Malware Analysis Report

2025-01-18 21:38

Sample ID 240415-yefjvsed84
Target f1c609d792c973110ca5c82cbc9d93ca_JaffaCakes118
SHA256 bb172d50396b100b73db6d34f353bd81afb6dbf56a32a746e4fb665cb48ba98a
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

bb172d50396b100b73db6d34f353bd81afb6dbf56a32a746e4fb665cb48ba98a

Threat Level: Shows suspicious behavior

The file f1c609d792c973110ca5c82cbc9d93ca_JaffaCakes118 was found to be: Shows suspicious behavior.

Malicious Activity Summary

adware stealer

Installs/modifies Browser Helper Object

Unsigned PE

Suspicious use of WriteProcessMemory

Modifies registry class

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-15 19:41

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-15 19:41

Reported

2024-04-15 19:44

Platform

win7-20240215-en

Max time kernel

117s

Max time network

119s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\f1c609d792c973110ca5c82cbc9d93ca_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\{7A1693A1-AFAF-4F1E-9B05-EEC38A85FBF3} C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7A1693A1-AFAF-4F1E-9B05-EEC38A85FBF3}\InprocServer32 C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7A1693A1-AFAF-4F1E-9B05-EEC38A85FBF3}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\f1c609d792c973110ca5c82cbc9d93ca_JaffaCakes118.dll" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7A1693A1-AFAF-4F1E-9B05-EEC38A85FBF3}\InprocServer32\ThreadingModel = "Apartment" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7A1693A1-AFAF-4F1E-9B05-EEC38A85FBF3} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7A1693A1-AFAF-4F1E-9B05-EEC38A85FBF3}\ C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1512 wrote to memory of 2280 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1512 wrote to memory of 2280 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1512 wrote to memory of 2280 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1512 wrote to memory of 2280 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1512 wrote to memory of 2280 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1512 wrote to memory of 2280 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1512 wrote to memory of 2280 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\f1c609d792c973110ca5c82cbc9d93ca_JaffaCakes118.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\f1c609d792c973110ca5c82cbc9d93ca_JaffaCakes118.dll

Network

N/A

Files

memory/2280-0-0x0000000000260000-0x00000000002BC000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-15 19:41

Reported

2024-04-15 19:44

Platform

win10v2004-20240412-en

Max time kernel

150s

Max time network

152s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\f1c609d792c973110ca5c82cbc9d93ca_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\{7A1693A1-AFAF-4F1E-9B05-EEC38A85FBF3} C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7A1693A1-AFAF-4F1E-9B05-EEC38A85FBF3}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\f1c609d792c973110ca5c82cbc9d93ca_JaffaCakes118.dll" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7A1693A1-AFAF-4F1E-9B05-EEC38A85FBF3}\InprocServer32\ThreadingModel = "Apartment" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7A1693A1-AFAF-4F1E-9B05-EEC38A85FBF3} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7A1693A1-AFAF-4F1E-9B05-EEC38A85FBF3}\ C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7A1693A1-AFAF-4F1E-9B05-EEC38A85FBF3}\InprocServer32 C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4980 wrote to memory of 372 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 4980 wrote to memory of 372 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 4980 wrote to memory of 372 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\f1c609d792c973110ca5c82cbc9d93ca_JaffaCakes118.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\f1c609d792c973110ca5c82cbc9d93ca_JaffaCakes118.dll

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 22.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.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 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 udp

Files

memory/372-0-0x0000000001F50000-0x0000000001FAC000-memory.dmp