Malware Analysis Report

2025-01-18 21:39

Sample ID 240415-q4y4hafh26
Target f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118
SHA256 6b4d50ee4950a8a97627c9281f3cca2266d1d16d20adc249c3f9a84c29967b94
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

6b4d50ee4950a8a97627c9281f3cca2266d1d16d20adc249c3f9a84c29967b94

Threat Level: Shows suspicious behavior

The file f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118 was found to be: Shows suspicious behavior.

Malicious Activity Summary

adware stealer

Installs/modifies Browser Helper Object

Drops file in System32 directory

Drops file in Program Files directory

Unsigned PE

Modifies registry class

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-15 13:49

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-15 13:49

Reported

2024-04-15 13:52

Platform

win7-20240220-en

Max time kernel

119s

Max time network

120s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\f1355d1e00ebb8f7bc4cbbc6b173a346_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\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A} C:\Windows\SysWOW64\regsvr32.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\c__3948.nls C:\Windows\SysWOW64\regsvr32.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File opened for modification C:\Program Files\Mozilla Firefox\firefox.exe C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}\ = "NETWORK SERVICE" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}\InprocServer32 C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}\InprocServer32\ThreadingModel = "Apartment" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}\ProgID C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}\ProgID\ = "f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118.Microsoft Update Service" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118.dll" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118.Microsoft Update Service C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118.Microsoft Update Service\ = "NETWORK SERVICE" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118.Microsoft Update Service\Clsid C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118.Microsoft Update Service\Clsid\ = "{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}" C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\regsvr32.exe N/A
N/A N/A C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2764 wrote to memory of 2128 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2764 wrote to memory of 2128 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2764 wrote to memory of 2128 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2764 wrote to memory of 2128 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2764 wrote to memory of 2128 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2764 wrote to memory of 2128 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2764 wrote to memory of 2128 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\f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118.dll

Network

N/A

Files

memory/2128-0-0x0000000000670000-0x0000000000749000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-15 13:49

Reported

2024-04-15 13:52

Platform

win10v2004-20240412-en

Max time kernel

147s

Max time network

154s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\f1355d1e00ebb8f7bc4cbbc6b173a346_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\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A} C:\Windows\SysWOW64\regsvr32.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\c__3948.nls C:\Windows\SysWOW64\regsvr32.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File opened for modification C:\Program Files\Mozilla Firefox\firefox.exe C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118.dll" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118.Microsoft Update Service C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118.Microsoft Update Service\Clsid C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}\ProgID C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}\ = "NETWORK SERVICE" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118.Microsoft Update Service\ = "NETWORK SERVICE" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118.Microsoft Update Service\Clsid\ = "{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}\ProgID\ = "f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118.Microsoft Update Service" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}\InprocServer32 C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}\InprocServer32\ThreadingModel = "Apartment" C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\regsvr32.exe N/A
N/A N/A C:\Windows\SysWOW64\regsvr32.exe N/A
N/A N/A C:\Windows\SysWOW64\regsvr32.exe N/A
N/A N/A C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3008 wrote to memory of 1336 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 3008 wrote to memory of 1336 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 3008 wrote to memory of 1336 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\f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\f1355d1e00ebb8f7bc4cbbc6b173a346_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 17.160.190.20.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 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 21.114.53.23.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 17.143.109.104.in-addr.arpa udp
US 8.8.8.8:53 249.197.17.2.in-addr.arpa udp
IE 52.111.236.22:443 tcp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 241.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 204.201.50.20.in-addr.arpa udp

Files

memory/1336-0-0x0000000000800000-0x00000000008D9000-memory.dmp