Malware Analysis Report

2025-08-05 15:53

Sample ID 240529-sks49aab4w
Target 8129f5c2ea12bcdb5692e51836a42e04_JaffaCakes118
SHA256 fcb24a9cb3150900c86e239ddf537543f7a3e92d01da38f6ffd4106aecd7e29d
Tags
persistence
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

fcb24a9cb3150900c86e239ddf537543f7a3e92d01da38f6ffd4106aecd7e29d

Threat Level: Shows suspicious behavior

The file 8129f5c2ea12bcdb5692e51836a42e04_JaffaCakes118 was found to be: Shows suspicious behavior.

Malicious Activity Summary

persistence

Deletes itself

Checks computer location settings

Executes dropped EXE

Adds Run key to start application

Drops file in System32 directory

Enumerates physical storage devices

Unsigned PE

Modifies registry class

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-29 15:11

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-29 15:11

Reported

2024-05-29 15:14

Platform

win7-20240508-en

Max time kernel

150s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\8129f5c2ea12bcdb5692e51836a42e04_JaffaCakes118.exe"

Signatures

Deletes itself

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

Executes dropped EXE

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\ = "C:\\Windows\\system32\\kkaaya.exe" C:\Users\Admin\AppData\Local\Temp\8129f5c2ea12bcdb5692e51836a42e04_JaffaCakes118.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\kkaaya.exe C:\Users\Admin\AppData\Local\Temp\8129f5c2ea12bcdb5692e51836a42e04_JaffaCakes118.exe N/A
File opened for modification C:\Windows\SysWOW64\kkaaya.exe C:\Users\Admin\AppData\Local\Temp\8129f5c2ea12bcdb5692e51836a42e04_JaffaCakes118.exe N/A

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\8129f5c2ea12bcdb5692e51836a42e04_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\8129f5c2ea12bcdb5692e51836a42e04_JaffaCakes118.exe"

C:\Windows\SysWOW64\kkaaya.exe

C:\Windows\SysWOW64\kkaaya.exe

C:\Windows\SysWOW64\WScript.exe

"C:\Windows\System32\WScript.exe" "C:\4481.vbs"

Network

Country Destination Domain Proto
US 8.8.8.8:53 jian4741050.f3322.net udp

Files

C:\Windows\SysWOW64\kkaaya.exe

MD5 8129f5c2ea12bcdb5692e51836a42e04
SHA1 3786c64ddaba900425149737008311d61bc15498
SHA256 fcb24a9cb3150900c86e239ddf537543f7a3e92d01da38f6ffd4106aecd7e29d
SHA512 40eb6b8924ab396376d36dc7c8c0d09a0f6e3bb56b548020ec9f9490e27db88d9da7cbe20f8e69ef105b80948807300feb069692751934da6bc4d10b7a2369d8

C:\4481.vbs

MD5 94886278d0f286b4386d17fd4a380edc
SHA1 36fb8ccc12c010cc9ddbeacef91b1b5fc3f92f40
SHA256 3f2ac0f1ff88f7e493c78edc7d4090b248177c0643ee92c128e2160642ede786
SHA512 ac87d89a1ce72236bebe791c5af9f03e2775ca38e894bffc43a4bd10fa06f0d2f11d5d062757039d2708689c6903d3b8cb272e7990469428cf07a67504b4f031

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-29 15:11

Reported

2024-05-29 15:14

Platform

win10v2004-20240426-en

Max time kernel

150s

Max time network

133s

Command Line

"C:\Users\Admin\AppData\Local\Temp\8129f5c2ea12bcdb5692e51836a42e04_JaffaCakes118.exe"

Signatures

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\8129f5c2ea12bcdb5692e51836a42e04_JaffaCakes118.exe N/A

Deletes itself

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

Executes dropped EXE

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\ = "C:\\Windows\\system32\\cugcue.exe" C:\Users\Admin\AppData\Local\Temp\8129f5c2ea12bcdb5692e51836a42e04_JaffaCakes118.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\cugcue.exe C:\Users\Admin\AppData\Local\Temp\8129f5c2ea12bcdb5692e51836a42e04_JaffaCakes118.exe N/A
File opened for modification C:\Windows\SysWOW64\cugcue.exe C:\Users\Admin\AppData\Local\Temp\8129f5c2ea12bcdb5692e51836a42e04_JaffaCakes118.exe N/A

Enumerates physical storage devices

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000_Classes\Local Settings C:\Users\Admin\AppData\Local\Temp\8129f5c2ea12bcdb5692e51836a42e04_JaffaCakes118.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\8129f5c2ea12bcdb5692e51836a42e04_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\8129f5c2ea12bcdb5692e51836a42e04_JaffaCakes118.exe"

C:\Windows\SysWOW64\cugcue.exe

C:\Windows\SysWOW64\cugcue.exe

C:\Windows\SysWOW64\WScript.exe

"C:\Windows\System32\WScript.exe" "C:\8065.vbs"

Network

Country Destination Domain Proto
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 68.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 jian4741050.f3322.net udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 203.107.17.2.in-addr.arpa udp
US 8.8.8.8:53 jian4741050.f3322.net udp

Files

C:\Windows\SysWOW64\cugcue.exe

MD5 8129f5c2ea12bcdb5692e51836a42e04
SHA1 3786c64ddaba900425149737008311d61bc15498
SHA256 fcb24a9cb3150900c86e239ddf537543f7a3e92d01da38f6ffd4106aecd7e29d
SHA512 40eb6b8924ab396376d36dc7c8c0d09a0f6e3bb56b548020ec9f9490e27db88d9da7cbe20f8e69ef105b80948807300feb069692751934da6bc4d10b7a2369d8

C:\8065.vbs

MD5 94886278d0f286b4386d17fd4a380edc
SHA1 36fb8ccc12c010cc9ddbeacef91b1b5fc3f92f40
SHA256 3f2ac0f1ff88f7e493c78edc7d4090b248177c0643ee92c128e2160642ede786
SHA512 ac87d89a1ce72236bebe791c5af9f03e2775ca38e894bffc43a4bd10fa06f0d2f11d5d062757039d2708689c6903d3b8cb272e7990469428cf07a67504b4f031