Malware Analysis Report

2025-03-15 05:48

Sample ID 240623-3tyq7sscql
Target 049e27dfd2b583e8ac25e8de3ac28498_JaffaCakes118
SHA256 d11022e0aa9793ba109f636ca11375dc304bb225508ce0dde72bd3147765b0de
Tags
aspackv2 bootkit 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

d11022e0aa9793ba109f636ca11375dc304bb225508ce0dde72bd3147765b0de

Threat Level: Shows suspicious behavior

The file 049e27dfd2b583e8ac25e8de3ac28498_JaffaCakes118 was found to be: Shows suspicious behavior.

Malicious Activity Summary

aspackv2 bootkit persistence

ASPack v2.12-2.42

Writes to the Master Boot Record (MBR)

Unsigned PE

Modifies registry class

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-23 23:48

Signatures

ASPack v2.12-2.42

aspackv2
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

2024-06-23 23:48

Reported

2024-06-23 23:51

Platform

win7-20240611-en

Max time kernel

119s

Max time network

124s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\049e27dfd2b583e8ac25e8de3ac28498_JaffaCakes118.dll

Signatures

Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PhysicalDrive0 C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.key\ C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.key\ = "regfile" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{13539089-270A-449C-8C6F-DEEBDA8C2A2E}\1.0\FLAGS C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{13539089-270A-449C-8C6F-DEEBDA8C2A2E}\1.0\HELPDIR\ = "C:\\Users\\Admin\\AppData\\Local\\Temp" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{13539089-270A-449C-8C6F-DEEBDA8C2A2E}\1.0\FLAGS\ = "0" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{13539089-270A-449C-8C6F-DEEBDA8C2A2E}\1.0\0 C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{13539089-270A-449C-8C6F-DEEBDA8C2A2E}\1.0\HELPDIR C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.key C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{13539089-270A-449C-8C6F-DEEBDA8C2A2E}\1.0\0\win32 C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{13539089-270A-449C-8C6F-DEEBDA8C2A2E} C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{13539089-270A-449C-8C6F-DEEBDA8C2A2E}\1.0 C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{13539089-270A-449C-8C6F-DEEBDA8C2A2E}\1.0\ = "loader_c 1.0 Type Library" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{13539089-270A-449C-8C6F-DEEBDA8C2A2E}\1.0\0\win32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\049e27dfd2b583e8ac25e8de3ac28498_JaffaCakes118.dll" C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3040 wrote to memory of 2156 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 3040 wrote to memory of 2156 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 3040 wrote to memory of 2156 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 3040 wrote to memory of 2156 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 3040 wrote to memory of 2156 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 3040 wrote to memory of 2156 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 3040 wrote to memory of 2156 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe

Processes

C:\Windows\system32\regsvr32.exe

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\049e27dfd2b583e8ac25e8de3ac28498_JaffaCakes118.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\049e27dfd2b583e8ac25e8de3ac28498_JaffaCakes118.dll

Network

N/A

Files

memory/2156-0-0x0000000010000000-0x0000000010035000-memory.dmp

memory/2156-1-0x00000000002E0000-0x0000000000310000-memory.dmp

memory/2156-2-0x0000000000230000-0x0000000000233000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-23 23:48

Reported

2024-06-23 23:51

Platform

win10v2004-20240611-en

Max time kernel

150s

Max time network

151s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\049e27dfd2b583e8ac25e8de3ac28498_JaffaCakes118.dll

Signatures

Modifies registry class

Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.key\ C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.key\ = "regfile" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.key C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{13539089-270A-449C-8C6F-DEEBDA8C2A2E}\1.0\HELPDIR C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{13539089-270A-449C-8C6F-DEEBDA8C2A2E}\1.0\HELPDIR\ = "C:\\Users\\Admin\\AppData\\Local\\Temp" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{13539089-270A-449C-8C6F-DEEBDA8C2A2E}\1.0 C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{13539089-270A-449C-8C6F-DEEBDA8C2A2E}\1.0\FLAGS C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{13539089-270A-449C-8C6F-DEEBDA8C2A2E}\1.0\0 C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{13539089-270A-449C-8C6F-DEEBDA8C2A2E} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{13539089-270A-449C-8C6F-DEEBDA8C2A2E}\1.0\FLAGS\ = "0" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{13539089-270A-449C-8C6F-DEEBDA8C2A2E}\1.0\0\win32 C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{13539089-270A-449C-8C6F-DEEBDA8C2A2E}\1.0\0\win32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\049e27dfd2b583e8ac25e8de3ac28498_JaffaCakes118.dll" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{13539089-270A-449C-8C6F-DEEBDA8C2A2E}\1.0\ = "loader_c 1.0 Type Library" C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 760 wrote to memory of 3436 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 760 wrote to memory of 3436 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 760 wrote to memory of 3436 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe

Processes

C:\Windows\system32\regsvr32.exe

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\049e27dfd2b583e8ac25e8de3ac28498_JaffaCakes118.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\049e27dfd2b583e8ac25e8de3ac28498_JaffaCakes118.dll

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 13.107.21.237:443 g.bing.com tcp
BE 2.17.107.105:443 www.bing.com tcp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 2.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 105.107.17.2.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 45.19.74.20.in-addr.arpa udp
US 8.8.8.8:53 10.28.171.150.in-addr.arpa udp
US 8.8.8.8:53 udp

Files

memory/3436-0-0x0000000010000000-0x0000000010035000-memory.dmp

memory/3436-1-0x000000001001A000-0x000000001001B000-memory.dmp

memory/3436-2-0x0000000010000000-0x0000000010035000-memory.dmp

memory/3436-3-0x0000000010000000-0x0000000010035000-memory.dmp

memory/3436-4-0x0000000010000000-0x0000000010035000-memory.dmp