Malware Analysis Report

2025-01-18 21:34

Sample ID 240415-f8lnvsfh29
Target f06d4070ca1ac7e701c707d4f8eae2b2_JaffaCakes118
SHA256 ba1a88adebaf8ecf7bb68fdfbba2f31cac0f07c6ce80e69d88b086c8e504addb
Tags
aspackv2 adware bootkit persistence 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

ba1a88adebaf8ecf7bb68fdfbba2f31cac0f07c6ce80e69d88b086c8e504addb

Threat Level: Shows suspicious behavior

The file f06d4070ca1ac7e701c707d4f8eae2b2_JaffaCakes118 was found to be: Shows suspicious behavior.

Malicious Activity Summary

aspackv2 adware bootkit persistence stealer

ASPack v2.12-2.42

Installs/modifies Browser Helper Object

Writes to the Master Boot Record (MBR)

Unsigned PE

Modifies registry class

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-15 05:32

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

2024-04-15 05:32

Reported

2024-04-15 05:35

Platform

win7-20231129-en

Max time kernel

119s

Max time network

119s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\f06d4070ca1ac7e701c707d4f8eae2b2_JaffaCakes118.dll

Signatures

Installs/modifies Browser Helper Object

stealer adware
Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{7AFD00B9-30B5-43A5-B3D6-E42849B6016B} C:\Windows\SysWOW64\regsvr32.exe N/A

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\Wow6432Node\CLSID\{7AFD00B9-30B5-43A5-B3D6-E42849B6016B}\InprocServer32\ThreadingModel = "Apartment" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7AFD00B9-30B5-43A5-B3D6-E42849B6016B}\ProgID\ = "f06d4070ca1ac7e701c707d4f8eae2b2_JaffaCakes118.AAAAA" 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\Wow6432Node\CLSID\{7AFD00B9-30B5-43A5-B3D6-E42849B6016B} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7AFD00B9-30B5-43A5-B3D6-E42849B6016B}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\f06d4070ca1ac7e701c707d4f8eae2b2_JaffaCakes118.dll" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7AFD00B9-30B5-43A5-B3D6-E42849B6016B}\InprocServer32 C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\f06d4070ca1ac7e701c707d4f8eae2b2_JaffaCakes118.AAAAA C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\f06d4070ca1ac7e701c707d4f8eae2b2_JaffaCakes118.AAAAA\ = "CCCCCCC" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7AFD00B9-30B5-43A5-B3D6-E42849B6016B}\ProgID C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.key\ = "regfile" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7AFD00B9-30B5-43A5-B3D6-E42849B6016B}\ = "CCCCCCC" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\f06d4070ca1ac7e701c707d4f8eae2b2_JaffaCakes118.AAAAA\Clsid\ = "{7AFD00B9-30B5-43A5-B3D6-E42849B6016B}" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.key\ C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\f06d4070ca1ac7e701c707d4f8eae2b2_JaffaCakes118.AAAAA\Clsid C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1108 wrote to memory of 2196 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1108 wrote to memory of 2196 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1108 wrote to memory of 2196 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1108 wrote to memory of 2196 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1108 wrote to memory of 2196 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1108 wrote to memory of 2196 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1108 wrote to memory of 2196 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\f06d4070ca1ac7e701c707d4f8eae2b2_JaffaCakes118.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\f06d4070ca1ac7e701c707d4f8eae2b2_JaffaCakes118.dll

Network

N/A

Files

memory/2196-0-0x000000003BAF0000-0x000000003BC58000-memory.dmp

memory/2196-1-0x00000000004B0000-0x00000000004B2000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-15 05:32

Reported

2024-04-15 05:35

Platform

win10v2004-20240412-en

Max time kernel

135s

Max time network

140s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\f06d4070ca1ac7e701c707d4f8eae2b2_JaffaCakes118.dll

Signatures

Installs/modifies Browser Helper Object

stealer adware
Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{7AFD00B9-30B5-43A5-B3D6-E42849B6016B} C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\f06d4070ca1ac7e701c707d4f8eae2b2_JaffaCakes118.AAAAA\Clsid C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7AFD00B9-30B5-43A5-B3D6-E42849B6016B}\ProgID\ = "f06d4070ca1ac7e701c707d4f8eae2b2_JaffaCakes118.AAAAA" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7AFD00B9-30B5-43A5-B3D6-E42849B6016B} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7AFD00B9-30B5-43A5-B3D6-E42849B6016B}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\f06d4070ca1ac7e701c707d4f8eae2b2_JaffaCakes118.dll" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7AFD00B9-30B5-43A5-B3D6-E42849B6016B}\InprocServer32\ThreadingModel = "Apartment" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\f06d4070ca1ac7e701c707d4f8eae2b2_JaffaCakes118.AAAAA C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.key C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\f06d4070ca1ac7e701c707d4f8eae2b2_JaffaCakes118.AAAAA\Clsid\ = "{7AFD00B9-30B5-43A5-B3D6-E42849B6016B}" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7AFD00B9-30B5-43A5-B3D6-E42849B6016B}\ProgID C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.key\ = "regfile" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7AFD00B9-30B5-43A5-B3D6-E42849B6016B}\ = "CCCCCCC" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7AFD00B9-30B5-43A5-B3D6-E42849B6016B}\InprocServer32 C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.key\ C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\f06d4070ca1ac7e701c707d4f8eae2b2_JaffaCakes118.AAAAA\ = "CCCCCCC" C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4928 wrote to memory of 3876 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 4928 wrote to memory of 3876 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 4928 wrote to memory of 3876 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\f06d4070ca1ac7e701c707d4f8eae2b2_JaffaCakes118.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\f06d4070ca1ac7e701c707d4f8eae2b2_JaffaCakes118.dll

Network

Country Destination Domain Proto
US 8.8.8.8:53 0.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
NL 23.62.61.97:443 www.bing.com tcp
US 8.8.8.8:53 97.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 21.114.53.23.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 65.139.73.23.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 95.16.208.104.in-addr.arpa udp

Files

memory/3876-0-0x000000003BAF0000-0x000000003BC58000-memory.dmp

memory/3876-1-0x0000000002D70000-0x0000000002D72000-memory.dmp