Malware Analysis Report

2024-10-10 07:59

Sample ID 240612-n8wg3atgnb
Target 9d3822fcb1cad069aa8a63b2984db74da3f6f070387b3726af48fe621ddc9870
SHA256 9d3822fcb1cad069aa8a63b2984db74da3f6f070387b3726af48fe621ddc9870
Tags
themida evasion 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

9d3822fcb1cad069aa8a63b2984db74da3f6f070387b3726af48fe621ddc9870

Threat Level: Likely malicious

The file 9d3822fcb1cad069aa8a63b2984db74da3f6f070387b3726af48fe621ddc9870 was found to be: Likely malicious.

Malicious Activity Summary

themida evasion trojan

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

Themida packer

Checks BIOS information in registry

Checks whether UAC is enabled

Suspicious use of NtSetInformationThreadHideFromDebugger

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-12 12:04

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

2024-06-12 12:04

Reported

2024-06-12 12:07

Platform

win7-20240508-en

Max time kernel

117s

Max time network

118s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\9d3822fcb1cad069aa8a63b2984db74da3f6f070387b3726af48fe621ddc9870.dll,#1

Signatures

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

evasion
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ C:\Windows\SysWOW64\rundll32.exe N/A

Checks BIOS information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion C:\Windows\SysWOW64\rundll32.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\Windows\SysWOW64\rundll32.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

Checks whether UAC is enabled

evasion trojan
Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1672 wrote to memory of 1084 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1672 wrote to memory of 1084 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1672 wrote to memory of 1084 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1672 wrote to memory of 1084 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1672 wrote to memory of 1084 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1672 wrote to memory of 1084 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1672 wrote to memory of 1084 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\9d3822fcb1cad069aa8a63b2984db74da3f6f070387b3726af48fe621ddc9870.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\9d3822fcb1cad069aa8a63b2984db74da3f6f070387b3726af48fe621ddc9870.dll,#1

Network

N/A

Files

memory/1084-0-0x0000000074BF0000-0x0000000075164000-memory.dmp

memory/1084-1-0x0000000074670000-0x0000000074BE4000-memory.dmp

memory/1084-3-0x0000000074670000-0x0000000074BE4000-memory.dmp

memory/1084-2-0x0000000074BF0000-0x0000000075164000-memory.dmp

memory/1084-4-0x0000000077B00000-0x0000000077B02000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-12 12:04

Reported

2024-06-12 12:07

Platform

win10v2004-20240508-en

Max time kernel

51s

Max time network

52s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\9d3822fcb1cad069aa8a63b2984db74da3f6f070387b3726af48fe621ddc9870.dll,#1

Signatures

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

evasion
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ C:\Windows\SysWOW64\rundll32.exe N/A

Checks BIOS information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion C:\Windows\SysWOW64\rundll32.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\Windows\SysWOW64\rundll32.exe N/A

Themida packer

themida
Description Indicator Process Target
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:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2512 wrote to memory of 4040 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2512 wrote to memory of 4040 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2512 wrote to memory of 4040 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\9d3822fcb1cad069aa8a63b2984db74da3f6f070387b3726af48fe621ddc9870.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\9d3822fcb1cad069aa8a63b2984db74da3f6f070387b3726af48fe621ddc9870.dll,#1

Network

Files

memory/4040-0-0x0000000074EA0000-0x0000000075414000-memory.dmp

memory/4040-1-0x00000000779B4000-0x00000000779B6000-memory.dmp