Malware Analysis Report

2025-03-14 23:27

Sample ID 240407-wykltaag71
Target e59039c56c654c71398eadadabf4404f_JaffaCakes118
SHA256 a41c1aa10cae622eedb44f9e0628a4205edb4229631efac00358e18e92a4ac96
Tags
evasion persistence trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

a41c1aa10cae622eedb44f9e0628a4205edb4229631efac00358e18e92a4ac96

Threat Level: Known bad

The file e59039c56c654c71398eadadabf4404f_JaffaCakes118 was found to be: Known bad.

Malicious Activity Summary

evasion persistence trojan

UAC bypass

Checks whether UAC is enabled

Adds Run key to start application

Suspicious use of SetThreadContext

Unsigned PE

Suspicious behavior: RenamesItself

System policy modification

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-07 18:19

Signatures

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-07 18:19

Reported

2024-04-07 18:22

Platform

win10v2004-20240226-en

Max time kernel

93s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe"

Signatures

UAC bypass

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0" C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\3666340 = "C:\\Users\\Public\\Music\\ff699e366\\ff699e366.exe" C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe N/A

Checks whether UAC is enabled

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe N/A

Suspicious behavior: RenamesItself

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4776 wrote to memory of 3656 N/A C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe
PID 4776 wrote to memory of 3656 N/A C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe
PID 4776 wrote to memory of 3656 N/A C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe
PID 4776 wrote to memory of 3656 N/A C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe
PID 4776 wrote to memory of 3656 N/A C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe
PID 4776 wrote to memory of 3656 N/A C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe
PID 4776 wrote to memory of 3656 N/A C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe
PID 4776 wrote to memory of 3656 N/A C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe

System policy modification

evasion
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0" C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe"

C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 241.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 133.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 17.143.109.104.in-addr.arpa udp
US 8.8.8.8:53 216.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp

Files

memory/3656-0-0x0000000000400000-0x000000000040C000-memory.dmp

memory/3656-1-0x0000000000400000-0x000000000040C000-memory.dmp

memory/3656-3-0x0000000000400000-0x000000000040C000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-07 18:19

Reported

2024-04-07 18:22

Platform

win7-20240221-en

Max time kernel

118s

Max time network

134s

Command Line

"C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe"

Signatures

UAC bypass

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0" C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\89d2ed7 = "C:\\Users\\Public\\Music\\abbcd489d\\abbcd489d.exe" C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe N/A

Checks whether UAC is enabled

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe N/A

Suspicious behavior: RenamesItself

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2488 wrote to memory of 2908 N/A C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe
PID 2488 wrote to memory of 2908 N/A C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe
PID 2488 wrote to memory of 2908 N/A C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe
PID 2488 wrote to memory of 2908 N/A C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe
PID 2488 wrote to memory of 2908 N/A C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe
PID 2488 wrote to memory of 2908 N/A C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe
PID 2488 wrote to memory of 2908 N/A C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe
PID 2488 wrote to memory of 2908 N/A C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe
PID 2488 wrote to memory of 2908 N/A C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe

System policy modification

evasion
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0" C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe"

C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\e59039c56c654c71398eadadabf4404f_JaffaCakes118.exe"

Network

N/A

Files

memory/2908-0-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2908-2-0x0000000000400000-0x000000000040C000-memory.dmp

memory/2908-5-0x0000000000400000-0x000000000040C000-memory.dmp

memory/2908-7-0x0000000000400000-0x000000000040C000-memory.dmp

memory/2908-9-0x0000000000400000-0x000000000040C000-memory.dmp

memory/2908-11-0x0000000000400000-0x000000000040C000-memory.dmp

memory/2908-13-0x0000000000400000-0x000000000040C000-memory.dmp