Malware Analysis Report

2024-10-16 06:49

Sample ID 240616-fz7jzaveqq
Target avsat_antivirus.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 Overview

score
9/10

SHA256

60c57f14c2e0e0df0bda16646b21dddceaee0159dafbbb8daba310d4e1b5be6c

Threat Level: Likely malicious

The file avsat_antivirus.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 use of SetWindowsHookEx

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-16 05:19

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 05:19

Reported

2024-06-16 05:22

Platform

win10v2004-20240611-es

Max time kernel

150s

Max time network

152s

Command Line

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

Suspicious use of NtSetInformationThreadHideFromDebugger

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

Suspicious behavior: GetForegroundWindowSpam

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

Suspicious use of SetWindowsHookEx

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3256 wrote to memory of 2764 N/A C:\Users\Admin\AppData\Local\Temp\avsat_antivirus.exe C:\Windows\system32\cmd.exe
PID 3256 wrote to memory of 2764 N/A C:\Users\Admin\AppData\Local\Temp\avsat_antivirus.exe C:\Windows\system32\cmd.exe
PID 2764 wrote to memory of 2400 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\certutil.exe
PID 2764 wrote to memory of 2400 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\certutil.exe
PID 2764 wrote to memory of 2712 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\find.exe
PID 2764 wrote to memory of 2712 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\find.exe
PID 2764 wrote to memory of 3508 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\find.exe
PID 2764 wrote to memory of 3508 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\find.exe

Processes

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

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

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c certutil -hashfile "C:\Users\Admin\AppData\Local\Temp\avsat_antivirus.exe" MD5 | find /i /v "md5" | find /i /v "certutil"

C:\Windows\system32\certutil.exe

certutil -hashfile "C:\Users\Admin\AppData\Local\Temp\avsat_antivirus.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 73.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 144.107.17.2.in-addr.arpa udp
US 8.8.8.8:53 keyauth.win udp
US 172.67.72.57:443 keyauth.win tcp
US 8.8.8.8:53 x2.c.lencr.org udp
BE 23.55.97.11:80 x2.c.lencr.org tcp
US 8.8.8.8:53 57.72.67.172.in-addr.arpa udp
US 8.8.8.8:53 11.97.55.23.in-addr.arpa udp
N/A 127.0.0.1:64269 tcp
N/A 127.0.0.1:64271 tcp
US 172.67.72.57:443 keyauth.win tcp
N/A 127.0.0.1:64277 tcp
N/A 127.0.0.1:64279 tcp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 35.15.31.184.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 27.178.89.13.in-addr.arpa udp

Files

memory/3256-0-0x00007FF6D6350000-0x00007FF6D6DEF000-memory.dmp

memory/3256-1-0x00007FFBF1590000-0x00007FFBF1592000-memory.dmp

memory/3256-3-0x00007FF6D6350000-0x00007FF6D6DEF000-memory.dmp

memory/3256-2-0x00007FF6D6350000-0x00007FF6D6DEF000-memory.dmp

memory/3256-4-0x00007FF6D6350000-0x00007FF6D6DEF000-memory.dmp

memory/3256-7-0x00007FF6D6350000-0x00007FF6D6DEF000-memory.dmp

memory/3256-6-0x00007FF6D6350000-0x00007FF6D6DEF000-memory.dmp

memory/3256-5-0x00007FF6D6350000-0x00007FF6D6DEF000-memory.dmp

memory/3256-8-0x00007FF6D6350000-0x00007FF6D6DEF000-memory.dmp

memory/3256-9-0x00007FF6D6350000-0x00007FF6D6DEF000-memory.dmp

memory/3256-10-0x00007FF6D6350000-0x00007FF6D6DEF000-memory.dmp

memory/3256-11-0x00007FF6D6350000-0x00007FF6D6DEF000-memory.dmp

memory/3256-12-0x00007FF6D6350000-0x00007FF6D6DEF000-memory.dmp

memory/3256-13-0x00007FF6D6350000-0x00007FF6D6DEF000-memory.dmp