Malware Analysis Report

2025-06-16 06:35

Sample ID 240825-k82sasybmm
Target c06b83f3b18dd8b95c8dbc2768d2bcc4_JaffaCakes118
SHA256 60e2158617e48257c3b05f55506b363bf826313359815f5a7527613b07bd3d29
Tags
discovery persistence upx
score
7/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
7/10

SHA256

60e2158617e48257c3b05f55506b363bf826313359815f5a7527613b07bd3d29

Threat Level: Shows suspicious behavior

The file c06b83f3b18dd8b95c8dbc2768d2bcc4_JaffaCakes118 was found to be: Shows suspicious behavior.

Malicious Activity Summary

discovery persistence upx

Executes dropped EXE

UPX packed file

Adds Run key to start application

Drops file in Windows directory

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-25 09:17

Signatures

UPX packed file

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

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-25 09:17

Reported

2024-08-25 09:19

Platform

win10v2004-20240802-en

Max time kernel

140s

Max time network

128s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c06b83f3b18dd8b95c8dbc2768d2bcc4_JaffaCakes118.exe"

Signatures

Executes dropped EXE

Description Indicator Process Target
N/A N/A \??\c:\windows\kernels32.exe N/A

UPX packed file

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Service System = "\"c:\\windows\\kernels32.exe\"" \??\c:\windows\kernels32.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created \??\c:\windows\kernels32.exe C:\Users\Admin\AppData\Local\Temp\c06b83f3b18dd8b95c8dbc2768d2bcc4_JaffaCakes118.exe N/A
File opened for modification \??\c:\windows\kernels32.exe C:\Users\Admin\AppData\Local\Temp\c06b83f3b18dd8b95c8dbc2768d2bcc4_JaffaCakes118.exe N/A
File created C:\Windows\ieupdate.dat \??\c:\windows\kernels32.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\c06b83f3b18dd8b95c8dbc2768d2bcc4_JaffaCakes118.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language \??\c:\windows\kernels32.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\c06b83f3b18dd8b95c8dbc2768d2bcc4_JaffaCakes118.exe N/A
N/A N/A \??\c:\windows\kernels32.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\c06b83f3b18dd8b95c8dbc2768d2bcc4_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\c06b83f3b18dd8b95c8dbc2768d2bcc4_JaffaCakes118.exe"

\??\c:\windows\kernels32.exe

c:\windows\kernels32.exe

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 --field-trial-handle=3056,i,1828333185976713750,7918646547767660928,262144 --variations-seed-version --mojo-platform-channel-handle=4448 /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 www.supernet.speedserv.com udp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 smtp.mail.yahoo.com.br udp
US 8.8.8.8:53 g.bing.com udp
US 150.171.28.10:443 g.bing.com tcp
IE 87.248.97.36:25 smtp.mail.yahoo.com.br tcp
US 8.8.8.8:53 20.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 30.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 10.27.171.150.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp

Files

memory/4888-0-0x0000000000400000-0x00000000005A7000-memory.dmp

\??\c:\windows\kernels32.exe

MD5 c06b83f3b18dd8b95c8dbc2768d2bcc4
SHA1 6945940d41d3d5f12b3f2d984d7a1aadf48a5b14
SHA256 60e2158617e48257c3b05f55506b363bf826313359815f5a7527613b07bd3d29
SHA512 0a8dd91ab4b7e7322ea4c32d3b358499b2fab9ec95a869295e0839162816918982e9959920c5a61939355574a6a1c7dd1caf83a83b3a96d515c100d6a741001c

memory/1408-8-0x0000000000400000-0x00000000005A7000-memory.dmp

memory/4888-12-0x0000000000400000-0x00000000005A7000-memory.dmp

memory/1408-13-0x0000000000400000-0x00000000005A7000-memory.dmp

memory/1408-16-0x0000000000400000-0x00000000005A7000-memory.dmp

memory/1408-17-0x0000000000400000-0x00000000005A7000-memory.dmp

memory/1408-20-0x0000000000400000-0x00000000005A7000-memory.dmp

memory/1408-21-0x0000000000400000-0x00000000005A7000-memory.dmp

memory/1408-22-0x0000000000400000-0x00000000005A7000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-25 09:17

Reported

2024-08-25 09:19

Platform

win7-20240704-en

Max time kernel

140s

Max time network

18s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c06b83f3b18dd8b95c8dbc2768d2bcc4_JaffaCakes118.exe"

Signatures

Executes dropped EXE

Description Indicator Process Target
N/A N/A \??\c:\windows\kernels32.exe N/A

UPX packed file

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Service System = "\"c:\\windows\\kernels32.exe\"" \??\c:\windows\kernels32.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created \??\c:\windows\kernels32.exe C:\Users\Admin\AppData\Local\Temp\c06b83f3b18dd8b95c8dbc2768d2bcc4_JaffaCakes118.exe N/A
File opened for modification \??\c:\windows\kernels32.exe C:\Users\Admin\AppData\Local\Temp\c06b83f3b18dd8b95c8dbc2768d2bcc4_JaffaCakes118.exe N/A
File created C:\Windows\ieupdate.dat \??\c:\windows\kernels32.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\c06b83f3b18dd8b95c8dbc2768d2bcc4_JaffaCakes118.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language \??\c:\windows\kernels32.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\c06b83f3b18dd8b95c8dbc2768d2bcc4_JaffaCakes118.exe N/A
N/A N/A \??\c:\windows\kernels32.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\c06b83f3b18dd8b95c8dbc2768d2bcc4_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\c06b83f3b18dd8b95c8dbc2768d2bcc4_JaffaCakes118.exe"

\??\c:\windows\kernels32.exe

c:\windows\kernels32.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 www.supernet.speedserv.com udp
US 8.8.8.8:53 smtp.mail.yahoo.com.br udp
IE 87.248.97.36:25 smtp.mail.yahoo.com.br tcp

Files

memory/2472-1-0x0000000000400000-0x00000000005A7000-memory.dmp

memory/2472-10-0x0000000002AD0000-0x0000000002C77000-memory.dmp

memory/2248-11-0x0000000000400000-0x00000000005A7000-memory.dmp

C:\Windows\kernels32.exe

MD5 c06b83f3b18dd8b95c8dbc2768d2bcc4
SHA1 6945940d41d3d5f12b3f2d984d7a1aadf48a5b14
SHA256 60e2158617e48257c3b05f55506b363bf826313359815f5a7527613b07bd3d29
SHA512 0a8dd91ab4b7e7322ea4c32d3b358499b2fab9ec95a869295e0839162816918982e9959920c5a61939355574a6a1c7dd1caf83a83b3a96d515c100d6a741001c

memory/2472-17-0x0000000002AD0000-0x0000000002C77000-memory.dmp

memory/2472-16-0x0000000000400000-0x00000000005A7000-memory.dmp

memory/2248-18-0x0000000000400000-0x00000000005A7000-memory.dmp

memory/2248-20-0x0000000000400000-0x00000000005A7000-memory.dmp

memory/2248-21-0x0000000000400000-0x00000000005A7000-memory.dmp

memory/2248-22-0x0000000000400000-0x00000000005A7000-memory.dmp

memory/2248-23-0x0000000000400000-0x00000000005A7000-memory.dmp