Malware Analysis Report

2024-10-10 07:59

Sample ID 240611-19bv9stgje
Target 5b21fd17d73e30d2cf5c8dcdae598402f34a1b5fde2be32d231f7ed5f59c209f
SHA256 5b21fd17d73e30d2cf5c8dcdae598402f34a1b5fde2be32d231f7ed5f59c209f
Tags
themida evasion trojan
score
10/10

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
10/10

SHA256

5b21fd17d73e30d2cf5c8dcdae598402f34a1b5fde2be32d231f7ed5f59c209f

Threat Level: Known bad

The file 5b21fd17d73e30d2cf5c8dcdae598402f34a1b5fde2be32d231f7ed5f59c209f was found to be: Known bad.

Malicious Activity Summary

themida evasion trojan

Detects executables packed with Themida

Detects executables packed with Themida

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

Program crash

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-11 22:20

Signatures

Detects executables packed with Themida

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

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

2024-06-11 22:20

Reported

2024-06-11 22:23

Platform

win7-20240220-en

Max time kernel

122s

Max time network

124s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\5b21fd17d73e30d2cf5c8dcdae598402f34a1b5fde2be32d231f7ed5f59c209f.dll,#1

Signatures

Detects executables packed with Themida

Description Indicator Process Target
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Identifies VirtualBox via ACPI registry values (likely anti-VM)

evasion
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ C:\Windows\SysWOW64\rundll32.exe N/A

Checks BIOS information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion C:\Windows\SysWOW64\rundll32.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\Windows\SysWOW64\rundll32.exe N/A

Themida packer

themida
Description Indicator Process Target
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Checks whether UAC is enabled

evasion trojan
Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2728 wrote to memory of 2732 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2728 wrote to memory of 2732 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2728 wrote to memory of 2732 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2728 wrote to memory of 2732 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2728 wrote to memory of 2732 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2728 wrote to memory of 2732 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2728 wrote to memory of 2732 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\5b21fd17d73e30d2cf5c8dcdae598402f34a1b5fde2be32d231f7ed5f59c209f.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\5b21fd17d73e30d2cf5c8dcdae598402f34a1b5fde2be32d231f7ed5f59c209f.dll,#1

Network

N/A

Files

memory/2732-0-0x00000000774C0000-0x00000000774C2000-memory.dmp

memory/2732-3-0x0000000072950000-0x00000000738B4000-memory.dmp

memory/2732-5-0x0000000072950000-0x00000000738B4000-memory.dmp

memory/2732-6-0x0000000072950000-0x00000000738B4000-memory.dmp

memory/2732-7-0x0000000072950000-0x00000000738B4000-memory.dmp

memory/2732-4-0x0000000072950000-0x00000000738B4000-memory.dmp

memory/2732-2-0x0000000072950000-0x00000000738B4000-memory.dmp

memory/2732-1-0x0000000072950000-0x00000000738B4000-memory.dmp

memory/2732-9-0x000000006ECF0000-0x000000006ED00000-memory.dmp

memory/2732-10-0x0000000076D04000-0x0000000076D05000-memory.dmp

memory/2732-8-0x0000000072950000-0x00000000738B4000-memory.dmp

memory/2732-11-0x0000000072950000-0x00000000738B4000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-11 22:20

Reported

2024-06-11 22:23

Platform

win10v2004-20240611-en

Max time kernel

134s

Max time network

136s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\5b21fd17d73e30d2cf5c8dcdae598402f34a1b5fde2be32d231f7ed5f59c209f.dll,#1

Signatures

Detects executables packed with Themida

Description Indicator Process Target
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Identifies VirtualBox via ACPI registry values (likely anti-VM)

evasion
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ C:\Windows\SysWOW64\rundll32.exe N/A

Checks BIOS information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion C:\Windows\SysWOW64\rundll32.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\Windows\SysWOW64\rundll32.exe N/A

Themida packer

themida
Description Indicator Process Target
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Checks whether UAC is enabled

evasion trojan
Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3264 wrote to memory of 1528 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3264 wrote to memory of 1528 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3264 wrote to memory of 1528 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\5b21fd17d73e30d2cf5c8dcdae598402f34a1b5fde2be32d231f7ed5f59c209f.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\5b21fd17d73e30d2cf5c8dcdae598402f34a1b5fde2be32d231f7ed5f59c209f.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1528 -ip 1528

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1528 -s 604

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 512 -p 1528 -ip 1528

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1528 -s 612

Network

Country Destination Domain Proto
US 8.8.8.8:53 67.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 138.107.17.2.in-addr.arpa udp
US 8.8.8.8:53 6.173.189.20.in-addr.arpa udp

Files

memory/1528-0-0x00000000779B4000-0x00000000779B6000-memory.dmp

memory/1528-2-0x00000000744B0000-0x0000000075414000-memory.dmp

memory/1528-1-0x00000000744B0000-0x0000000075414000-memory.dmp

memory/1528-4-0x00000000744B0000-0x0000000075414000-memory.dmp

memory/1528-9-0x000000006E340000-0x000000006E350000-memory.dmp

memory/1528-5-0x00000000744B0000-0x0000000075414000-memory.dmp

memory/1528-3-0x00000000744B0000-0x0000000075414000-memory.dmp

memory/1528-7-0x00000000744B0000-0x0000000075414000-memory.dmp

memory/1528-6-0x00000000744B0000-0x0000000075414000-memory.dmp

memory/1528-8-0x00000000744B0000-0x0000000075414000-memory.dmp

memory/1528-10-0x00000000744B0000-0x0000000075414000-memory.dmp