Malware Analysis Report

2025-08-05 15:35

Sample ID 241031-x6j6pa1lcv
Target nkt_loader.exe
SHA256 de7ebab6e655913a5606ed9c516e45a0c4b351a09de7625a0c446e509750b07b
Tags
themida discovery 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 Overview

score
9/10

SHA256

de7ebab6e655913a5606ed9c516e45a0c4b351a09de7625a0c446e509750b07b

Threat Level: Likely malicious

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

Malicious Activity Summary

themida discovery 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

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-31 19:27

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

2024-10-31 19:27

Reported

2024-10-31 19:28

Platform

win10ltsc2021-20241023-en

Max time kernel

4s

Max time network

5s

Command Line

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

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\nkt_loader.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

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

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\nkt_loader.exe N/A

Suspicious behavior: EnumeratesProcesses

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

Processes

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 134.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp

Files

memory/680-0-0x0000000000400000-0x0000000000ACB000-memory.dmp

memory/680-1-0x0000000077055000-0x0000000077057000-memory.dmp

memory/680-2-0x0000000000400000-0x0000000000ACB000-memory.dmp

memory/680-3-0x0000000000400000-0x0000000000ACB000-memory.dmp