Malware Analysis Report

2025-08-05 23:04

Sample ID 240412-fv482sfe45
Target ef350462b8c62a703ae3b5c57f441e2f_JaffaCakes118
SHA256 c1bab9fd442d74ab78de0e8654aab95c5779f610d2fe82cac2f11de7741a7c62
Tags
upx 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

c1bab9fd442d74ab78de0e8654aab95c5779f610d2fe82cac2f11de7741a7c62

Threat Level: Likely malicious

The file ef350462b8c62a703ae3b5c57f441e2f_JaffaCakes118 was found to be: Likely malicious.

Malicious Activity Summary

upx themida evasion trojan

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

Checks BIOS information in registry

Themida packer

UPX packed file

Checks whether UAC is enabled

Unsigned PE

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-12 05:12

Signatures

Themida packer

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

UPX packed file

upx
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
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-12 05:12

Reported

2024-04-12 05:15

Platform

win7-20240221-en

Max time kernel

151s

Max time network

127s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ef350462b8c62a703ae3b5c57f441e2f_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\ef350462b8c62a703ae3b5c57f441e2f_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\ef350462b8c62a703ae3b5c57f441e2f_JaffaCakes118.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\Users\Admin\AppData\Local\Temp\ef350462b8c62a703ae3b5c57f441e2f_JaffaCakes118.exe N/A

UPX packed file

upx
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

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\ef350462b8c62a703ae3b5c57f441e2f_JaffaCakes118.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\ef350462b8c62a703ae3b5c57f441e2f_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\ef350462b8c62a703ae3b5c57f441e2f_JaffaCakes118.exe"

Network

N/A

Files

memory/3052-0-0x0000000000400000-0x0000000000C88000-memory.dmp

memory/3052-1-0x0000000000400000-0x0000000000C88000-memory.dmp

memory/3052-2-0x0000000000400000-0x0000000000C88000-memory.dmp

memory/3052-5-0x0000000000400000-0x0000000000C88000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-12 05:12

Reported

2024-04-12 05:15

Platform

win10v2004-20240226-en

Max time kernel

147s

Max time network

155s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ef350462b8c62a703ae3b5c57f441e2f_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\ef350462b8c62a703ae3b5c57f441e2f_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\ef350462b8c62a703ae3b5c57f441e2f_JaffaCakes118.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\Users\Admin\AppData\Local\Temp\ef350462b8c62a703ae3b5c57f441e2f_JaffaCakes118.exe N/A

UPX packed file

upx
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\ef350462b8c62a703ae3b5c57f441e2f_JaffaCakes118.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\ef350462b8c62a703ae3b5c57f441e2f_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\ef350462b8c62a703ae3b5c57f441e2f_JaffaCakes118.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 22.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 249.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 3.173.189.20.in-addr.arpa udp

Files

memory/1740-0-0x0000000000400000-0x0000000000C88000-memory.dmp

memory/1740-1-0x0000000000400000-0x0000000000C88000-memory.dmp

memory/1740-2-0x0000000000400000-0x0000000000C88000-memory.dmp