Malware Analysis Report

2025-03-14 22:53

Sample ID 240406-1g731acd76
Target e357eba2783a9cfbb6bf4b530b547a51_JaffaCakes118
SHA256 2813b4a5697aec08070305dafa5f7d0cbcc46d407357521430382fa52eb0f05a
Tags
upx persistence spyware stealer
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

2813b4a5697aec08070305dafa5f7d0cbcc46d407357521430382fa52eb0f05a

Threat Level: Shows suspicious behavior

The file e357eba2783a9cfbb6bf4b530b547a51_JaffaCakes118 was found to be: Shows suspicious behavior.

Malicious Activity Summary

upx persistence spyware stealer

UPX packed file

Loads dropped DLL

Executes dropped EXE

Reads user/profile data of web browsers

Adds Run key to start application

Drops file in Windows directory

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-06 21:38

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: behavioral1

Detonation Overview

Submitted

2024-04-06 21:38

Reported

2024-04-06 21:40

Platform

win7-20240221-en

Max time kernel

141s

Max time network

126s

Command Line

"C:\Users\Admin\AppData\Local\Temp\e357eba2783a9cfbb6bf4b530b547a51_JaffaCakes118.exe"

Signatures

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\IL5DyGdTDiQfMlw.exe N/A
N/A N/A C:\Windows\CTS.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\e357eba2783a9cfbb6bf4b530b547a51_JaffaCakes118.exe N/A

Reads user/profile data of web browsers

spyware stealer

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" C:\Users\Admin\AppData\Local\Temp\e357eba2783a9cfbb6bf4b530b547a51_JaffaCakes118.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" C:\Windows\CTS.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\CTS.exe C:\Users\Admin\AppData\Local\Temp\e357eba2783a9cfbb6bf4b530b547a51_JaffaCakes118.exe N/A
File created C:\Windows\CTS.exe C:\Windows\CTS.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\e357eba2783a9cfbb6bf4b530b547a51_JaffaCakes118.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\CTS.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\e357eba2783a9cfbb6bf4b530b547a51_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\e357eba2783a9cfbb6bf4b530b547a51_JaffaCakes118.exe"

C:\Users\Admin\AppData\Local\Temp\IL5DyGdTDiQfMlw.exe

C:\Users\Admin\AppData\Local\Temp\IL5DyGdTDiQfMlw.exe

C:\Windows\CTS.exe

"C:\Windows\CTS.exe"

Network

N/A

Files

memory/2020-0-0x0000000000FA0000-0x0000000000FB7000-memory.dmp

\Users\Admin\AppData\Local\Temp\IL5DyGdTDiQfMlw.exe

MD5 015207664f86b0d334146d7bc7551a0f
SHA1 b466beca074c3c4a500bfa00fd691cf0fe300d8c
SHA256 3212cacc4d669f381ad1048e43726ec2841de32135438992c55f792bf03beafc
SHA512 6ced0d294fd9c330cab20739336c6cd4c1e202d521fd41c6fd6bdfe7e720247c84ac10a7e25855d3cc9b08f2d9251798eb52383527a9363c5126a6b205ff0657

memory/2020-11-0x0000000000FA0000-0x0000000000FB7000-memory.dmp

C:\Windows\CTS.exe

MD5 93e5f18caebd8d4a2c893e40e5f38232
SHA1 fd55c4e6bcd108bce60ea719c06dc9c4d0adafa6
SHA256 a66c4b98becac2f69cb107cd087d7a2ca9ef511bc3b83367b1f440f11dd159a8
SHA512 986583610d27caae2080834301d072557c5d2c85e33f0d19ab1245d7eae8db146397461572ddb3d491be16f3af210720d54267dac838fdad8fe34afa3d6b7f54

memory/2020-14-0x0000000000E90000-0x0000000000EA7000-memory.dmp

memory/2312-15-0x0000000000E90000-0x0000000000EA7000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-06 21:38

Reported

2024-04-06 21:40

Platform

win10v2004-20240226-en

Max time kernel

150s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\e357eba2783a9cfbb6bf4b530b547a51_JaffaCakes118.exe"

Signatures

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\RSMZzmsio42qqpx.exe N/A
N/A N/A C:\Windows\CTS.exe N/A

Reads user/profile data of web browsers

spyware stealer

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" C:\Windows\CTS.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" C:\Users\Admin\AppData\Local\Temp\e357eba2783a9cfbb6bf4b530b547a51_JaffaCakes118.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\CTS.exe C:\Users\Admin\AppData\Local\Temp\e357eba2783a9cfbb6bf4b530b547a51_JaffaCakes118.exe N/A
File created C:\Windows\CTS.exe C:\Windows\CTS.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\e357eba2783a9cfbb6bf4b530b547a51_JaffaCakes118.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\CTS.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\e357eba2783a9cfbb6bf4b530b547a51_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\e357eba2783a9cfbb6bf4b530b547a51_JaffaCakes118.exe"

C:\Users\Admin\AppData\Local\Temp\RSMZzmsio42qqpx.exe

C:\Users\Admin\AppData\Local\Temp\RSMZzmsio42qqpx.exe

C:\Windows\CTS.exe

"C:\Windows\CTS.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 76.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 134.71.91.104.in-addr.arpa udp
US 8.8.8.8:53 21.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 udp

Files

memory/1032-0-0x0000000000D30000-0x0000000000D47000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\RSMZzmsio42qqpx.exe

MD5 015207664f86b0d334146d7bc7551a0f
SHA1 b466beca074c3c4a500bfa00fd691cf0fe300d8c
SHA256 3212cacc4d669f381ad1048e43726ec2841de32135438992c55f792bf03beafc
SHA512 6ced0d294fd9c330cab20739336c6cd4c1e202d521fd41c6fd6bdfe7e720247c84ac10a7e25855d3cc9b08f2d9251798eb52383527a9363c5126a6b205ff0657

C:\Windows\CTS.exe

MD5 93e5f18caebd8d4a2c893e40e5f38232
SHA1 fd55c4e6bcd108bce60ea719c06dc9c4d0adafa6
SHA256 a66c4b98becac2f69cb107cd087d7a2ca9ef511bc3b83367b1f440f11dd159a8
SHA512 986583610d27caae2080834301d072557c5d2c85e33f0d19ab1245d7eae8db146397461572ddb3d491be16f3af210720d54267dac838fdad8fe34afa3d6b7f54

memory/1032-7-0x0000000000D30000-0x0000000000D47000-memory.dmp

memory/3936-9-0x00000000007C0000-0x00000000007D7000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml

MD5 2894df299a8da301232f5ad6f56506d0
SHA1 966d1016e1987e39c5e22afe90e77424d7b067be
SHA256 44baedb98cbb64be93c3cfd5083a52ba71e5cedb201d9721c8caa0a7ba53c474
SHA512 cc498f4efd535c51e0fd1bf7c621b20fcc980b14e94a19722faba5cb306d4057051d7b7de4e23af34daffda8343a3abf85e9ee157ee72c5ffc0232b99fa84bbb