session data)
  • Real-time JPEG screenshots of the primary display
  • Victim machine identity, operating system version, CPU model, physical memory, disk serial number, antivirus product name, user name, hostname, current image path
  • Webcam and imaging-device inventory (PnP enumeration, enabling subsequent capture commands)

Other Details

This Backdoor adds the following registry keys:

HKEY_CURRENT_USER\Software
{32-char hex machine ID} =

It does the following:

  • Multi-stage in-memory unpacking → The four execution stages (Stage 1 native loader → Stage 2 OCX-resident shellcode → Stage 3 .NET intermediate loader → Stage 4 .NET RAT) reduce on-disk evidence to a single sub-20 KB DLL. Stages 3 and 4 are never written to disk during normal operation.
  • Anti-virtualization → Stage 1 enforces a WMI display-refresh-rate gate that traps execution inside a Sleep polling loop on most virtualized hosts
  • Hidden self-restart → Unhandled exceptions cause the .NET payload to re-launch its own image with CreateNoWindow=true, WindowStyle=Hidden, then exit the failing process cleanly.
  • The sample is engineered to be sideloaded by a legitimate component of Qihoo 360 Total Security and requires an environment where Qihoo 360 Total Security is installed in order for it to proceed with its intended routine.

It adds the following scheduled tasks:

  • Task Name: {host_process_image_name}
    Action: New-ScheduledTaskAction -Execute %APPDATA%\{host_process_image_name}'
    Trigger: -Once -At (Get-Date) -RepetitionInterval (New-TimeSpan -Minutes 5)
    User: $env:UserName -RunLevel Highest
    Settings: -ExecutionTimeLimit (New-TimeSpan -Seconds 0)
    -AllowStartIfOnBatteries -DontStopIfGoingOnBatteries

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 20.980.01
FIRST VSAPI PATTERN DATE: 30 May 2026
VSAPI OPR PATTERN File: 20.981.00
VSAPI OPR PATTERN Date: 31 May 2026

Step 1

Trend Micro Predictive Machine Learning detects and blocks malware at the first sign of its existence, before it executes on your system. When enabled, your Trend Micro product detects this malware under the following machine learning name:

    Troj.Win32.TRX.XXPE50FFF105

Step 2

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 3

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 4

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_CURRENT_USER\Software
    • {32-char hex machine ID}

Step 5

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.
  • %TEMP%\{9 random characters}.ocx
  • %APPDATA%\{host_process_image_name}

Step 6

Scan your computer with your Trend Micro product to delete files detected as Backdoor.MSIL.MULTIRAT.A. 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:

Step 7

Deleting Scheduled Tasks

The following {Task Name} - {Task to be run} listed should be used in the steps identified below:

  • Task Name: {host_process_image_name}
    Task to be run: -Execute %APPDATA%\{host_process_image_name}'

For Windows 2000, Windows XP, and Windows Server 2003:

  1. Open the Windows Scheduled Tasks. Click Start>Programs>Accessories>
    System Tools>Scheduled Tasks.
  2. Locate each {Task Name} values listed above in the Name column.
  3. Right-click on the said file(s) with the aforementioned value.
  4. Click on Properties. In the Run field, check for the listed {Task to be run}.
  5. If the strings match the list above, delete the task.

For Windows Vista, Windows 7, Windows Server 2008, Windows 8, Windows 8.1, and Windows Server 2012:

  1. Open the Windows Task Scheduler. To do this:
    • On Windows Vista, Windows 7, and Windows Server 2008, click Start, type taskschd.msc in the Search input field, then press Enter.
    • On Windows 8, Windows 8.1, and Windows Server 2012, right-click on the lower left corner of the screen, click Run, type taskschd.msc, then press Enter.
  2. In the left panel, click Task Scheduler Library.
  3. In the upper-middle panel, locate each {Task Name} values listed above in the Name column.
  4. In the lower-middle panel, click the Actions tab. In the Details column, check for the {Task to be run} string.
  5. If the said string is found, delete the task.


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