Malware Analysis Report

2024-10-10 08:10

Sample ID 240610-wxhe3awcqn
Target Loader.exe
SHA256 29e1a7d0ae4f700212bd0395e9fb511af08fbef9c1bf35aa9e77c6f2ab931b14
Tags
evasion execution persistence themida 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

29e1a7d0ae4f700212bd0395e9fb511af08fbef9c1bf35aa9e77c6f2ab931b14

Threat Level: Likely malicious

The file Loader.exe was found to be: Likely malicious.

Malicious Activity Summary

evasion execution persistence themida trojan

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

Creates new service(s)

Drops file in Drivers directory

Themida packer

Checks computer location settings

Checks BIOS information in registry

Checks whether UAC is enabled

Suspicious use of NtSetInformationThreadHideFromDebugger

Drops file in System32 directory

Drops file in Windows directory

Launches sc.exe

Unsigned PE

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

Suspicious behavior: LoadsDriver

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-10 18:17

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 18:17

Reported

2024-06-10 18:18

Platform

win10v2004-20240426-en

Max time kernel

14s

Max time network

17s

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

Creates new service(s)

persistence execution

Drops file in Drivers directory

Description Indicator Process Target
File created C:\Windows\System32\drivers\winhb.sys 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

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation 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

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

Drops file in System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\System32\config\RegBack\{69CD1F2D-DF68-4E23-9108-1B70783F2444} C:\Users\Admin\AppData\Local\Temp\Loader.exe N/A
File opened for modification C:\Windows\System32\config\RegBack\{69CD1F2D-DF68-4E23-9108-1B70783F2879} C:\Users\Admin\AppData\Local\Temp\Loader.exe N/A
File opened for modification C:\Windows\System32\config\RegBack\{69CD1F2D-DF68-4E23-9108-1B70783F2859} C:\Users\Admin\AppData\Local\Temp\Loader.exe N/A
File opened for modification C:\Windows\System32\config\RegBack\{69CD1F2D-DF68-4E23-9108-1B70783F2869} C:\Users\Admin\AppData\Local\Temp\Loader.exe N/A
File opened for modification C:\Windows\System32\IME\IMETC\{69CD1F2D-DF68-4E23-9108-1B70783F2879} C:\Users\Admin\AppData\Local\Temp\Loader.exe N/A
File opened for modification C:\Windows\System32\config\RegBack\{69CD1F2D-DF68-4E23-9108-1B70783F2899} 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

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\schemas\Provisioning\{69CD1F2D-DF68-4E23-9108-1B70783F2892} C:\Users\Admin\AppData\Local\Temp\Loader.exe N/A
File opened for modification C:\Windows\schemas\Provisioning\{69CD1F2D-DF68-4E23-9108-1B70783F2859} C:\Users\Admin\AppData\Local\Temp\Loader.exe N/A
File opened for modification C:\Windows\schemas\Provisioning\{69CD1F2D-DF68-4E23-9108-UPDATE} C:\Users\Admin\AppData\Local\Temp\Loader.exe N/A
File opened for modification C:\Windows\schemas\Provisioning\{69CD1F2D-DF68-4E23-9108-1B70783F2893} C:\Users\Admin\AppData\Local\Temp\Loader.exe N/A

Launches sc.exe

Description Indicator Process Target
N/A N/A C:\Windows\system32\sc.exe N/A
N/A N/A C:\Windows\system32\sc.exe N/A
N/A N/A C:\Windows\system32\sc.exe N/A
N/A N/A C:\Windows\system32\sc.exe N/A

