Malware Analysis Report

2024-10-10 08:02

Sample ID 240611-npsl3avgma
Target Loader.exe
SHA256 98191a1b44250b407896dae622506d8f4fc248f7d121aa83d4ece8e218bdcb13
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

98191a1b44250b407896dae622506d8f4fc248f7d121aa83d4ece8e218bdcb13

Threat Level: Likely malicious

The file Loader.exe was found to be: Likely malicious.

Malicious Activity Summary

themida evasion trojan

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

Checks BIOS information in registry

Themida packer

Checks whether UAC is enabled

Suspicious use of NtSetInformationThreadHideFromDebugger

Unsigned PE

Suspicious use of WriteProcessMemory

Suspicious use of SetWindowsHookEx

Delays execution with timeout.exe

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-11 11:34

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

2024-06-11 11:34

Reported

2024-06-11 11:37

Platform

win7-20240508-en

Max time kernel

121s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Loader.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\Loader.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\Loader.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\Users\Admin\AppData\Local\Temp\Loader.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

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\Loader.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Loader.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\Loader.exe

"C:\Users\Admin\AppData\Local\Temp\Loader.exe"

Network

N/A

Files

memory/2036-0-0x0000000140000000-0x0000000140B14000-memory.dmp

memory/2036-1-0x0000000076D30000-0x0000000076D32000-memory.dmp

memory/2036-2-0x0000000140000000-0x0000000140B14000-memory.dmp

memory/2036-3-0x0000000140000000-0x0000000140B14000-memory.dmp

memory/2036-4-0x0000000140000000-0x0000000140B14000-memory.dmp

memory/2036-6-0x0000000140000000-0x0000000140B14000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-11 11:34

Reported

2024-06-11 11:35

Platform

win10v2004-20240508-en

Max time kernel

24s

Max time network

27s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Loader.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\Loader.exe N/A

Checks BIOS information in registry

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

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Loader.exe N/A

Delays execution with timeout.exe

evasion
Description Indicator Process Target
N/A N/A C:\Windows\system32\timeout.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Loader.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\Loader.exe

"C:\Users\Admin\AppData\Local\Temp\Loader.exe"

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c certutil -hashfile "C:\Users\Admin\AppData\Local\Temp\Loader.exe" MD5 | find /i /v "md5" | find /i /v "certutil"

C:\Windows\system32\certutil.exe

certutil -hashfile "C:\Users\Admin\AppData\Local\Temp\Loader.exe" MD5

C:\Windows\system32\find.exe

find /i /v "md5"

C:\Windows\system32\find.exe

find /i /v "certutil"

C:\Windows\System32\rundll32.exe

C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c start cmd /C "color b && title Error && echo Couldn't resolve host name && timeout /t 5"

C:\Windows\system32\cmd.exe

cmd /C "color b && title Error && echo Couldn't resolve host name && timeout /t 5"

C:\Windows\system32\timeout.exe

timeout /t 5

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 keyauth.win udp
N/A 127.0.0.1:58115 tcp
N/A 127.0.0.1:58117 tcp

Files

memory/1448-0-0x0000000140000000-0x0000000140B14000-memory.dmp

memory/1448-2-0x00007FFD79E10000-0x00007FFD79E12000-memory.dmp

memory/1448-3-0x0000000140000000-0x0000000140B14000-memory.dmp

memory/1448-1-0x0000000140000000-0x0000000140B14000-memory.dmp

memory/1448-4-0x0000000140000000-0x0000000140B14000-memory.dmp

memory/1448-6-0x0000000140000000-0x0000000140B14000-memory.dmp

memory/1448-8-0x0000000140000000-0x0000000140B14000-memory.dmp