Malware Analysis Report

2025-01-18 21:34

Sample ID 240414-x9vrlaee4s
Target ef5720e908fe639b75defc0674a772e9_JaffaCakes118
SHA256 bdd5125525e0b44bacb2b145880e8eccd7c579dfbe703223428c371f354e3d06
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

bdd5125525e0b44bacb2b145880e8eccd7c579dfbe703223428c371f354e3d06

Threat Level: Shows suspicious behavior

The file ef5720e908fe639b75defc0674a772e9_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

2024-04-14 19:33

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-14 19:33

Reported

2024-04-14 19:36

Platform

win7-20240221-en

Max time kernel

120s

Max time network

124s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\ef5720e908fe639b75defc0674a772e9_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\{C2B5AAB8-2183-4be7-81A6-F11493C45872} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{C2B5AAB8-2183-4be7-81A6-F11493C45872}\NoExplorer = "1" C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{C2B5AAB8-2183-4be7-81A6-F11493C45872}\InProcServer32\ C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{C2B5AAB8-2183-4be7-81A6-F11493C45872}\InProcServer32\ThreadingModel = "Apartment" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{C2B5AAB8-2183-4be7-81A6-F11493C45872} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{C2B5AAB8-2183-4be7-81A6-F11493C45872}\ = "Antivirus Plus BHO" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{C2B5AAB8-2183-4be7-81A6-F11493C45872}\InProcServer32 C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2148 wrote to memory of 2604 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2148 wrote to memory of 2604 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2148 wrote to memory of 2604 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2148 wrote to memory of 2604 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2148 wrote to memory of 2604 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2148 wrote to memory of 2604 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2148 wrote to memory of 2604 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\ef5720e908fe639b75defc0674a772e9_JaffaCakes118.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\ef5720e908fe639b75defc0674a772e9_JaffaCakes118.dll

Network

N/A

Files

memory/2604-6-0x0000000001E70000-0x00000000020B2000-memory.dmp

memory/2604-3-0x0000000001E70000-0x00000000020B2000-memory.dmp

memory/2604-0-0x0000000000180000-0x0000000000192000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-14 19:33

Reported

2024-04-14 19:36

Platform

win10v2004-20240412-en

Max time kernel

146s

Max time network

151s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\ef5720e908fe639b75defc0674a772e9_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\{C2B5AAB8-2183-4be7-81A6-F11493C45872} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{C2B5AAB8-2183-4be7-81A6-F11493C45872}\NoExplorer = "1" C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C2B5AAB8-2183-4be7-81A6-F11493C45872} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C2B5AAB8-2183-4be7-81A6-F11493C45872}\ = "Antivirus Plus BHO" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C2B5AAB8-2183-4be7-81A6-F11493C45872}\InProcServer32 C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C2B5AAB8-2183-4be7-81A6-F11493C45872}\InProcServer32\ C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C2B5AAB8-2183-4be7-81A6-F11493C45872}\InProcServer32\ThreadingModel = "Apartment" C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2124 wrote to memory of 2732 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2124 wrote to memory of 2732 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2124 wrote to memory of 2732 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\ef5720e908fe639b75defc0674a772e9_JaffaCakes118.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\ef5720e908fe639b75defc0674a772e9_JaffaCakes118.dll

Network

Country Destination Domain Proto
US 8.8.8.8:53 134.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 240.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 249.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 142.53.16.96.in-addr.arpa udp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 210.143.182.52.in-addr.arpa udp

Files

memory/2732-1-0x0000000002B50000-0x0000000002D92000-memory.dmp

memory/2732-0-0x0000000000BE0000-0x0000000000BF2000-memory.dmp

memory/2732-6-0x0000000002B50000-0x0000000002D92000-memory.dmp