Malware Analysis Report

2024-10-16 07:00

Sample ID 240609-pq936sbc38
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)

Checks BIOS information in registry

Themida packer

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

2024-06-09 12:33

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

2024-06-09 12:33

Reported

2024-06-09 12:38

Platform

win7-20240508-en

Max time kernel

140s

Max time network

122s

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 2976 wrote to memory of 1920 N/A C:\Users\Admin\AppData\Local\Temp\nyxia external.exe C:\Windows\system32\WerFault.exe
PID 2976 wrote to memory of 1920 N/A C:\Users\Admin\AppData\Local\Temp\nyxia external.exe C:\Windows\system32\WerFault.exe
PID 2976 wrote to memory of 1920 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 2976 -s 196

Network

N/A

Files

memory/2976-0-0x000000013F990000-0x0000000140291000-memory.dmp

memory/2976-1-0x0000000077980000-0x0000000077982000-memory.dmp

memory/2976-2-0x000000013F990000-0x0000000140291000-memory.dmp

memory/2976-3-0x000000013F990000-0x0000000140291000-memory.dmp

memory/2976-4-0x000000013F990000-0x0000000140291000-memory.dmp

memory/2976-5-0x000000013F990000-0x0000000140291000-memory.dmp

memory/2976-6-0x000000013F990000-0x0000000140291000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-09 12:33

Reported

2024-06-09 12:38

Platform

win10v2004-20240426-en

Max time kernel

94s

Max time network

129s

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 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 23.159.190.20.in-addr.arpa udp
US 20.231.121.79:80 tcp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 30.243.111.52.in-addr.arpa udp

Files

memory/2728-0-0x00007FF6214D0000-0x00007FF621DD1000-memory.dmp

memory/2728-1-0x00007FF86DAD0000-0x00007FF86DAD2000-memory.dmp

memory/2728-2-0x00007FF6214D0000-0x00007FF621DD1000-memory.dmp

memory/2728-3-0x00007FF6214D0000-0x00007FF621DD1000-memory.dmp

memory/2728-4-0x00007FF6214D0000-0x00007FF621DD1000-memory.dmp

memory/2728-5-0x00007FF6214D0000-0x00007FF621DD1000-memory.dmp

memory/2728-6-0x00007FF6214D0000-0x00007FF621DD1000-memory.dmp