Malware Analysis Report

2024-10-10 07:59

Sample ID 240612-n2fs2atejb
Target d786bc9b3f5cd17ad0dfff3d375253316b2f90554bb985c96efe83ec6dfd8da5
SHA256 d786bc9b3f5cd17ad0dfff3d375253316b2f90554bb985c96efe83ec6dfd8da5
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

d786bc9b3f5cd17ad0dfff3d375253316b2f90554bb985c96efe83ec6dfd8da5

Threat Level: Likely malicious

The file d786bc9b3f5cd17ad0dfff3d375253316b2f90554bb985c96efe83ec6dfd8da5 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

Program crash

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-12 11:53

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

2024-06-12 11:53

Reported

2024-06-12 11:55

Platform

win7-20240611-en

Max time kernel

142s

Max time network

127s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\d786bc9b3f5cd17ad0dfff3d375253316b2f90554bb985c96efe83ec6dfd8da5.dll,#1

Signatures

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
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:\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

Program crash

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

Suspicious behavior: EnumeratesProcesses

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

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\d786bc9b3f5cd17ad0dfff3d375253316b2f90554bb985c96efe83ec6dfd8da5.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\d786bc9b3f5cd17ad0dfff3d375253316b2f90554bb985c96efe83ec6dfd8da5.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2096 -s 228

Network

N/A

Files

memory/2096-0-0x0000000074C80000-0x00000000752AC000-memory.dmp

memory/2096-1-0x0000000074650000-0x0000000074C7C000-memory.dmp

memory/2096-2-0x0000000074C80000-0x00000000752AC000-memory.dmp

memory/2096-3-0x0000000074650000-0x0000000074C7C000-memory.dmp

memory/2096-6-0x0000000077DC0000-0x0000000077DC2000-memory.dmp

memory/2096-5-0x0000000074650000-0x0000000074C7C000-memory.dmp

memory/2096-4-0x0000000074650000-0x0000000074C7C000-memory.dmp

memory/2096-7-0x0000000074650000-0x0000000074C7C000-memory.dmp

memory/2096-8-0x0000000074650000-0x0000000074C7C000-memory.dmp

memory/2096-9-0x0000000074650000-0x0000000074C7C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-12 11:53

Reported

2024-06-12 11:55

Platform

win10v2004-20240611-en

Max time kernel

125s

Max time network

127s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\d786bc9b3f5cd17ad0dfff3d375253316b2f90554bb985c96efe83ec6dfd8da5.dll,#1

Signatures

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
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:\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

Program crash

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

Suspicious behavior: EnumeratesProcesses

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2712 wrote to memory of 3316 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2712 wrote to memory of 3316 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2712 wrote to memory of 3316 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\d786bc9b3f5cd17ad0dfff3d375253316b2f90554bb985c96efe83ec6dfd8da5.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\d786bc9b3f5cd17ad0dfff3d375253316b2f90554bb985c96efe83ec6dfd8da5.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3316 -ip 3316

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3316 -s 632

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4252,i,2113996974559895641,18156918660790954073,262144 --variations-seed-version --mojo-platform-channel-handle=4084 /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 131.253.33.237:443 g.bing.com tcp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 67.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 237.33.253.131.in-addr.arpa udp
NL 23.62.61.72:443 www.bing.com tcp
US 8.8.8.8:53 72.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 11.173.189.20.in-addr.arpa udp

Files

memory/3316-0-0x00000000744D0000-0x0000000074AFC000-memory.dmp

memory/3316-1-0x0000000077094000-0x0000000077096000-memory.dmp

memory/3316-2-0x00000000744D0000-0x0000000074AFC000-memory.dmp

memory/3316-3-0x00000000744D0000-0x0000000074AFC000-memory.dmp

memory/3316-5-0x00000000744D0000-0x0000000074AFC000-memory.dmp

memory/3316-4-0x00000000744D0000-0x0000000074AFC000-memory.dmp

memory/3316-6-0x00000000744D0000-0x0000000074AFC000-memory.dmp