Malware Analysis Report

2025-01-18 21:37

Sample ID 240415-nvz84ade66
Target f0f9d394d608be66b3b4f56efaba3bca_JaffaCakes118
SHA256 e76c76ad77f213e3fce30713053ffaea7fcbef19cf2b4f32a405751edf74e1ed
Tags
adware stealer
score
6/10

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
6/10

SHA256

e76c76ad77f213e3fce30713053ffaea7fcbef19cf2b4f32a405751edf74e1ed

Threat Level: Shows suspicious behavior

The file f0f9d394d608be66b3b4f56efaba3bca_JaffaCakes118 was found to be: Shows suspicious behavior.

Malicious Activity Summary

adware stealer

Installs/modifies Browser Helper Object

Unsigned PE

Modifies registry class

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-15 11:43

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-15 11:43

Reported

2024-04-15 11:46

Platform

win7-20240221-en

Max time kernel

118s

Max time network

120s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\f0f9d394d608be66b3b4f56efaba3bca_JaffaCakes118.dll

Signatures

Installs/modifies Browser Helper Object

stealer adware
Description Indicator Process Target
Key created \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{CC01FC6C-5B28-9558-58EE-FEE16AD28C31} C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-5B28-9558-58EE-FEE16AD28C31}\InprocServer32 C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-5B28-9558-58EE-FEE16AD28C31}\InprocServer32\ThreadingModel = "Apartment" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\f0f9d394d608be66b3b4f56efaba3bca_JaffaCakes118.brm inc\Clsid\ = "{CC01FC6C-5B28-9558-58EE-FEE16AD28C31}" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-5B28-9558-58EE-FEE16AD28C31} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-5B28-9558-58EE-FEE16AD28C31}\ = "brm inc" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-5B28-9558-58EE-FEE16AD28C31}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\f0f9d394d608be66b3b4f56efaba3bca_JaffaCakes118.dll" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\f0f9d394d608be66b3b4f56efaba3bca_JaffaCakes118.brm inc C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\f0f9d394d608be66b3b4f56efaba3bca_JaffaCakes118.brm inc\ = "brm inc" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\f0f9d394d608be66b3b4f56efaba3bca_JaffaCakes118.brm inc\Clsid C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-5B28-9558-58EE-FEE16AD28C31}\ProgID C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-5B28-9558-58EE-FEE16AD28C31}\ProgID\ = "f0f9d394d608be66b3b4f56efaba3bca_JaffaCakes118.brm inc" C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1432 wrote to memory of 2348 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1432 wrote to memory of 2348 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1432 wrote to memory of 2348 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1432 wrote to memory of 2348 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1432 wrote to memory of 2348 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1432 wrote to memory of 2348 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1432 wrote to memory of 2348 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe

Processes

C:\Windows\system32\regsvr32.exe

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\f0f9d394d608be66b3b4f56efaba3bca_JaffaCakes118.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\f0f9d394d608be66b3b4f56efaba3bca_JaffaCakes118.dll

Network

N/A

Files

memory/2348-0-0x0000000001EB0000-0x0000000001F54000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-15 11:43

Reported

2024-04-15 11:46

Platform

win10v2004-20240412-en

Max time kernel

147s

Max time network

154s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\f0f9d394d608be66b3b4f56efaba3bca_JaffaCakes118.dll

Signatures

Installs/modifies Browser Helper Object

stealer adware
Description Indicator Process Target
Key created \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{CC01FC6C-5B28-9558-58EE-FEE16AD28C31} C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-5B28-9558-58EE-FEE16AD28C31}\ = "brm inc" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\f0f9d394d608be66b3b4f56efaba3bca_JaffaCakes118.brm inc C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\f0f9d394d608be66b3b4f56efaba3bca_JaffaCakes118.brm inc\ = "brm inc" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\f0f9d394d608be66b3b4f56efaba3bca_JaffaCakes118.brm inc\Clsid\ = "{CC01FC6C-5B28-9558-58EE-FEE16AD28C31}" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\f0f9d394d608be66b3b4f56efaba3bca_JaffaCakes118.brm inc\Clsid C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-5B28-9558-58EE-FEE16AD28C31}\ProgID C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-5B28-9558-58EE-FEE16AD28C31}\ProgID\ = "f0f9d394d608be66b3b4f56efaba3bca_JaffaCakes118.brm inc" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-5B28-9558-58EE-FEE16AD28C31} C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-5B28-9558-58EE-FEE16AD28C31}\InprocServer32 C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-5B28-9558-58EE-FEE16AD28C31}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\f0f9d394d608be66b3b4f56efaba3bca_JaffaCakes118.dll" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-5B28-9558-58EE-FEE16AD28C31}\InprocServer32\ThreadingModel = "Apartment" C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3720 wrote to memory of 4080 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 3720 wrote to memory of 4080 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 3720 wrote to memory of 4080 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe

Processes

C:\Windows\system32\regsvr32.exe

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\f0f9d394d608be66b3b4f56efaba3bca_JaffaCakes118.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\f0f9d394d608be66b3b4f56efaba3bca_JaffaCakes118.dll

Network

Country Destination Domain Proto
US 8.8.8.8:53 5.181.190.20.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 21.114.53.23.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 42.40.53.23.in-addr.arpa udp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 204.201.50.20.in-addr.arpa udp

Files

N/A