Analysis
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max time kernel
26s -
max time network
29s -
platform
windows11-21h2_x64 -
resource
win11-20240508-en -
resource tags
arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system -
submitted
11-06-2024 15:10
Static task
static1
Behavioral task
behavioral1
Sample
Themida64.exe
Resource
win11-20240508-en
8 signatures
150 seconds
General
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Target
Themida64.exe
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Size
30.5MB
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MD5
e0f0db8d1fd2c9a277f8e968977fa684
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SHA1
ae23b1e880bfade564e44759d01b965fda1f15d3
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SHA256
0486a1c12b05214b01ecf642e4c9c0159a767e507a4472cf8fda68deefe02786
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SHA512
347cd8dd2c4c5e9e84d111a8ecec77372e409aaa85c21f2c26ccca013467fad524d34c4ed6bc82386b5fa7eafe83531c0c81d63490b64e972cf68ce0001a1d9c
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SSDEEP
786432:zXLec7gEqw1qmSgjfXF6GCPKJn1pSRmnT:zCcQs5SgDX8GCPA1sRET
Score
9/10
Malware Config
Signatures
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Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
Processes:
Themida64.exedescription ioc process Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ Themida64.exe -
Checks BIOS information in registry 2 TTPs 3 IoCs
BIOS information is often read in order to detect sandboxing environments.
Processes:
Themida64.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion Themida64.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion Themida64.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate Themida64.exe -
Processes:
Themida64.exedescription ioc process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA Themida64.exe -
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.
Processes:
Themida64.exedescription ioc process File opened for modification \??\PhysicalDrive0 Themida64.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
Processes:
Themida64.exepid process 4560 Themida64.exe -
Modifies data under HKEY_USERS 15 IoCs
Processes:
LogonUI.exedescription ioc process Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1" LogonUI.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "235" LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4290799360" LogonUI.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89" LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1" LogonUI.exe Set value (data) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = 99ebff004cc2ff000091f8000078d4000067c000003e9200001a6800f7630c00 LogonUI.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292114432" LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365268" LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365268" LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10" LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History\AutoColor = "0" LogonUI.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292114432" LogonUI.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
Themida64.exepid process 4560 Themida64.exe 4560 Themida64.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
LogonUI.exepid process 788 LogonUI.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\Themida64.exe"C:\Users\Admin\AppData\Local\Temp\Themida64.exe"1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Writes to the Master Boot Record (MBR)
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
PID:4560
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C:\Windows\system32\LogonUI.exe"LogonUI.exe" /flags:0x4 /state0:0xa3a0e055 /state1:0x41c64e6d1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:788