Malware Analysis Report

2025-06-16 03:39

Sample ID 240526-j3ym1sch97
Target 75e9740f86c60769a9b514bee85957a98e4e0127d64e60066be264b40e556f51
SHA256 75e9740f86c60769a9b514bee85957a98e4e0127d64e60066be264b40e556f51
Tags
bootkit evasion persistence 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

75e9740f86c60769a9b514bee85957a98e4e0127d64e60066be264b40e556f51

Threat Level: Likely malicious

The file 75e9740f86c60769a9b514bee85957a98e4e0127d64e60066be264b40e556f51 was found to be: Likely malicious.

Malicious Activity Summary

bootkit evasion persistence trojan

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

Checks BIOS information in registry

Identifies Wine through registry keys

Checks whether UAC is enabled

Writes to the Master Boot Record (MBR)

Suspicious use of NtSetInformationThreadHideFromDebugger

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-26 08:12

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-26 08:12

Reported

2024-05-26 08:14

Platform

win7-20240221-en

Max time kernel

143s

Max time network

126s

Command Line

"C:\Users\Admin\AppData\Local\Temp\75e9740f86c60769a9b514bee85957a98e4e0127d64e60066be264b40e556f51.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\75e9740f86c60769a9b514bee85957a98e4e0127d64e60066be264b40e556f51.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\75e9740f86c60769a9b514bee85957a98e4e0127d64e60066be264b40e556f51.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\Users\Admin\AppData\Local\Temp\75e9740f86c60769a9b514bee85957a98e4e0127d64e60066be264b40e556f51.exe N/A

Identifies Wine through registry keys

evasion
Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Wine C:\Users\Admin\AppData\Local\Temp\75e9740f86c60769a9b514bee85957a98e4e0127d64e60066be264b40e556f51.exe 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\75e9740f86c60769a9b514bee85957a98e4e0127d64e60066be264b40e556f51.exe N/A

Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PhysicalDrive0 C:\Users\Admin\AppData\Local\Temp\75e9740f86c60769a9b514bee85957a98e4e0127d64e60066be264b40e556f51.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\75e9740f86c60769a9b514bee85957a98e4e0127d64e60066be264b40e556f51.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\75e9740f86c60769a9b514bee85957a98e4e0127d64e60066be264b40e556f51.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\75e9740f86c60769a9b514bee85957a98e4e0127d64e60066be264b40e556f51.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\75e9740f86c60769a9b514bee85957a98e4e0127d64e60066be264b40e556f51.exe

"C:\Users\Admin\AppData\Local\Temp\75e9740f86c60769a9b514bee85957a98e4e0127d64e60066be264b40e556f51.exe"

Network

N/A

Files

memory/2248-0-0x0000000000400000-0x0000000001DE8000-memory.dmp

memory/2248-1-0x0000000076F00000-0x0000000076F01000-memory.dmp

memory/2248-4-0x0000000000400000-0x0000000001DE8000-memory.dmp

memory/2248-5-0x0000000000400000-0x0000000001DE8000-memory.dmp

memory/2248-6-0x0000000000400000-0x0000000001DE8000-memory.dmp

memory/2248-7-0x0000000000400000-0x0000000001DE8000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\pcsf.ini

MD5 681496ec06a1de0b86c016432b484d1c
SHA1 d7cd30308a7865424124b448638ab2701abacb11
SHA256 50ea92c083a43e75d9ddb9f578c18c146fe5202f208d1e3ee0c047c7b544dea8
SHA512 9626c2013693b6d8dc62a6c26115349f88085f3f90c1b8791d7ce52541fe2f62ccbfad56937d14f762d3960c5dca593f8aa7d6de04b102f5b41a638306d71de0

memory/2248-35-0x0000000000400000-0x0000000001DE8000-memory.dmp

memory/2248-36-0x0000000000400000-0x0000000001DE8000-memory.dmp

memory/2248-37-0x0000000000400000-0x0000000001DE8000-memory.dmp

memory/2248-38-0x0000000000400000-0x0000000001DE8000-memory.dmp

memory/2248-39-0x0000000000400000-0x0000000001DE8000-memory.dmp

memory/2248-40-0x0000000000400000-0x0000000001DE8000-memory.dmp

memory/2248-41-0x0000000000400000-0x0000000001DE8000-memory.dmp

memory/2248-42-0x0000000000400000-0x0000000001DE8000-memory.dmp

memory/2248-43-0x0000000000400000-0x0000000001DE8000-memory.dmp

memory/2248-44-0x0000000000400000-0x0000000001DE8000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-26 08:12