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

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

Suspicious behavior: LoadsDriver

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3944 wrote to memory of 3336 N/A C:\Users\Admin\AppData\Local\Temp\Loader.exe C:\Windows\System32\cmd.exe
PID 3944 wrote to memory of 3336 N/A C:\Users\Admin\AppData\Local\Temp\Loader.exe C:\Windows\System32\cmd.exe
PID 3336 wrote to memory of 1496 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\sc.exe
PID 3336 wrote to memory of 1496 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\sc.exe
PID 3944 wrote to memory of 1752 N/A C:\Users\Admin\AppData\Local\Temp\Loader.exe C:\Windows\System32\cmd.exe
PID 3944 wrote to memory of 1752 N/A C:\Users\Admin\AppData\Local\Temp\Loader.exe C:\Windows\System32\cmd.exe
PID 1752 wrote to memory of 2736 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\sc.exe
PID 1752 wrote to memory of 2736 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\sc.exe
PID 3944 wrote to memory of 4452 N/A C:\Users\Admin\AppData\Local\Temp\Loader.exe C:\Windows\System32\cmd.exe
PID 3944 wrote to memory of 4452 N/A C:\Users\Admin\AppData\Local\Temp\Loader.exe C:\Windows\System32\cmd.exe
PID 3944 wrote to memory of 1664 N/A C:\Users\Admin\AppData\Local\Temp\Loader.exe C:\Windows\System32\cmd.exe
PID 3944 wrote to memory of 1664 N/A C:\Users\Admin\AppData\Local\Temp\Loader.exe C:\Windows\System32\cmd.exe
PID 3944 wrote to memory of 1504 N/A C:\Users\Admin\AppData\Local\Temp\Loader.exe C:\Windows\system32\cmd.exe
PID 3944 wrote to memory of 1504 N/A C:\Users\Admin\AppData\Local\Temp\Loader.exe C:\Windows\system32\cmd.exe
PID 4452 wrote to memory of 2080 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\sc.exe
PID 4452 wrote to memory of 2080 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\sc.exe
PID 1504 wrote to memory of 2204 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\certutil.exe
PID 1504 wrote to memory of 2204 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\certutil.exe
PID 1504 wrote to memory of 400 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\find.exe
PID 1504 wrote to memory of 400 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\find.exe
PID 1504 wrote to memory of 4492 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\find.exe
PID 1504 wrote to memory of 4492 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\find.exe
PID 1664 wrote to memory of 432 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\sc.exe
PID 1664 wrote to memory of 432 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\sc.exe
PID 3944 wrote to memory of 3236 N/A C:\Users\Admin\AppData\Local\Temp\Loader.exe C:\Windows\system32\cmd.exe
PID 3944 wrote to memory of 3236 N/A C:\Users\Admin\AppData\Local\Temp\Loader.exe C:\Windows\system32\cmd.exe
PID 3944 wrote to memory of 3592 N/A C:\Users\Admin\AppData\Local\Temp\Loader.exe C:\Windows\system32\cmd.exe
PID 3944 wrote to memory of 3592 N/A C:\Users\Admin\AppData\Local\Temp\Loader.exe C:\Windows\system32\cmd.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 sc create windowsproc type=kernel binpath=C:\Windows\System32\drivers\winhb.sys

C:\Windows\system32\sc.exe

sc create windowsproc type=kernel binpath=C:\Windows\System32\drivers\winhb.sys

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /C sc start windowsproc

C:\Windows\system32\sc.exe

sc start windowsproc

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /C sc create windowsproc type=kernel binpath=C:\Windows\System32\drivers\winhb.sys

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /C sc start windowsproc

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\sc.exe

sc create windowsproc type=kernel binpath=C:\Windows\System32\drivers\winhb.sys

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"

C:\Windows\system32\sc.exe

sc start windowsproc

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c cls

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c cls

Network

Country Destination Domain Proto
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 138.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 download.simpletoolz.fun udp
US 104.21.14.14:443 download.simpletoolz.fun tcp
US 8.8.8.8:53 14.14.21.104.in-addr.arpa udp
US 8.8.8.8:53 67.169.217.172.in-addr.arpa udp
US 8.8.8.8:53 keyauth.win udp
US 104.26.1.5:443 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 5.1.26.104.in-addr.arpa udp
US 8.8.8.8:53 11.97.55.23.in-addr.arpa udp
N/A 127.0.0.1:64241 tcp
N/A 127.0.0.1:64243 tcp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp

Files

memory/3944-0-0x0000000140000000-0x00000001425AE000-memory.dmp

memory/3944-1-0x0000000140000000-0x00000001425AE000-memory.dmp

memory/3944-2-0x0000000140000000-0x00000001425AE000-memory.dmp

memory/3944-3-0x0000000140000000-0x00000001425AE000-memory.dmp

memory/3944-4-0x00007FF906B10000-0x00007FF906B12000-memory.dmp

memory/3944-15-0x0000000140000000-0x00000001425AE000-memory.dmp

memory/3944-16-0x0000000140000000-0x00000001425AE000-memory.dmp