Malware Analysis Report

2025-01-18 21:39

Sample ID 240415-yn56waeg59
Target f1cd8f79c76e25351083223f1095dfdb_JaffaCakes118
SHA256 b2dcaf5321231924745898afbd6427041fac0bf31f4c83fcd9037bc1a029256e
Tags
upx adware stealer
score
7/10

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
7/10

SHA256

b2dcaf5321231924745898afbd6427041fac0bf31f4c83fcd9037bc1a029256e

Threat Level: Shows suspicious behavior

The file f1cd8f79c76e25351083223f1095dfdb_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

Suspicious use of WriteProcessMemory

Modifies registry class

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-15 19:56

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: behavioral2

Detonation Overview

Submitted

2024-04-15 19:56

Reported

2024-04-15 19:59

Platform

win10v2004-20240412-en

Max time kernel

0s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\f1cd8f79c76e25351083223f1095dfdb_JaffaCakes118.dll

Signatures

UPX packed file

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4472 wrote to memory of 5084 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 4472 wrote to memory of 5084 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 4472 wrote to memory of 5084 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\f1cd8f79c76e25351083223f1095dfdb_JaffaCakes118.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\f1cd8f79c76e25351083223f1095dfdb_JaffaCakes118.dll

Network

N/A

Files

memory/5084-0-0x0000000000400000-0x000000000043F000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-15 19:56

Reported

2024-04-15 19:59

Platform

win7-20240221-en

Max time kernel

118s

Max time network

122s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\f1cd8f79c76e25351083223f1095dfdb_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\{D862A36A-A272-4152-8F31-61E2FCC3A1CE} C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{D862A36A-A272-4152-8F31-61E2FCC3A1CE}\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\{D862A36A-A272-4152-8F31-61E2FCC3A1CE} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{D862A36A-A272-4152-8F31-61E2FCC3A1CE}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\f1cd8f79c76e25351083223f1095dfdb_JaffaCakes118.dll" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{D862A36A-A272-4152-8F31-61E2FCC3A1CE}\InprocServer32\ThreadingModel = "apartment" C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1968 wrote to memory of 2188 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1968 wrote to memory of 2188 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1968 wrote to memory of 2188 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1968 wrote to memory of 2188 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1968 wrote to memory of 2188 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1968 wrote to memory of 2188 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1968 wrote to memory of 2188 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\f1cd8f79c76e25351083223f1095dfdb_JaffaCakes118.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\f1cd8f79c76e25351083223f1095dfdb_JaffaCakes118.dll

Network

N/A

Files

memory/2188-0-0x00000000008B0000-0x00000000008EF000-memory.dmp

memory/2188-1-0x00000000008B0000-0x00000000008EF000-memory.dmp