Reported

2024-05-26 08:14

Platform

win10v2004-20240426-en

Max time kernel

149s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\75e9740f86c60769a9b514bee85957a98e4e0127d64e60066be264b40e556f51.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\75e9740f86c60769a9b514bee85957a98e4e0127d64e60066be264b40e556f51.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\75e9740f86c60769a9b514bee85957a98e4e0127d64e60066be264b40e556f51.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\Users\Admin\AppData\Local\Temp\75e9740f86c60769a9b514bee85957a98e4e0127d64e60066be264b40e556f51.exe N/A

Identifies Wine through registry keys

evasion
Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\Software\Wine C:\Users\Admin\AppData\Local\Temp\75e9740f86c60769a9b514bee85957a98e4e0127d64e60066be264b40e556f51.exe 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\75e9740f86c60769a9b514bee85957a98e4e0127d64e60066be264b40e556f51.exe N/A

Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PhysicalDrive0 C:\Users\Admin\AppData\Local\Temp\75e9740f86c60769a9b514bee85957a98e4e0127d64e60066be264b40e556f51.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\75e9740f86c60769a9b514bee85957a98e4e0127d64e60066be264b40e556f51.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\75e9740f86c60769a9b514bee85957a98e4e0127d64e60066be264b40e556f51.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\75e9740f86c60769a9b514bee85957a98e4e0127d64e60066be264b40e556f51.exe

"C:\Users\Admin\AppData\Local\Temp\75e9740f86c60769a9b514bee85957a98e4e0127d64e60066be264b40e556f51.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 99.58.20.217.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 0.159.190.20.in-addr.arpa udp
NL 23.62.61.194:443 www.bing.com tcp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 194.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.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 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 82.90.14.23.in-addr.arpa udp
US 8.8.8.8:53 21.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 1.173.189.20.in-addr.arpa udp

Files

memory/3388-0-0x0000000000400000-0x0000000001DE8000-memory.dmp

memory/3388-3-0x0000000000400000-0x0000000001DE8000-memory.dmp

memory/3388-4-0x0000000000400000-0x0000000001DE8000-memory.dmp

memory/3388-5-0x0000000000400000-0x0000000001DE8000-memory.dmp

memory/3388-6-0x0000000000400000-0x0000000001DE8000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\pcsf.ini

MD5 681496ec06a1de0b86c016432b484d1c
SHA1 d7cd30308a7865424124b448638ab2701abacb11
SHA256 50ea92c083a43e75d9ddb9f578c18c146fe5202f208d1e3ee0c047c7b544dea8
SHA512 9626c2013693b6d8dc62a6c26115349f88085f3f90c1b8791d7ce52541fe2f62ccbfad56937d14f762d3960c5dca593f8aa7d6de04b102f5b41a638306d71de0

memory/3388-34-0x0000000000400000-0x0000000001DE8000-memory.dmp

memory/3388-35-0x0000000000400000-0x0000000001DE8000-memory.dmp

memory/3388-36-0x0000000000400000-0x0000000001DE8000-memory.dmp

memory/3388-37-0x0000000000400000-0x0000000001DE8000-memory.dmp

memory/3388-38-0x0000000000400000-0x0000000001DE8000-memory.dmp

memory/3388-39-0x0000000000400000-0x0000000001DE8000-memory.dmp

memory/3388-40-0x0000000000400000-0x0000000001DE8000-memory.dmp

memory/3388-41-0x0000000000400000-0x0000000001DE8000-memory.dmp

memory/3388-42-0x0000000000400000-0x0000000001DE8000-memory.dmp

memory/3388-43-0x0000000000400000-0x0000000001DE8000-memory.dmp