Malware Analysis Report

2025-01-18 21:40

Sample ID 240415-rx7bzaah8z
Target f14a5bfdadc915efd8748d77fcaad8e6_JaffaCakes118
SHA256 7351886cdf3a677ad115591ec23b61d836596bcc5fb7b3f49a816867e6d8fc51
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

7351886cdf3a677ad115591ec23b61d836596bcc5fb7b3f49a816867e6d8fc51

Threat Level: Shows suspicious behavior

The file f14a5bfdadc915efd8748d77fcaad8e6_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 14:35

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-15 14:35

Reported

2024-04-15 14:37

Platform

win7-20240221-en

Max time kernel

119s

Max time network

120s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\f14a5bfdadc915efd8748d77fcaad8e6_JaffaCakes118.dll

Signatures

Installs/modifies Browser Helper Object

stealer adware
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{317833AD-3A96-11DC-8314-0911200C9A66}\1 = "2" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{317833AD-3A96-11DC-8314-0911200C9A66} C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{317833AD-3A96-11DC-8314-0911200C9A66} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{317833AD-3A96-11DC-8314-0911200C9A66}\ = "BHO-X" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{317833AD-3A96-11DC-8314-0911200C9A66}\InProcServer32 C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{317833AD-3A96-11DC-8314-0911200C9A66}\InProcServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\f14a5bfdadc915efd8748d77fcaad8e6_JaffaCakes118.dll" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{317833AD-3A96-11DC-8314-0911200C9A66}\InProcServer32\ThreadingModel = "Apartment" C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2236 wrote to memory of 2608 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2236 wrote to memory of 2608 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2236 wrote to memory of 2608 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2236 wrote to memory of 2608 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2236 wrote to memory of 2608 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2236 wrote to memory of 2608 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2236 wrote to memory of 2608 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\f14a5bfdadc915efd8748d77fcaad8e6_JaffaCakes118.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\f14a5bfdadc915efd8748d77fcaad8e6_JaffaCakes118.dll

Network

N/A

Files

memory/2608-0-0x0000000010000000-0x0000000010041000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-15 14:35

Reported

2024-04-15 14:38

Platform

win10v2004-20240412-en

Max time kernel

91s

Max time network

128s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\f14a5bfdadc915efd8748d77fcaad8e6_JaffaCakes118.dll

Signatures

Installs/modifies Browser Helper Object

stealer adware
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{317833AD-3A96-11DC-8314-0911200C9A66}\1 = "2" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{317833AD-3A96-11DC-8314-0911200C9A66} C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{317833AD-3A96-11DC-8314-0911200C9A66} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{317833AD-3A96-11DC-8314-0911200C9A66}\ = "BHO-X" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{317833AD-3A96-11DC-8314-0911200C9A66}\InProcServer32 C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{317833AD-3A96-11DC-8314-0911200C9A66}\InProcServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\f14a5bfdadc915efd8748d77fcaad8e6_JaffaCakes118.dll" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{317833AD-3A96-11DC-8314-0911200C9A66}\InProcServer32\ThreadingModel = "Apartment" C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3752 wrote to memory of 3884 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 3752 wrote to memory of 3884 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 3752 wrote to memory of 3884 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\f14a5bfdadc915efd8748d77fcaad8e6_JaffaCakes118.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\f14a5bfdadc915efd8748d77fcaad8e6_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 74.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 159.113.53.23.in-addr.arpa udp
NL 23.62.61.163:443 www.bing.com tcp
US 8.8.8.8:53 237.197.79.204.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 8.8.8.8:53 178.223.142.52.in-addr.arpa udp
US 8.8.8.8:53 163.61.62.23.in-addr.arpa udp
US 13.89.179.13:443 tcp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
BE 2.17.197.240:80 tcp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp

Files

memory/3884-0-0x0000000010000000-0x0000000010041000-memory.dmp