Malware Analysis Report

2025-08-11 07:36

Sample ID 241015-3yw36stbne
Target 4a8e5af317ef801fabd917bea86e1ba1_JaffaCakes118
SHA256 7fefe061be5be2911741da8959486dc21bfee0ec207259a663872f74b4f4ba27
Tags
bootkit discovery 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

7fefe061be5be2911741da8959486dc21bfee0ec207259a663872f74b4f4ba27

Threat Level: Shows suspicious behavior

The file 4a8e5af317ef801fabd917bea86e1ba1_JaffaCakes118 was found to be: Shows suspicious behavior.

Malicious Activity Summary

bootkit discovery persistence

Loads dropped DLL

Writes to the Master Boot Record (MBR)

Drops file in System32 directory

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious behavior: EnumeratesProcesses

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-15 23:55

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-10-15 23:55

Reported

2024-10-15 23:58

Platform

win7-20240903-en

Max time kernel

121s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4a8e5af317ef801fabd917bea86e1ba1_JaffaCakes118.exe"

Signatures

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\4a8e5af317ef801fabd917bea86e1ba1_JaffaCakes118.exe N/A

Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PhysicalDrive0 C:\Users\Admin\AppData\Local\Temp\4a8e5af317ef801fabd917bea86e1ba1_JaffaCakes118.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\SkinH_EL.dll C:\Users\Admin\AppData\Local\Temp\4a8e5af317ef801fabd917bea86e1ba1_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\4a8e5af317ef801fabd917bea86e1ba1_JaffaCakes118.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\4a8e5af317ef801fabd917bea86e1ba1_JaffaCakes118.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\4a8e5af317ef801fabd917bea86e1ba1_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\4a8e5af317ef801fabd917bea86e1ba1_JaffaCakes118.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 ftp3066888.53.yundns.com.cn udp
IN 172.232.112.221:80 ftp3066888.53.yundns.com.cn tcp
IN 172.232.112.221:80 ftp3066888.53.yundns.com.cn tcp
IN 172.232.112.221:80 ftp3066888.53.yundns.com.cn tcp
IN 172.232.112.221:80 ftp3066888.53.yundns.com.cn tcp

Files

memory/2868-0-0x0000000000400000-0x0000000000818000-memory.dmp

\Windows\SysWOW64\SkinH_EL.dll

MD5 bd42ef63fc0f79fdaaeca95d62a96bbb
SHA1 97ca8ccb0e6f7ffeb05dc441b2427feb0b634033
SHA256 573cf4e4dfa8fe51fc8b80b79cd626cb861260d26b6e4f627841e11b4dce2f48
SHA512 431b5487003add16865538de428bf518046ee97ab6423d88f92cda4ff263f971c0cf3827049465b9288a219cc32698fd687939c7c648870dd7d8d6776735c93c

memory/2868-6-0x0000000000400000-0x0000000000818000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-15 23:55

Reported

2024-10-15 23:58

Platform

win10v2004-20241007-en

Max time kernel

149s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4a8e5af317ef801fabd917bea86e1ba1_JaffaCakes118.exe"

Signatures

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\4a8e5af317ef801fabd917bea86e1ba1_JaffaCakes118.exe N/A

Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PhysicalDrive0 C:\Users\Admin\AppData\Local\Temp\4a8e5af317ef801fabd917bea86e1ba1_JaffaCakes118.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\SkinH_EL.dll C:\Users\Admin\AppData\Local\Temp\4a8e5af317ef801fabd917bea86e1ba1_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\4a8e5af317ef801fabd917bea86e1ba1_JaffaCakes118.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\4a8e5af317ef801fabd917bea86e1ba1_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\4a8e5af317ef801fabd917bea86e1ba1_JaffaCakes118.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 ftp3066888.53.yundns.com.cn udp
IN 172.232.112.221:80 ftp3066888.53.yundns.com.cn tcp
IN 172.232.112.221:80 ftp3066888.53.yundns.com.cn tcp
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 72.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
IN 172.232.112.221:80 ftp3066888.53.yundns.com.cn tcp
US 8.8.8.8:53 221.112.232.172.in-addr.arpa udp
IN 172.232.112.221:80 ftp3066888.53.yundns.com.cn tcp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 53.210.109.20.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 11.227.111.52.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 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 10.27.171.150.in-addr.arpa udp
US 8.8.8.8:53 170.253.116.51.in-addr.arpa udp

Files

memory/1032-0-0x0000000000400000-0x0000000000818000-memory.dmp

C:\Windows\SysWOW64\SkinH_EL.dll

MD5 bd42ef63fc0f79fdaaeca95d62a96bbb
SHA1 97ca8ccb0e6f7ffeb05dc441b2427feb0b634033
SHA256 573cf4e4dfa8fe51fc8b80b79cd626cb861260d26b6e4f627841e11b4dce2f48
SHA512 431b5487003add16865538de428bf518046ee97ab6423d88f92cda4ff263f971c0cf3827049465b9288a219cc32698fd687939c7c648870dd7d8d6776735c93c

memory/1032-7-0x0000000000400000-0x0000000000818000-memory.dmp