Malware Analysis Report

2024-10-19 10:47

Sample ID 240620-j3y9js1hnl
Target 044476a3ae480a2a5408f7a2b7f64282_JaffaCakes118
SHA256 afd11ce544197fdb0c89320eca95fe753ea649d4d3cb2d5f69db9e7814b9fb76
Tags
adware stealer
score
7/10

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
7/10

SHA256

afd11ce544197fdb0c89320eca95fe753ea649d4d3cb2d5f69db9e7814b9fb76

Threat Level: Shows suspicious behavior

The file 044476a3ae480a2a5408f7a2b7f64282_JaffaCakes118 was found to be: Shows suspicious behavior.

Malicious Activity Summary

adware stealer

Loads dropped DLL

Installs/modifies Browser Helper Object

Drops file in System32 directory

Unsigned PE

Modifies registry class

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-20 08:12

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-20 08:12

Reported

2024-06-20 08:14

Platform

win7-20240508-en

Max time kernel

119s

Max time network

119s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\044476a3ae480a2a5408f7a2b7f64282_JaffaCakes118.dll,#1

Signatures

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1924 wrote to memory of 1932 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1924 wrote to memory of 1932 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1924 wrote to memory of 1932 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1924 wrote to memory of 1932 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1924 wrote to memory of 1932 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1924 wrote to memory of 1932 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1924 wrote to memory of 1932 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\044476a3ae480a2a5408f7a2b7f64282_JaffaCakes118.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\044476a3ae480a2a5408f7a2b7f64282_JaffaCakes118.dll,#1

Network

N/A

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-20 08:12

Reported

2024-06-20 08:14

Platform

win10v2004-20240508-en

Max time kernel

51s

Max time network

51s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\044476a3ae480a2a5408f7a2b7f64282_JaffaCakes118.dll,#1

Signatures

Loads dropped DLL

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

Installs/modifies Browser Helper Object

stealer adware
Description Indicator Process Target
Key deleted \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{31D09BA0-12F5-4CCE-BE8A-2923E76605DA} C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{e0511f0c-2a38-41d9-8dca-e8c00f1b98ae} C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{e0511f0c-2a38-41d9-8dca-e8c00f1b98ae}\ = "{ea89b1f0-0c8e-acd8-9d14-83a2c0f1150e}" C:\Windows\SysWOW64\rundll32.exe N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{1FD49718-1D00-4B19-AF5F-070AF6D5D54C} C:\Windows\SysWOW64\rundll32.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\jlijat.dll C:\Windows\SysWOW64\rundll32.exe N/A
File opened for modification C:\Windows\SysWOW64\jlijat.dll C:\Windows\SysWOW64\rundll32.exe N/A

Modifies registry class

Description Indicator Process Target
Key deleted \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1FD49718-1D00-4B19-AF5F-070AF6D5D54C}\TypeLib C:\Windows\SysWOW64\rundll32.exe N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{31D09BA0-12F5-4CCE-BE8A-2923E76605DA}\VersionIndependentProgID C:\Windows\SysWOW64\rundll32.exe N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{31D09BA0-12F5-4CCE-BE8A-2923E76605DA}\Version C:\Windows\SysWOW64\rundll32.exe N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{31D09BA0-12F5-4CCE-BE8A-2923E76605DA}\TypeLib C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{e0511f0c-2a38-41d9-8dca-e8c00f1b98ae}\InprocServer32\ = "C:\\Windows\\SysWow64\\jlijat.dll" C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{e0511f0c-2a38-41d9-8dca-e8c00f1b98ae}\InprocServer32\ThreadingModel = "free" C:\Windows\SysWOW64\rundll32.exe N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1FD49718-1D00-4B19-AF5F-070AF6D5D54C}\InprocServer32 C:\Windows\SysWOW64\rundll32.exe N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1FD49718-1D00-4B19-AF5F-070AF6D5D54C} C:\Windows\SysWOW64\rundll32.exe N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{31D09BA0-12F5-4CCE-BE8A-2923E76605DA}\ProgID C:\Windows\SysWOW64\rundll32.exe N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{31D09BA0-12F5-4CCE-BE8A-2923E76605DA}\Implemented Categories C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{e0511f0c-2a38-41d9-8dca-e8c00f1b98ae}\InprocServer32 C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID C:\Windows\SysWOW64\rundll32.exe N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{31D09BA0-12F5-4CCE-BE8A-2923E76605DA} C:\Windows\SysWOW64\rundll32.exe N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1FD49718-1D00-4B19-AF5F-070AF6D5D54C}\VersionIndependentProgID C:\Windows\SysWOW64\rundll32.exe N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1FD49718-1D00-4B19-AF5F-070AF6D5D54C}\ProgID C:\Windows\SysWOW64\rundll32.exe N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1FD49718-1D00-4B19-AF5F-070AF6D5D54C}\Implemented Categories\{59FB2056-D625-48D0-A944-1A85B5AB2640} C:\Windows\SysWOW64\rundll32.exe N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1FD49718-1D00-4B19-AF5F-070AF6D5D54C}\Implemented Categories C:\Windows\SysWOW64\rundll32.exe N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{31D09BA0-12F5-4CCE-BE8A-2923E76605DA}\Programmable C:\Windows\SysWOW64\rundll32.exe N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{31D09BA0-12F5-4CCE-BE8A-2923E76605DA}\InprocServer32 C:\Windows\SysWOW64\rundll32.exe N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{31D09BA0-12F5-4CCE-BE8A-2923E76605DA}\Implemented Categories\{59FB2056-D625-48D0-A944-1A85B5AB2640} C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{e0511f0c-2a38-41d9-8dca-e8c00f1b98ae} C:\Windows\SysWOW64\rundll32.exe N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1FD49718-1D00-4B19-AF5F-070AF6D5D54C}\Programmable C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2460 wrote to memory of 5116 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2460 wrote to memory of 5116 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2460 wrote to memory of 5116 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 5116 wrote to memory of 2068 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 5116 wrote to memory of 2068 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 5116 wrote to memory of 2068 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\044476a3ae480a2a5408f7a2b7f64282_JaffaCakes118.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\044476a3ae480a2a5408f7a2b7f64282_JaffaCakes118.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe "C:\Windows\system32\jlijat.dll",i

Network

Files

memory/5116-1-0x0000000010000000-0x0000000010035000-memory.dmp

memory/5116-0-0x0000000010000000-0x0000000010035000-memory.dmp

C:\Windows\SysWOW64\jlijat.dll

MD5 044476a3ae480a2a5408f7a2b7f64282
SHA1 6d9d80314566a580f251413c99cca55f3efd79e7
SHA256 afd11ce544197fdb0c89320eca95fe753ea649d4d3cb2d5f69db9e7814b9fb76
SHA512 de00f978d120a9fb4f903a21679d8dc1c59c3b0e15478b454beacf931f404f80ab286d17bd0b8405b67fb01b092fa7f8787d9f4b7ea1c97ee77f2c87c6f8386a

memory/2068-6-0x0000000010000000-0x0000000010035000-memory.dmp

memory/2068-5-0x0000000010000000-0x0000000010035000-memory.dmp