Malware Analysis Report

2025-08-05 23:04

Sample ID 240412-f3vpksag5t
Target ef398b61e90de340dab8751ab744624a_JaffaCakes118
SHA256 b91d9ef912d773a299cd29ebcf63da58dd98ef2e2c01bed0c0b178829dc0178f
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

b91d9ef912d773a299cd29ebcf63da58dd98ef2e2c01bed0c0b178829dc0178f

Threat Level: Likely malicious

The file ef398b61e90de340dab8751ab744624a_JaffaCakes118 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

Program crash

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-12 05:24

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

2024-04-12 05:24

Reported

2024-04-12 05:26

Platform

win7-20240221-en

Max time kernel

141s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ef398b61e90de340dab8751ab744624a_JaffaCakes118.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\ef398b61e90de340dab8751ab744624a_JaffaCakes118.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\ef398b61e90de340dab8751ab744624a_JaffaCakes118.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\Users\Admin\AppData\Local\Temp\ef398b61e90de340dab8751ab744624a_JaffaCakes118.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

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\ef398b61e90de340dab8751ab744624a_JaffaCakes118.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\ef398b61e90de340dab8751ab744624a_JaffaCakes118.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\ef398b61e90de340dab8751ab744624a_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\ef398b61e90de340dab8751ab744624a_JaffaCakes118.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2008 -s 572

Network

N/A

Files

memory/2008-0-0x0000000000210000-0x0000000000BFA000-memory.dmp

memory/2008-1-0x00000000758E0000-0x00000000759F0000-memory.dmp

memory/2008-4-0x00000000758E0000-0x00000000759F0000-memory.dmp

memory/2008-8-0x00000000758E0000-0x00000000759F0000-memory.dmp

memory/2008-9-0x00000000758E0000-0x00000000759F0000-memory.dmp

memory/2008-6-0x0000000075AB0000-0x0000000075AF7000-memory.dmp

memory/2008-10-0x0000000075AB0000-0x0000000075AF7000-memory.dmp

memory/2008-11-0x00000000758E0000-0x00000000759F0000-memory.dmp

memory/2008-12-0x00000000758E0000-0x00000000759F0000-memory.dmp

memory/2008-14-0x00000000758E0000-0x00000000759F0000-memory.dmp

memory/2008-13-0x00000000758E0000-0x00000000759F0000-memory.dmp

memory/2008-15-0x00000000758E0000-0x00000000759F0000-memory.dmp

memory/2008-16-0x00000000758E0000-0x00000000759F0000-memory.dmp

memory/2008-17-0x0000000077DE0000-0x0000000077DE2000-memory.dmp

memory/2008-19-0x0000000000210000-0x0000000000BFA000-memory.dmp

memory/2008-18-0x0000000074DF0000-0x00000000754DE000-memory.dmp

memory/2008-20-0x0000000000210000-0x0000000000BFA000-memory.dmp

memory/2008-22-0x0000000000210000-0x0000000000BFA000-memory.dmp

memory/2008-24-0x00000000758E0000-0x00000000759F0000-memory.dmp

memory/2008-25-0x00000000758E0000-0x00000000759F0000-memory.dmp

memory/2008-26-0x0000000075AB0000-0x0000000075AF7000-memory.dmp

memory/2008-27-0x00000000758E0000-0x00000000759F0000-memory.dmp

memory/2008-28-0x00000000758E0000-0x00000000759F0000-memory.dmp

memory/2008-29-0x00000000758E0000-0x00000000759F0000-memory.dmp

memory/2008-30-0x00000000758E0000-0x00000000759F0000-memory.dmp

memory/2008-31-0x0000000074DF0000-0x00000000754DE000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-12 05:24

Reported

2024-04-12 05:26

Platform

win10v2004-20240226-en

Max time kernel

92s

Max time network

139s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ef398b61e90de340dab8751ab744624a_JaffaCakes118.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\ef398b61e90de340dab8751ab744624a_JaffaCakes118.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\ef398b61e90de340dab8751ab744624a_JaffaCakes118.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion C:\Users\Admin\AppData\Local\Temp\ef398b61e90de340dab8751ab744624a_JaffaCakes118.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

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\ef398b61e90de340dab8751ab744624a_JaffaCakes118.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\ef398b61e90de340dab8751ab744624a_JaffaCakes118.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\ef398b61e90de340dab8751ab744624a_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\ef398b61e90de340dab8751ab744624a_JaffaCakes118.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 2396 -ip 2396

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2396 -s 932

Network

Country Destination Domain Proto
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 23.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 240.197.17.2.in-addr.arpa udp

Files

memory/2396-0-0x0000000000100000-0x0000000000AEA000-memory.dmp

memory/2396-1-0x0000000075A90000-0x0000000075B80000-memory.dmp

memory/2396-2-0x0000000075A90000-0x0000000075B80000-memory.dmp

memory/2396-3-0x0000000075A90000-0x0000000075B80000-memory.dmp

memory/2396-4-0x0000000075A90000-0x0000000075B80000-memory.dmp

memory/2396-5-0x0000000076F44000-0x0000000076F46000-memory.dmp

memory/2396-6-0x0000000075A90000-0x0000000075B80000-memory.dmp

memory/2396-7-0x0000000075A90000-0x0000000075B80000-memory.dmp

memory/2396-11-0x0000000000100000-0x0000000000AEA000-memory.dmp

memory/2396-12-0x0000000000100000-0x0000000000AEA000-memory.dmp

memory/2396-13-0x0000000005A20000-0x0000000005FC4000-memory.dmp

memory/2396-14-0x0000000005510000-0x00000000055A2000-memory.dmp

memory/2396-16-0x0000000000100000-0x0000000000AEA000-memory.dmp

memory/2396-17-0x0000000075A90000-0x0000000075B80000-memory.dmp