Malware Analysis Report

2024-10-10 07:50

Sample ID 240615-zfybqsxdjj
Target 33be823a25ae6c524b5aa5b9ecb6fbd4.exe
SHA256 378c74969556a08c8f86802c97eb5803dea97606d2c48a035fa8f79a19eb3deb
Tags
themida bootkit evasion persistence trojan
score
9/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
9/10

SHA256

378c74969556a08c8f86802c97eb5803dea97606d2c48a035fa8f79a19eb3deb

Threat Level: Likely malicious

The file 33be823a25ae6c524b5aa5b9ecb6fbd4.exe was found to be: Likely malicious.

Malicious Activity Summary

themida bootkit evasion persistence trojan

Identifies VirtualBox via ACPI registry values (likely anti-VM)

Themida packer

Checks BIOS information in registry

Writes to the Master Boot Record (MBR)

Checks whether UAC is enabled

Unsigned PE

Checks SCSI registry key(s)

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-15 20:40

Signatures

Themida packer

themida
Description Indicator Process Target
N/A N/A N/A N/A

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-15 20:40

Reported

2024-06-15 20:42

Platform

win10v2004-20240611-en

Max time kernel

149s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\33be823a25ae6c524b5aa5b9ecb6fbd4.exe"

Signatures

Identifies VirtualBox via ACPI registry values (likely anti-VM)

evasion
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ C:\Users\Admin\AppData\Local\Temp\33be823a25ae6c524b5aa5b9ecb6fbd4.exe N/A

Checks BIOS information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion C:\Users\Admin\AppData\Local\Temp\33be823a25ae6c524b5aa5b9ecb6fbd4.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\Users\Admin\AppData\Local\Temp\33be823a25ae6c524b5aa5b9ecb6fbd4.exe N/A

Themida packer

themida
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Checks whether UAC is enabled

evasion trojan
Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA C:\Users\Admin\AppData\Local\Temp\33be823a25ae6c524b5aa5b9ecb6fbd4.exe N/A

Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PhysicalDrive0 C:\Users\Admin\AppData\Local\Temp\33be823a25ae6c524b5aa5b9ecb6fbd4.exe N/A

Checks SCSI registry key(s)

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_Msft&Prod_Virtual_DVD-ROM\2&1f4adffe&0&000001\HardwareID C:\Users\Admin\AppData\Local\Temp\33be823a25ae6c524b5aa5b9ecb6fbd4.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_Msft&Prod_Virtual_DVD-ROM\2&1f4adffe&0&000002\Properties\{540b947e-8b40-45bc-a8a2-6a0b894cbda2}\0004 C:\Users\Admin\AppData\Local\Temp\33be823a25ae6c524b5aa5b9ecb6fbd4.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_QEMU&Prod_QEMU_DVD-ROM\4&215468a5&0&010000 C:\Users\Admin\AppData\Local\Temp\33be823a25ae6c524b5aa5b9ecb6fbd4.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_Msft&Prod_Virtual_DVD-ROM\2&1f4adffe&0&000001\Properties\{540b947e-8b40-45bc-a8a2-6a0b894cbda2}\0004 C:\Users\Admin\AppData\Local\Temp\33be823a25ae6c524b5aa5b9ecb6fbd4.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000 C:\Users\Admin\AppData\Local\Temp\33be823a25ae6c524b5aa5b9ecb6fbd4.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_QEMU&Prod_QEMU_DVD-ROM\4&215468a5&0&010000\Properties\{540b947e-8b40-45bc-a8a2-6a0b894cbda2}\0004 C:\Users\Admin\AppData\Local\Temp\33be823a25ae6c524b5aa5b9ecb6fbd4.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_Msft&Prod_Virtual_DVD-ROM\2&1f4adffe&0&000002 C:\Users\Admin\AppData\Local\Temp\33be823a25ae6c524b5aa5b9ecb6fbd4.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_Msft&Prod_Virtual_DVD-ROM\2&1f4adffe&0&000002\Properties\{540b947e-8b40-45bc-a8a2-6a0b894cbda2}\0004\ C:\Users\Admin\AppData\Local\Temp\33be823a25ae6c524b5aa5b9ecb6fbd4.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_Msft&Prod_Virtual_DVD-ROM\2&1f4adffe&0&000002\HardwareID C:\Users\Admin\AppData\Local\Temp\33be823a25ae6c524b5aa5b9ecb6fbd4.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\Properties\{540b947e-8b40-45bc-a8a2-6a0b894cbda2}\0004 C:\Users\Admin\AppData\Local\Temp\33be823a25ae6c524b5aa5b9ecb6fbd4.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\HardwareID C:\Users\Admin\AppData\Local\Temp\33be823a25ae6c524b5aa5b9ecb6fbd4.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_Msft&Prod_Virtual_DVD-ROM\2&1f4adffe&0&000001 C:\Users\Admin\AppData\Local\Temp\33be823a25ae6c524b5aa5b9ecb6fbd4.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_QEMU&Prod_QEMU_DVD-ROM\4&215468a5&0&010000\Properties\{540b947e-8b40-45bc-a8a2-6a0b894cbda2}\0004\ C:\Users\Admin\AppData\Local\Temp\33be823a25ae6c524b5aa5b9ecb6fbd4.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_QEMU&Prod_QEMU_DVD-ROM\4&215468a5&0&010000\HardwareID C:\Users\Admin\AppData\Local\Temp\33be823a25ae6c524b5aa5b9ecb6fbd4.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\Properties\{540b947e-8b40-45bc-a8a2-6a0b894cbda2}\0004\ C:\Users\Admin\AppData\Local\Temp\33be823a25ae6c524b5aa5b9ecb6fbd4.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_Msft&Prod_Virtual_DVD-ROM\2&1f4adffe&0&000001\Properties\{540b947e-8b40-45bc-a8a2-6a0b894cbda2}\0004\ C:\Users\Admin\AppData\Local\Temp\33be823a25ae6c524b5aa5b9ecb6fbd4.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\33be823a25ae6c524b5aa5b9ecb6fbd4.exe

