Malware Analysis Report

2025-01-18 21:45

Sample ID 240414-1cmaqsgg91
Target ef8d8796e7c0b7c84b1720ab9af98e2f_JaffaCakes118
SHA256 9727f43d5de7768675f16cf8e5231cc5aa922949bda8a9686c1dc6a3c7c4395a
Tags
upx adware stealer
score
7/10

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
7/10

SHA256

9727f43d5de7768675f16cf8e5231cc5aa922949bda8a9686c1dc6a3c7c4395a

Threat Level: Shows suspicious behavior

The file ef8d8796e7c0b7c84b1720ab9af98e2f_JaffaCakes118 was found to be: Shows suspicious behavior.

Malicious Activity Summary

upx adware stealer

UPX packed file

ACProtect 1.3x - 1.4x DLL software

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 21:30

Signatures

ACProtect 1.3x - 1.4x DLL software

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

UPX packed file

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

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-14 21:30

Reported

2024-04-14 21:32

Platform

win7-20240221-en

Max time kernel

122s

Max time network

125s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\ef8d8796e7c0b7c84b1720ab9af98e2f_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\{48AF18CC-A4E8-4196-A5F0-351422C80C83} C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{48AF18CC-A4E8-4196-A5F0-351422C80C83} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{48AF18CC-A4E8-4196-A5F0-351422C80C83}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ef8d8796e7c0b7c84b1720ab9af98e2f_JaffaCakes118.dll" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{48AF18CC-A4E8-4196-A5F0-351422C80C83}\InprocServer32\ThreadingModel = "apartment" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{48AF18CC-A4E8-4196-A5F0-351422C80C83}\InprocServer32 C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID C:\Windows\SysWOW64\regsvr32.exe N/A

Processes

C:\Windows\system32\regsvr32.exe

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\ef8d8796e7c0b7c84b1720ab9af98e2f_JaffaCakes118.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\ef8d8796e7c0b7c84b1720ab9af98e2f_JaffaCakes118.dll

Network

N/A

Files

memory/768-0-0x00000000001A0000-0x00000000001DF000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-14 21:30

Reported

2024-04-14 21:33

Platform

win10v2004-20240412-en

Max time kernel

148s

Max time network

152s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\ef8d8796e7c0b7c84b1720ab9af98e2f_JaffaCakes118.dll

Signatures

UPX packed file

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

Installs/modifies Browser Helper Object

stealer adware
Description Indicator Process Target
Key created \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{8273B8DB-3E42-4593-B9ED-8395370E29D9} C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{8273B8DB-3E42-4593-B9ED-8395370E29D9}\InprocServer32 C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{8273B8DB-3E42-4593-B9ED-8395370E29D9} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{8273B8DB-3E42-4593-B9ED-8395370E29D9}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ef8d8796e7c0b7c84b1720ab9af98e2f_JaffaCakes118.dll" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{8273B8DB-3E42-4593-B9ED-8395370E29D9}\InprocServer32\ThreadingModel = "apartment" C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1352 wrote to memory of 1640 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1352 wrote to memory of 1640 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1352 wrote to memory of 1640 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\ef8d8796e7c0b7c84b1720ab9af98e2f_JaffaCakes118.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\ef8d8796e7c0b7c84b1720ab9af98e2f_JaffaCakes118.dll

Network

Country Destination Domain Proto
US 8.8.8.8:53 71.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 21.114.53.23.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 17.14.97.104.in-addr.arpa udp
US 8.8.8.8:53 249.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 123.10.44.20.in-addr.arpa udp

Files

memory/1640-0-0x00000000007A0000-0x00000000007DF000-memory.dmp

memory/1640-1-0x00000000007A0000-0x00000000007DF000-memory.dmp