Analysis
- max time kernel
150s - max time network
145s - platform
windows10-ltsc_2021_x64 - resource
win10ltsc2021-20260911-en - resource tags
- submitted
24/10/2026, 16:51
General
- Target loader.exe
- Size 18.0MB
- Sample261024-vc8wvafc92
- SHA256 dbba5a1c22ca73fd9d5fa53d358f76a50b91f2ebd0d01fa81eaddd74268f079d
Score
7/10
Malware Config
Signatures
- Executes dropped EXE 1 IoCs
- Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Using powershell.exe command.
- Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
- Suspicious use of NtCreateThreadExHideFromDebugger 1 TTPs 1 IoCs
- Direct Volume Access: Opens a physical disk for reading 1 TTPs 24 IoCs
Opens a raw handle to a physical disk, which bypasses file system access controls and is used for disk inspection, anti-VM checks and privilege checks.
- 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.
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 1 IoCs
- Suspicious behavior: RenamesItself 1 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 3 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\loader.exe"C:\Users\Admin\AppData\Local\Temp\loader.exe"1⤵
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
- Suspicious behavior: RenamesItself
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\loader.exe"C:\Users\Admin\AppData\Local\Temp\loader.exe"2⤵
- Executes dropped EXE
- Writes to the Master Boot Record (MBR)
- Direct Volume Access: Opens a physical disk for reading
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /c powershell.exe -NoProfile -ExecutionPolicy Bypass -Command ^"^& { $encoded = 'QXBwIGluaXRpYWxpemF0aW9uIGVycm9yIDB4MTAz'; $text = [System.Text.Encoding]::UTF8.GetString([Convert]::FromBase64String($encoded)); $text = $text.Replace('\n', [Environment]::NewLine); Add-Type -AssemblyName PresentationFramework; [System.Windows.MessageBox]::Show($text, 'sync.top', 'OK', 'Error', 'None', 'DefaultDesktopOnly') }^"3⤵
- Executes a command shell one-liner
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell.exe -NoProfile -ExecutionPolicy Bypass -Command "& { $encoded = 'QXBwIGluaXRpYWxpemF0aW9uIGVycm9yIDB4MTAz'; $text = [System.Text.Encoding]::UTF8.GetString([Convert]::FromBase64String($encoded)); $text = $text.Replace('\n', [Environment]::NewLine); Add-Type -AssemblyName PresentationFramework; [System.Windows.MessageBox]::Show($text, 'sync.top', 'OK', 'Error', 'None', 'DefaultDesktopOnly') }"4⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
__PSScriptPolicyTest_hig1bw2o.t3b.ps1
loader.exe
memory/2428-0-0x00007FF7F9600000-0x00007FF7FB7EB000-memory.dmp
memory/2428-8-0x00007FF7F9600000-0x00007FF7FB7EB000-memory.dmp
memory/3280-11-0x00007FF623D60000-0x00007FF625F4B000-memory.dmp
memory/3280-26-0x00007FF623D60000-0x00007FF625F4B000-memory.dmp
memory/4988-23-0x0000014459F50000-0x0000014459F72000-memory.dmp