Malware Analysis Report

2025-01-18 21:37

Sample ID 240415-vnrrpsbe85
Target f18eca2bc9c3df81c3dd85ef44f43417_JaffaCakes118
SHA256 d548941884f52509f8c0fa8333f867c09850488f258ca6cac86c5a7ef6855d9e
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

d548941884f52509f8c0fa8333f867c09850488f258ca6cac86c5a7ef6855d9e

Threat Level: Shows suspicious behavior

The file f18eca2bc9c3df81c3dd85ef44f43417_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 17:08

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-15 17:08

Reported

2024-04-15 17:11

Platform

win7-20231129-en

Max time kernel

119s

Max time network

119s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\f18eca2bc9c3df81c3dd85ef44f43417_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-B82E-4781-13BF-71B93489FDC8} C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\f18eca2bc9c3df81c3dd85ef44f43417_JaffaCakes118.brm inc C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\f18eca2bc9c3df81c3dd85ef44f43417_JaffaCakes118.brm inc\Clsid C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-B82E-4781-13BF-71B93489FDC8}\ProgID\ = "f18eca2bc9c3df81c3dd85ef44f43417_JaffaCakes118.brm inc" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-B82E-4781-13BF-71B93489FDC8} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-B82E-4781-13BF-71B93489FDC8}\ = "brm inc" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-B82E-4781-13BF-71B93489FDC8}\InprocServer32 C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-B82E-4781-13BF-71B93489FDC8}\InprocServer32\ThreadingModel = "Apartment" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-B82E-4781-13BF-71B93489FDC8}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\f18eca2bc9c3df81c3dd85ef44f43417_JaffaCakes118.dll" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\f18eca2bc9c3df81c3dd85ef44f43417_JaffaCakes118.brm inc\ = "brm inc" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\f18eca2bc9c3df81c3dd85ef44f43417_JaffaCakes118.brm inc\Clsid\ = "{CC01FC6C-B82E-4781-13BF-71B93489FDC8}" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-B82E-4781-13BF-71B93489FDC8}\ProgID C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1108 wrote to memory of 2188 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1108 wrote to memory of 2188 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1108 wrote to memory of 2188 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1108 wrote to memory of 2188 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1108 wrote to memory of 2188 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1108 wrote to memory of 2188 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1108 wrote to memory of 2188 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\f18eca2bc9c3df81c3dd85ef44f43417_JaffaCakes118.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\f18eca2bc9c3df81c3dd85ef44f43417_JaffaCakes118.dll

Network

N/A

Files

memory/2188-0-0x0000000001DD0000-0x0000000001E74000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-15 17:08

Reported

2024-04-15 17:11

Platform

win10v2004-20240412-en

Max time kernel

150s

Max time network

161s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\f18eca2bc9c3df81c3dd85ef44f43417_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-B82E-4781-13BF-71B93489FDC8} C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-B82E-4781-13BF-71B93489FDC8}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\f18eca2bc9c3df81c3dd85ef44f43417_JaffaCakes118.dll" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\f18eca2bc9c3df81c3dd85ef44f43417_JaffaCakes118.brm inc\Clsid C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-B82E-4781-13BF-71B93489FDC8}\ProgID C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-B82E-4781-13BF-71B93489FDC8}\ProgID\ = "f18eca2bc9c3df81c3dd85ef44f43417_JaffaCakes118.brm inc" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-B82E-4781-13BF-71B93489FDC8} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-B82E-4781-13BF-71B93489FDC8}\ = "brm inc" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-B82E-4781-13BF-71B93489FDC8}\InprocServer32 C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-B82E-4781-13BF-71B93489FDC8}\InprocServer32\ThreadingModel = "Apartment" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\f18eca2bc9c3df81c3dd85ef44f43417_JaffaCakes118.brm inc C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\f18eca2bc9c3df81c3dd85ef44f43417_JaffaCakes118.brm inc\ = "brm inc" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\f18eca2bc9c3df81c3dd85ef44f43417_JaffaCakes118.brm inc\Clsid\ = "{CC01FC6C-B82E-4781-13BF-71B93489FDC8}" C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1092 wrote to memory of 3284 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1092 wrote to memory of 3284 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1092 wrote to memory of 3284 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\f18eca2bc9c3df81c3dd85ef44f43417_JaffaCakes118.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\f18eca2bc9c3df81c3dd85ef44f43417_JaffaCakes118.dll

Network

Country Destination Domain Proto
US 8.8.8.8:53 214.143.182.52.in-addr.arpa udp
US 8.8.8.8:53 82.90.14.23.in-addr.arpa udp
US 8.8.8.8:53 72.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 21.114.53.23.in-addr.arpa udp
US 8.8.8.8:53 159.113.53.23.in-addr.arpa udp

Files

memory/3284-0-0x00000000007F0000-0x0000000000894000-memory.dmp