Malware Analysis Report

2025-01-22 19:58

Sample ID 241016-wrcbvsxgjl
Target 4e4503798fcd4063f3535ea52e432c62_JaffaCakes118
SHA256 bb89ac25f39176f45de4a94ad9d12767b20d78b80bdd30250c616e2262a42b9c
Tags
discovery evasion ransomware
score
8/10

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
8/10

SHA256

bb89ac25f39176f45de4a94ad9d12767b20d78b80bdd30250c616e2262a42b9c

Threat Level: Likely malicious

The file 4e4503798fcd4063f3535ea52e432c62_JaffaCakes118 was found to be: Likely malicious.

Malicious Activity Summary

discovery evasion ransomware

Disables Task Manager via registry modification

Deletes itself

Sets desktop wallpaper using registry

Enumerates physical storage devices

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious behavior: RenamesItself

Suspicious use of WriteProcessMemory

Modifies Internet Explorer settings

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-16 18:08

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-10-16 18:08

Reported

2024-10-16 18:11

Platform

win7-20240729-en

Max time kernel

16s

Max time network

17s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.exe"

Signatures

Disables Task Manager via registry modification

evasion

Deletes itself

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

Sets desktop wallpaper using registry

ransomware
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Themes\\TranscodedWallpaper.jpg" C:\Users\Admin\AppData\Local\Temp\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.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\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.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
Key created \REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Internet Explorer\Desktop\General C:\Users\Admin\AppData\Local\Temp\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Internet Explorer\Desktop\General\WallpaperSource = "C:\\Users\\Admin\\Pictures\\My Wallpaper.jpg" C:\Users\Admin\AppData\Local\Temp\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.exe N/A

Suspicious behavior: RenamesItself

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2540 wrote to memory of 3020 N/A C:\Users\Admin\AppData\Local\Temp\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.exe
PID 2540 wrote to memory of 3020 N/A C:\Users\Admin\AppData\Local\Temp\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.exe
PID 2540 wrote to memory of 3020 N/A C:\Users\Admin\AppData\Local\Temp\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.exe
PID 2540 wrote to memory of 3020 N/A C:\Users\Admin\AppData\Local\Temp\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.exe
PID 3020 wrote to memory of 2300 N/A C:\Users\Admin\AppData\Local\Temp\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.exe C:\Windows\SysWOW64\cmd.exe
PID 3020 wrote to memory of 2300 N/A C:\Users\Admin\AppData\Local\Temp\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.exe C:\Windows\SysWOW64\cmd.exe
PID 3020 wrote to memory of 2300 N/A C:\Users\Admin\AppData\Local\Temp\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.exe C:\Windows\SysWOW64\cmd.exe
PID 3020 wrote to memory of 2300 N/A C:\Users\Admin\AppData\Local\Temp\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.exe C:\Windows\SysWOW64\cmd.exe

Processes

C:\Users\Admin\AppData\Local\Temp\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.exe"

C:\Users\Admin\AppData\Local\Temp\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.exe" del

C:\Windows\SysWOW64\cmd.exe

/c del C:\Users\Admin\AppData\Local\Temp\4E4503~1.EXE.tmp >> NUL

Network

N/A

Files

memory/3020-4-0x0000000000400000-0x000000000041D000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-16 18:08

Reported

2024-10-16 18:11

Platform

win10v2004-20241007-en

Max time kernel

139s

Max time network

125s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.exe"

Signatures

Disables Task Manager via registry modification

evasion

Sets desktop wallpaper using registry

ransomware
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\Desktop\Wallpaper = "\x01" C:\Users\Admin\AppData\Local\Temp\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.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\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.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
Key created \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Software\Microsoft\Internet Explorer\Desktop\General C:\Users\Admin\AppData\Local\Temp\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Internet Explorer\Desktop\General\WallpaperSource = "\x01" C:\Users\Admin\AppData\Local\Temp\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.exe N/A

Suspicious behavior: RenamesItself

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.exe"

C:\Users\Admin\AppData\Local\Temp\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\4e4503798fcd4063f3535ea52e432c62_JaffaCakes118.exe" del

C:\Windows\SysWOW64\cmd.exe

/c del C:\Users\Admin\AppData\Local\Temp\4E4503~1.EXE.tmp >> NUL

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 150.171.28.10:443 g.bing.com tcp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 17.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 212.20.149.52.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 75.117.19.2.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp

Files

memory/1132-0-0x0000000000400000-0x000000000041D000-memory.dmp