Malware Analysis Report

2024-10-16 06:50

Sample ID 240616-d15ewsxgke
Target loader.exe
SHA256 60c57f14c2e0e0df0bda16646b21dddceaee0159dafbbb8daba310d4e1b5be6c
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

60c57f14c2e0e0df0bda16646b21dddceaee0159dafbbb8daba310d4e1b5be6c

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 behavior: GetForegroundWindowSpam

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-16 03:29

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

2024-06-16 03:29

Reported

2024-06-16 03:32

Platform

win7-20240611-en

Max time kernel

150s

Max time network

118s

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
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

Suspicious behavior: GetForegroundWindowSpam

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

Network

Country Destination Domain Proto
N/A 127.0.0.1:49212 tcp
N/A 127.0.0.1:49214 tcp
US 8.8.8.8:53 keyauth.win udp
US 172.67.72.57:443 keyauth.win tcp
US 8.8.8.8:53 apps.identrust.com udp
BE 2.17.107.226:80 apps.identrust.com tcp
US 8.8.8.8:53 x2.c.lencr.org udp
BE 23.55.97.11:80 x2.c.lencr.org tcp

Files

memory/2372-0-0x000000013FCD0000-0x000000014076F000-memory.dmp

memory/2372-1-0x00000000774C0000-0x00000000774C2000-memory.dmp

memory/2372-2-0x000000013FCD0000-0x000000014076F000-memory.dmp

memory/2372-3-0x000000013FCD0000-0x000000014076F000-memory.dmp

memory/2372-4-0x000000013FCD0000-0x000000014076F000-memory.dmp

memory/2372-7-0x000000013FCD0000-0x000000014076F000-memory.dmp

memory/2372-8-0x000000013FCD0000-0x000000014076F000-memory.dmp

memory/2372-6-0x000000013FCD0000-0x000000014076F000-memory.dmp

memory/2372-5-0x000000013FCD0000-0x000000014076F000-memory.dmp

memory/2372-17-0x000000013FCD0000-0x000000014076F000-memory.dmp

memory/2372-19-0x000000013FCD0000-0x000000014076F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-16 03:29

Reported

2024-06-16 03:32

Platform

win10v2004-20240508-en

Max time kernel

147s

Max time network

151s

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
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

Suspicious behavior: GetForegroundWindowSpam

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2560 wrote to memory of 1892 N/A C:\Users\Admin\AppData\Local\Temp\loader.exe C:\Windows\system32\cmd.exe
PID 2560 wrote to memory of 1892 N/A C:\Users\Admin\AppData\Local\Temp\loader.exe C:\Windows\system32\cmd.exe
PID 1892 wrote to memory of 3308 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\certutil.exe
PID 1892 wrote to memory of 3308 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\certutil.exe
PID 1892 wrote to memory of 376 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\find.exe
PID 1892 wrote to memory of 376 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\find.exe
PID 1892 wrote to memory of 2156 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\find.exe
PID 1892 wrote to memory of 2156 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\find.exe

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"

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 127.0.0.1:60521 tcp
N/A 127.0.0.1:60523 tcp

Files

memory/2560-1-0x00007FFD182D0000-0x00007FFD182D2000-memory.dmp

memory/2560-0-0x00007FF79CC40000-0x00007FF79D6DF000-memory.dmp

memory/2560-3-0x00007FF79CC40000-0x00007FF79D6DF000-memory.dmp

memory/2560-4-0x00007FF79CC40000-0x00007FF79D6DF000-memory.dmp

memory/2560-2-0x00007FF79CC40000-0x00007FF79D6DF000-memory.dmp

memory/2560-7-0x00007FF79CC40000-0x00007FF79D6DF000-memory.dmp

memory/2560-6-0x00007FF79CC40000-0x00007FF79D6DF000-memory.dmp

memory/2560-5-0x00007FF79CC40000-0x00007FF79D6DF000-memory.dmp

memory/2560-8-0x00007FF79CC40000-0x00007FF79D6DF000-memory.dmp

memory/2560-9-0x00007FF79CC40000-0x00007FF79D6DF000-memory.dmp

memory/2560-11-0x00007FF79CC40000-0x00007FF79D6DF000-memory.dmp