Malware Analysis Report

2025-04-13 22:09

Sample ID 240825-lvfhkszdkj
Target c07a3945ff704403d394bcfb82299ebe_JaffaCakes118
SHA256 00b67c86ca4b05702c7bb0369bf51ce8df3f3ed444ba41b4870c61496ac0bc9a
Tags
discovery persistence privilege_escalation
score
8/10

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
8/10

SHA256

00b67c86ca4b05702c7bb0369bf51ce8df3f3ed444ba41b4870c61496ac0bc9a

Threat Level: Likely malicious

The file c07a3945ff704403d394bcfb82299ebe_JaffaCakes118 was found to be: Likely malicious.

Malicious Activity Summary

discovery persistence privilege_escalation

Event Triggered Execution: AppInit DLLs

Drops file in System32 directory

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious use of SetWindowsHookEx

Suspicious use of AdjustPrivilegeToken

Modifies data under HKEY_USERS

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-25 09:50

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-25 09:50

Reported

2024-08-25 09:51

Platform

win7-20240729-en

Max time kernel

2s

Max time network

2s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c07a3945ff704403d394bcfb82299ebe_JaffaCakes118.exe"

Signatures

Event Triggered Execution: AppInit DLLs

persistence privilege_escalation

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\kwkfyah.dll C:\Users\Admin\AppData\Local\Temp\c07a3945ff704403d394bcfb82299ebe_JaffaCakes118.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\c07a3945ff704403d394bcfb82299ebe_JaffaCakes118.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeShutdownPrivilege N/A C:\Users\Admin\AppData\Local\Temp\c07a3945ff704403d394bcfb82299ebe_JaffaCakes118.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\c07a3945ff704403d394bcfb82299ebe_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\c07a3945ff704403d394bcfb82299ebe_JaffaCakes118.exe"

C:\Windows\system32\LogonUI.exe

"LogonUI.exe" /flags:0x0

C:\Windows\system32\LogonUI.exe

"LogonUI.exe" /flags:0x1

Network

N/A

Files

memory/2848-7-0x0000000002AB0000-0x0000000002AB1000-memory.dmp

memory/2776-6-0x0000000002E10000-0x0000000002E11000-memory.dmp

memory/2128-3-0x0000000001000000-0x0000000001019000-memory.dmp

memory/2128-2-0x0000000001000000-0x0000000001019000-memory.dmp

memory/2128-1-0x0000000001000000-0x0000000001019000-memory.dmp

memory/2128-0-0x0000000001001000-0x0000000001002000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-25 09:50

Reported

2024-08-25 09:51

Platform

win10v2004-20240802-en

Max time kernel

2s

Max time network

8s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c07a3945ff704403d394bcfb82299ebe_JaffaCakes118.exe"

Signatures

Event Triggered Execution: AppInit DLLs

persistence privilege_escalation

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\ynyrubj.dll C:\Users\Admin\AppData\Local\Temp\c07a3945ff704403d394bcfb82299ebe_JaffaCakes118.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\c07a3945ff704403d394bcfb82299ebe_JaffaCakes118.exe N/A

Modifies data under HKEY_USERS

Description Indicator Process Target
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365271" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365271" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1" C:\Windows\system32\LogonUI.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292311040" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292311040" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "66" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1" C:\Windows\system32\LogonUI.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History\AutoColor = "0" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4288567808" C:\Windows\system32\LogonUI.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM C:\Windows\system32\LogonUI.exe N/A
Set value (data) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = a6d8ff0076b9ed00429ce3000078d700005a9e000042750000264200f7630c00 C:\Windows\system32\LogonUI.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeShutdownPrivilege N/A C:\Users\Admin\AppData\Local\Temp\c07a3945ff704403d394bcfb82299ebe_JaffaCakes118.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\system32\LogonUI.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\c07a3945ff704403d394bcfb82299ebe_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\c07a3945ff704403d394bcfb82299ebe_JaffaCakes118.exe"

C:\Windows\system32\LogonUI.exe

"LogonUI.exe" /flags:0x4 /state0:0xa3977055 /state1:0x41c64e6d

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp

Files

memory/4820-0-0x0000000001001000-0x0000000001002000-memory.dmp

memory/4820-1-0x0000000001000000-0x0000000001019000-memory.dmp

memory/4820-2-0x0000000001000000-0x0000000001019000-memory.dmp

memory/4820-3-0x0000000001000000-0x0000000001019000-memory.dmp