Malware Analysis Report

2025-08-05 19:17

Sample ID 240513-mtyhfabg98
Target 3f1a620f0fda6d8f7f62a458a887178d_JaffaCakes118
SHA256 4c7ee81dc0968710f1b7c0368d501216e0bb1189ddf70483997aef46ab56988d
Tags
upx evasion persistence trojan
score
10/10

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
10/10

SHA256

4c7ee81dc0968710f1b7c0368d501216e0bb1189ddf70483997aef46ab56988d

Threat Level: Known bad

The file 3f1a620f0fda6d8f7f62a458a887178d_JaffaCakes118 was found to be: Known bad.

Malicious Activity Summary

upx evasion persistence trojan

Modifies WinLogon for persistence

UAC bypass

UPX packed file

Unsigned PE

Enumerates physical storage devices

System policy modification

Modifies registry class

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-13 10:46

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

2024-05-13 10:46

Reported

2024-05-13 10:48

Platform

win7-20231129-en

Max time kernel

119s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\3f1a620f0fda6d8f7f62a458a887178d_JaffaCakes118.exe"

Signatures

Modifies WinLogon for persistence

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\system32\\userinit.exe,\"C:\\Users\\Admin\\AppData\\Local\\stP2ecXZAz\\DEQVNMxjbG.exe\" -s" C:\Users\Admin\AppData\Local\Temp\3f1a620f0fda6d8f7f62a458a887178d_JaffaCakes118.exe N/A

UAC bypass

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" C:\Users\Admin\AppData\Local\Temp\3f1a620f0fda6d8f7f62a458a887178d_JaffaCakes118.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

Enumerates physical storage devices

System policy modification

evasion
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" C:\Users\Admin\AppData\Local\Temp\3f1a620f0fda6d8f7f62a458a887178d_JaffaCakes118.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\3f1a620f0fda6d8f7f62a458a887178d_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\3f1a620f0fda6d8f7f62a458a887178d_JaffaCakes118.exe"

Network

Country Destination Domain Proto
N/A 127.0.0.1:1865 tcp

Files

memory/2368-0-0x0000000000400000-0x000000000090F000-memory.dmp

memory/2368-1-0x00000000001C0000-0x00000000001C1000-memory.dmp

memory/2368-6-0x0000000000400000-0x000000000090F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-13 10:46

Reported

2024-05-13 10:48

Platform

win10v2004-20240426-en

Max time kernel

150s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\3f1a620f0fda6d8f7f62a458a887178d_JaffaCakes118.exe"

Signatures

Modifies WinLogon for persistence

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\system32\\userinit.exe,\"C:\\Users\\Admin\\AppData\\Local\\stP2ecXZAz\\DEQVNMxjbG.exe\" -s" C:\Users\Admin\AppData\Local\Temp\3f1a620f0fda6d8f7f62a458a887178d_JaffaCakes118.exe N/A

UAC bypass

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" C:\Users\Admin\AppData\Local\Temp\3f1a620f0fda6d8f7f62a458a887178d_JaffaCakes118.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

Enumerates physical storage devices

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000_Classes\Local Settings C:\Users\Admin\AppData\Local\Temp\3f1a620f0fda6d8f7f62a458a887178d_JaffaCakes118.exe N/A
Key created \REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000_Classes\Local Settings C:\Windows\system32\OpenWith.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\system32\OpenWith.exe N/A

System policy modification

evasion
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" C:\Users\Admin\AppData\Local\Temp\3f1a620f0fda6d8f7f62a458a887178d_JaffaCakes118.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\3f1a620f0fda6d8f7f62a458a887178d_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\3f1a620f0fda6d8f7f62a458a887178d_JaffaCakes118.exe"

C:\Windows\system32\OpenWith.exe

C:\Windows\system32\OpenWith.exe -Embedding

Network

Country Destination Domain Proto
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
N/A 127.0.0.1:1865 tcp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
NL 23.62.61.113:443 www.bing.com tcp
US 8.8.8.8:53 113.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 71.159.190.20.in-addr.arpa udp
NL 23.62.61.113:443 www.bing.com tcp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 142.53.16.96.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 udp

Files

memory/512-0-0x0000000000400000-0x000000000090F000-memory.dmp

memory/512-1-0x0000000000970000-0x0000000000971000-memory.dmp

memory/512-6-0x0000000000400000-0x000000000090F000-memory.dmp