Analysis
- user interaction
yes - max time kernel
149s - max time network
94s - platform
windows11-21h2_x64 - resource
win11-20260130-en - resource tags
- submitted
25/04/2026, 10:33
General
- Target VoiceBoost.exe
- Size 375KB
- Sample260425-mlq4dsft51
- SHA256 1fa1ca42abac4f9bb826940e36893d4e6e2612a6cc314c490e593b2834027082
Malware Config
Signatures
- Family: Umbral
Umbral stealer is an open-source modular stealer written in C#.
- Detects Umbral payload 1 IoCs
- Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs
Using powershell.exe command.
- Disables one or more Microsoft Defender components 1 TTPs 1 IoCs
Uses the Powershell Set-MpPreference cmdlet to disable one or more Microsoft Defender components.
- Drops file in Drivers directory 1 IoCs
- Disables automatic submission of suspicious files to Microsoft by Windows Defender 1 TTPs 1 IoCs
Uses the Powershell Set-MpPreference cmdlet to prevent Windows Defender from automatically sending files to Microsoft for analysis.
- Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Suspicious behavior: EnumeratesProcesses 8 IoCs
- Suspicious use of AdjustPrivilegeToken 5 IoCs
- Suspicious use of WriteProcessMemory 5 IoCs
- Views/modifies file attributes 1 TTPs 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\VoiceBoost.exe"C:\Users\Admin\AppData\Local\Temp\VoiceBoost.exe"1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\attrib.exe"attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\VoiceBoost.exe"2⤵
- Views/modifies file attributes
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\VoiceBoost.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" Set-MpPreference -DisableIntrusionPreventionSystem $true -DisableIOAVProtection $true -DisableRealtimeMonitoring $true -DisableScriptScanning $true -EnableControlledFolderAccess Disabled -EnableNetworkProtection AuditMode -Force -MAPSReporting Disabled -SubmitSamplesConsent NeverSend && powershell Set-MpPreference -SubmitSamplesConsent 22⤵
- Command and Scripting Interpreter: PowerShell
- Disables one or more Microsoft Defender components
- Disables automatic submission of suspicious files to Microsoft by Windows Defender
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY2⤵
- 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" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
powershell.exe.log
StartupProfileData-NonInteractive
StartupProfileData-NonInteractive
StartupProfileData-NonInteractive
__PSScriptPolicyTest_kqztiq43.sbb.ps1
memory/668-68-0x0000019B62C70000-0x0000019B62C82000-memory.dmp
memory/668-67-0x0000019B4A5D0000-0x0000019B4A5DC000-memory.dmp
memory/2476-20-0x00000188D0D80000-0x00000188D0E33000-memory.dmp
memory/2476-27-0x00000188D10E0000-0x00000188D10EA000-memory.dmp
memory/2476-3-0x00000188D0B30000-0x00000188D0B40000-memory.dmp
memory/2476-21-0x00000188D0D50000-0x00000188D0D5A000-memory.dmp
memory/2476-22-0x00000188D0FB0000-0x00000188D0FCC000-memory.dmp
memory/2476-23-0x00000188D0F90000-0x00000188D0F9A000-memory.dmp
memory/2476-24-0x00000188D10F0000-0x00000188D110A000-memory.dmp
memory/2476-25-0x00000188D0FA0000-0x00000188D0FA8000-memory.dmp
memory/2476-26-0x00000188D10D0000-0x00000188D10D6000-memory.dmp
memory/2476-5-0x00000188B8520000-0x00000188B8542000-memory.dmp
memory/2476-28-0x00000188D0B30000-0x00000188D0B40000-memory.dmp
memory/2476-31-0x00000188B83A0000-0x00000188B83AC000-memory.dmp
memory/2476-32-0x00000188B8440000-0x00000188B8452000-memory.dmp
memory/2476-12-0x00007FF4E88B0000-0x00007FF4E88C0000-memory.dmp
memory/2476-11-0x00000188D0B30000-0x00000188D0B40000-memory.dmp
memory/2476-2-0x00000188D0B30000-0x00000188D0B40000-memory.dmp
memory/2476-19-0x00000188D0D60000-0x00000188D0D7C000-memory.dmp
memory/3740-57-0x0000018C76F60000-0x0000018C76F6C000-memory.dmp
memory/3740-58-0x0000018C770E0000-0x0000018C770F2000-memory.dmp
memory/4540-42-0x00000238E6240000-0x00000238E624C000-memory.dmp
memory/4540-43-0x00000238E6420000-0x00000238E6432000-memory.dmp
memory/4868-0-0x000001D2D52D0000-0x000001D2D5334000-memory.dmp
memory/4868-46-0x000001D2EFB00000-0x000001D2EFB76000-memory.dmp
memory/4868-48-0x000001D2EFA80000-0x000001D2EFA9E000-memory.dmp
memory/4868-47-0x000001D2EFAB0000-0x000001D2EFB00000-memory.dmp
memory/4868-1-0x000001D2EF790000-0x000001D2EF7A0000-memory.dmp
memory/4868-70-0x000001D2EFB90000-0x000001D2EFB9A000-memory.dmp
memory/4868-71-0x000001D2EFBC0000-0x000001D2EFBD2000-memory.dmp
memory/4868-74-0x000001D2EF790000-0x000001D2EF7A0000-memory.dmp
memory/4868-75-0x000001D2D5760000-0x000001D2D576C000-memory.dmp
memory/4868-76-0x000001D2EFA40000-0x000001D2EFA52000-memory.dmp