Malware Analysis Report

2025-08-10 22:40

Sample ID 250127-sb77tavkbl
Target JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557
SHA256 db5f68de01162f9978cee6bbd6e478400635ed609046d000144171a152055e5f
Tags
adware defense_evasion discovery 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

db5f68de01162f9978cee6bbd6e478400635ed609046d000144171a152055e5f

Threat Level: Shows suspicious behavior

The file JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557 was found to be: Shows suspicious behavior.

Malicious Activity Summary

adware defense_evasion discovery stealer

Deletes itself

Checks computer location settings

Indicator Removal: File Deletion

Installs/modifies Browser Helper Object

Drops file in System32 directory

Enumerates physical storage devices

Unsigned PE

System Location Discovery: System Language Discovery

Modifies Internet Explorer settings

Suspicious use of WriteProcessMemory

Modifies registry class

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2025-01-27 14:58

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2025-01-27 14:58

Reported

2025-01-27 15:00

Platform

win7-20240903-en

Max time kernel

119s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe"

Signatures

Deletes itself

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

Indicator Removal: File Deletion

defense_evasion

Installs/modifies Browser Helper Object

stealer adware
Description Indicator Process Target
Key created \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{EF99D588-3D5F-4194-828A-E03870A57A77} C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\lm.dat C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe N/A
File created C:\Windows\SysWOW64\gcomd32.dll C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\cmd.exe N/A

Modifies Internet Explorer settings

adware spyware
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Internet Explorer\Main\Enable Browser Extensions = "yes" C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{EF99D588-3D5F-4194-828A-E03870A57A77}\InprocServer32 C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{EF99D588-3D5F-4194-828A-E03870A57A77}\InprocServer32\ = "gcomd32.dll" C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{EF99D588-3D5F-4194-828A-E03870A57A77}\ProgID C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{EF99D588-3D5F-4194-828A-E03870A57A77}\TypeLib C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{EF99D588-3D5F-4194-828A-E03870A57A77}\ = "Rmn plugin" C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{EF99D588-3D5F-4194-828A-E03870A57A77}\InprocServer32\ThreadingModel = "Apartment" C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{EF99D588-3D5F-4194-828A-E03870A57A77}\ProgID\ = "RITLAB.1" C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{EF99D588-3D5F-4194-828A-E03870A57A77}\TypeLib\ = "{79DB35EA-0D3F-44b2-8ED4-0E80B681F1CC}" C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{EF99D588-3D5F-4194-828A-E03870A57A77} C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe

"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\JAFFAC~1.EXE >> NUL

Network

N/A

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2025-01-27 14:58

Reported

2025-01-28 02:34

Platform

win10v2004-20241007-en

Max time kernel

93s

Max time network

143s

Command Line

"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe"

Signatures

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe N/A

Indicator Removal: File Deletion

defense_evasion

Installs/modifies Browser Helper Object

stealer adware
Description Indicator Process Target
Key created \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{EF99D588-3D5F-4194-828A-E03870A57A77} C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\lm.dat C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe N/A
File created C:\Windows\SysWOW64\gcomd32.dll C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe N/A

Enumerates physical storage devices

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\cmd.exe N/A

Modifies Internet Explorer settings

adware spyware
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Enable Browser Extensions = "yes" C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe N/A

Modifies registry class

Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF99D588-3D5F-4194-828A-E03870A57A77}\ = "Rmn plugin" C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF99D588-3D5F-4194-828A-E03870A57A77}\InprocServer32 C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF99D588-3D5F-4194-828A-E03870A57A77}\InprocServer32\ = "gcomd32.dll" C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF99D588-3D5F-4194-828A-E03870A57A77}\InprocServer32\ThreadingModel = "Apartment" C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF99D588-3D5F-4194-828A-E03870A57A77}\ProgID C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF99D588-3D5F-4194-828A-E03870A57A77}\ProgID\ = "RITLAB.1" C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF99D588-3D5F-4194-828A-E03870A57A77} C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF99D588-3D5F-4194-828A-E03870A57A77}\TypeLib\ = "{79DB35EA-0D3F-44b2-8ED4-0E80B681F1CC}" C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF99D588-3D5F-4194-828A-E03870A57A77}\TypeLib C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe

"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40bf7c35b44d4b147c2e0969456bc557.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\JAFFAC~1.EXE >> NUL

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 75.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 5.114.82.104.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 53.210.109.20.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 70.252.19.2.in-addr.arpa udp

Files

N/A