Malware Analysis Report

2024-08-06 10:15

Sample ID 240611-pv9cfaxbmb
Target 9e35ecdc339aef986de27c102a35ca0f_JaffaCakes118
SHA256 c8ad61a8d8750e6bbda5b43733e9a0f70ca9df0d8d4df904f72706a4cf9ea154
Tags
0 cobaltstrike
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

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
10/10

SHA256

c8ad61a8d8750e6bbda5b43733e9a0f70ca9df0d8d4df904f72706a4cf9ea154

Threat Level: Known bad

The file 9e35ecdc339aef986de27c102a35ca0f_JaffaCakes118 was found to be: Known bad.

Malicious Activity Summary

0 cobaltstrike

Cobalt Strike reflective loader

Cobaltstrike family

Program crash

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix

N/A

Analysis: static1

Detonation Overview

Reported

2024-06-11 12:40

Signatures

Cobalt Strike reflective loader

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

Cobaltstrike family

cobaltstrike

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-11 12:40

Reported

2024-06-11 12:42

Platform

win7-20240220-en

Max time kernel

120s

Max time network

120s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\9e35ecdc339aef986de27c102a35ca0f_JaffaCakes118.dll,#1

Signatures

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Windows\SysWOW64\rundll32.exe

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3028 wrote to memory of 3040 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3028 wrote to memory of 3040 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3028 wrote to memory of 3040 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3028 wrote to memory of 3040 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3028 wrote to memory of 3040 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3028 wrote to memory of 3040 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3028 wrote to memory of 3040 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3040 wrote to memory of 2892 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\WerFault.exe
PID 3040 wrote to memory of 2892 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\WerFault.exe
PID 3040 wrote to memory of 2892 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\WerFault.exe
PID 3040 wrote to memory of 2892 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\WerFault.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\9e35ecdc339aef986de27c102a35ca0f_JaffaCakes118.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\9e35ecdc339aef986de27c102a35ca0f_JaffaCakes118.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3040 -s 240

Network

N/A

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-11 12:40

Reported

2024-06-11 12:42

Platform

win10v2004-20240508-en

Max time kernel

142s

Max time network

152s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\9e35ecdc339aef986de27c102a35ca0f_JaffaCakes118.dll,#1

Signatures

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Windows\SysWOW64\rundll32.exe

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4044 wrote to memory of 212 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4044 wrote to memory of 212 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4044 wrote to memory of 212 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\9e35ecdc339aef986de27c102a35ca0f_JaffaCakes118.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\9e35ecdc339aef986de27c102a35ca0f_JaffaCakes118.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 212 -ip 212

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 212 -s 684

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=3804,i,1999448010053300448,1112699187621658374,262144 --variations-seed-version --mojo-platform-channel-handle=4004 /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp

Files

N/A