Malware Analysis Report

2024-10-16 07:01

Sample ID 240610-fy2x4ace61
Target nyxia external.exe
SHA256 19bddef132af20da74c89fb263b1ae89f9762eba06382e69cccdfc9048e45917
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

19bddef132af20da74c89fb263b1ae89f9762eba06382e69cccdfc9048e45917

Threat Level: Likely malicious

The file nyxia external.exe 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

2024-06-10 05:20

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

2024-06-10 05:17

Reported

2024-06-10 05:28

Platform

win7-20240221-en

Max time kernel

140s

Max time network

123s

Command Line

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

Suspicious use of NtSetInformationThreadHideFromDebugger

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

Suspicious behavior: EnumeratesProcesses

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1800 wrote to memory of 1720 N/A C:\Users\Admin\AppData\Local\Temp\nyxia external.exe C:\Windows\system32\WerFault.exe
PID 1800 wrote to memory of 1720 N/A C:\Users\Admin\AppData\Local\Temp\nyxia external.exe C:\Windows\system32\WerFault.exe
PID 1800 wrote to memory of 1720 N/A C:\Users\Admin\AppData\Local\Temp\nyxia external.exe C:\Windows\system32\WerFault.exe

Processes

C:\Users\Admin\AppData\Local\Temp\nyxia external.exe

"C:\Users\Admin\AppData\Local\Temp\nyxia external.exe"

C:\Windows\system32\WerFault.exe

C:\Windows\system32\WerFault.exe -u -p 1800 -s 196

Network

N/A

Files

memory/1800-1-0x0000000077490000-0x0000000077492000-memory.dmp

memory/1800-0-0x000000013F980000-0x0000000140281000-memory.dmp

memory/1800-4-0x000000013F980000-0x0000000140281000-memory.dmp

memory/1800-5-0x000000013F980000-0x0000000140281000-memory.dmp

memory/1800-3-0x000000013F980000-0x0000000140281000-memory.dmp

memory/1800-2-0x000000013F980000-0x0000000140281000-memory.dmp

memory/1800-6-0x000000013F980000-0x0000000140281000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-10 05:17

Reported

2024-06-10 05:27

Platform

win10v2004-20240508-en

Max time kernel

149s

Max time network

149s

Command Line

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

Suspicious use of NtSetInformationThreadHideFromDebugger

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

Suspicious behavior: EnumeratesProcesses

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

Processes

C:\Users\Admin\AppData\Local\Temp\nyxia external.exe

"C:\Users\Admin\AppData\Local\Temp\nyxia external.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 133.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 udp

Files

memory/3988-0-0x00007FF62B1F0000-0x00007FF62BAF1000-memory.dmp

memory/3988-1-0x00007FFB73570000-0x00007FFB73572000-memory.dmp

memory/3988-3-0x00007FF62B1F0000-0x00007FF62BAF1000-memory.dmp

memory/3988-2-0x00007FF62B1F0000-0x00007FF62BAF1000-memory.dmp

memory/3988-4-0x00007FF62B1F0000-0x00007FF62BAF1000-memory.dmp

memory/3988-5-0x00007FF62B1F0000-0x00007FF62BAF1000-memory.dmp

memory/3988-6-0x00007FF62B1F0000-0x00007FF62BAF1000-memory.dmp