"C:\Users\Admin\AppData\Local\Temp\33be823a25ae6c524b5aa5b9ecb6fbd4.exe"

Network

Country Destination Domain Proto
DE 51.195.116.69:6666 tcp
US 8.8.8.8:53 69.116.195.51.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
BE 88.221.83.194:443 www.bing.com tcp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 71.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 105.83.221.88.in-addr.arpa udp
US 8.8.8.8:53 194.83.221.88.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 21.121.18.2.in-addr.arpa udp
US 8.8.8.8:53 221.131.50.23.in-addr.arpa udp
US 8.8.8.8:53 3.173.189.20.in-addr.arpa udp

Files

memory/4828-2-0x0000000140000000-0x0000000143618000-memory.dmp

memory/4828-0-0x0000000140000000-0x0000000143618000-memory.dmp

memory/4828-1-0x0000000140000000-0x0000000143618000-memory.dmp

memory/4828-3-0x0000000140000000-0x0000000143618000-memory.dmp

memory/4828-4-0x0000000140000000-0x0000000143618000-memory.dmp

memory/4828-17-0x0000000140000000-0x0000000143618000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-15 20:40

Reported

2024-06-15 20:43

Platform

win11-20240508-en

Max time kernel

131s

Max time network

143s

Command Line

"C:\Users\Admin\AppData\Local\Temp\33be823a25ae6c524b5aa5b9ecb6fbd4.exe"

Signatures

Identifies VirtualBox via ACPI registry values (likely anti-VM)

evasion
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ C:\Users\Admin\AppData\Local\Temp\33be823a25ae6c524b5aa5b9ecb6fbd4.exe N/A

Checks BIOS information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion C:\Users\Admin\AppData\Local\Temp\33be823a25ae6c524b5aa5b9ecb6fbd4.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\Users\Admin\AppData\Local\Temp\33be823a25ae6c524b5aa5b9ecb6fbd4.exe N/A

Themida packer

themida
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Checks whether UAC is enabled

evasion trojan
Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA C:\Users\Admin\AppData\Local\Temp\33be823a25ae6c524b5aa5b9ecb6fbd4.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\33be823a25ae6c524b5aa5b9ecb6fbd4.exe

"C:\Users\Admin\AppData\Local\Temp\33be823a25ae6c524b5aa5b9ecb6fbd4.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp

Files

memory/3692-2-0x0000000140000000-0x0000000143618000-memory.dmp

memory/3692-0-0x0000000140000000-0x0000000143618000-memory.dmp

memory/3692-3-0x0000000140000000-0x0000000143618000-memory.dmp

memory/3692-1-0x0000000140000000-0x0000000143618000-memory.dmp

memory/3692-4-0x0000000140000000-0x0000000143618000-memory.dmp

memory/3692-6-0x0000000140000000-0x0000000143618000-memory.dmp

memory/3692-7-0x0000000140000000-0x0000000143618000-memory.dmp

memory/3692-8-0x0000000140000000-0x0000000143618000-memory.dmp