Malware Analysis Report

2025-01-18 21:40

Sample ID 240415-x79sqsgd9w
Target f1c088fa2b4af4b4dcf1de688f79218e_JaffaCakes118
SHA256 79e56af530c7e790395ae6e807d5d2dbbef9b483cca03b790e538c0514323891
Tags
adware stealer
score
6/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
6/10

SHA256

79e56af530c7e790395ae6e807d5d2dbbef9b483cca03b790e538c0514323891

Threat Level: Shows suspicious behavior

The file f1c088fa2b4af4b4dcf1de688f79218e_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 19:30

Signatures

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-15 19:30

Reported

2024-04-15 19:33

Platform

win10v2004-20240412-en

Max time kernel

150s

Max time network

150s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\f1c088fa2b4af4b4dcf1de688f79218e_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\{C2A1C5CB-C0EF-4689-9436-F62CCA1C5383} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{C2A1C5CB-C0EF-4689-9436-F62CCA1C5383}\ C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C2A1C5CB-C0EF-4689-9436-F62CCA1C5383}\InprocServer32\ThreadingModel = "Apartment" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\Software\Classes\WOW6432Node\CLSID\{C2A1C5CB-C0EF-4689-9436-F62CCA1C5383} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C2A1C5CB-C0EF-4689-9436-F62CCA1C5383}\xxx = "xxx" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\Software\Classes\WOW6432Node\CLSID\{C2A1C5CB-C0EF-4689-9436-F62CCA1C5383}\InprocServer32 C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C2A1C5CB-C0EF-4689-9436-F62CCA1C5383}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\f1c088fa2b4af4b4dcf1de688f79218e_JaffaCakes118.dll" C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1884 wrote to memory of 2828 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1884 wrote to memory of 2828 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1884 wrote to memory of 2828 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\f1c088fa2b4af4b4dcf1de688f79218e_JaffaCakes118.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\f1c088fa2b4af4b4dcf1de688f79218e_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 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 196.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 71.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 21.114.53.23.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 140.71.91.104.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 udp

Files

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-15 19:30

Reported

2024-04-15 19:33

Platform

win7-20240221-en

Max time kernel

122s

Max time network

126s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\f1c088fa2b4af4b4dcf1de688f79218e_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\{C2A1C5CB-C0EF-4689-9436-F62CCA1C5383} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{C2A1C5CB-C0EF-4689-9436-F62CCA1C5383}\ C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\MACHINE\Software\Classes\Wow6432Node\CLSID\{C2A1C5CB-C0EF-4689-9436-F62CCA1C5383} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{C2A1C5CB-C0EF-4689-9436-F62CCA1C5383}\xxx = "xxx" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\Software\Classes\Wow6432Node\CLSID\{C2A1C5CB-C0EF-4689-9436-F62CCA1C5383}\InprocServer32 C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{C2A1C5CB-C0EF-4689-9436-F62CCA1C5383}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\f1c088fa2b4af4b4dcf1de688f79218e_JaffaCakes118.dll" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{C2A1C5CB-C0EF-4689-9436-F62CCA1C5383}\InprocServer32\ThreadingModel = "Apartment" C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2972 wrote to memory of 2284 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2972 wrote to memory of 2284 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2972 wrote to memory of 2284 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2972 wrote to memory of 2284 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2972 wrote to memory of 2284 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2972 wrote to memory of 2284 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2972 wrote to memory of 2284 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\f1c088fa2b4af4b4dcf1de688f79218e_JaffaCakes118.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\f1c088fa2b4af4b4dcf1de688f79218e_JaffaCakes118.dll

Network

N/A

Files

N/A