Malware Analysis Report

2025-01-18 21:28

Sample ID 240321-x2dhcahf6y
Target dc69e797d7bc24e9d853072bcd44a078
SHA256 1776b7ca316d92112ac3791d4e90e03b69aded2ae98991000d4c6394452388bd
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

1776b7ca316d92112ac3791d4e90e03b69aded2ae98991000d4c6394452388bd

Threat Level: Shows suspicious behavior

The file dc69e797d7bc24e9d853072bcd44a078 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

2024-03-21 19:20

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

2024-03-21 19:20

Reported

2024-03-21 19:23

Platform

win7-20240221-en

Max time kernel

117s

Max time network

124s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\dc69e797d7bc24e9d853072bcd44a078.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\dc69e797d7bc24e9d853072bcd44a078.AAAAA\Clsid\ = "{7AFD00B9-30B5-43A5-B3D6-E42849B6016B}" 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\.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}\ = "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\Wow6432Node\CLSID\{7AFD00B9-30B5-43A5-B3D6-E42849B6016B}\InprocServer32\ThreadingModel = "Apartment" 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\dc69e797d7bc24e9d853072bcd44a078.AAAAA C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\dc69e797d7bc24e9d853072bcd44a078.AAAAA\ = "CCCCCCC" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\dc69e797d7bc24e9d853072bcd44a078.AAAAA\Clsid C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7AFD00B9-30B5-43A5-B3D6-E42849B6016B}\ProgID\ = "dc69e797d7bc24e9d853072bcd44a078.AAAAA" 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\\dc69e797d7bc24e9d853072bcd44a078.dll" 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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2300 wrote to memory of 2212 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2300 wrote to memory of 2212 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2300 wrote to memory of 2212 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2300 wrote to memory of 2212 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2300 wrote to memory of 2212 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2300 wrote to memory of 2212 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2300 wrote to memory of 2212 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\dc69e797d7bc24e9d853072bcd44a078.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\dc69e797d7bc24e9d853072bcd44a078.dll

Network

N/A

Files

memory/2212-0-0x000000003BAF0000-0x000000003BC59000-memory.dmp

memory/2212-1-0x00000000002B0000-0x00000000002B2000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-21 19:20

Reported

2024-03-21 19:23

Platform

win10v2004-20240226-en

Max time kernel

171s

Max time network

173s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\dc69e797d7bc24e9d853072bcd44a078.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\dc69e797d7bc24e9d853072bcd44a078.AAAAA C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\dc69e797d7bc24e9d853072bcd44a078.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\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\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\ = "dc69e797d7bc24e9d853072bcd44a078.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\WOW6432Node\CLSID\{7AFD00B9-30B5-43A5-B3D6-E42849B6016B}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\dc69e797d7bc24e9d853072bcd44a078.dll" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\dc69e797d7bc24e9d853072bcd44a078.AAAAA\ = "CCCCCCC" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\dc69e797d7bc24e9d853072bcd44a078.AAAAA\Clsid 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\WOW6432Node\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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2416 wrote to memory of 3776 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2416 wrote to memory of 3776 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2416 wrote to memory of 3776 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\dc69e797d7bc24e9d853072bcd44a078.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\dc69e797d7bc24e9d853072bcd44a078.dll

Network

Country Destination Domain Proto
US 8.8.8.8:53 68.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 210.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 52.111.229.48:443 tcp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 152.78.101.95.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 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 2.173.189.20.in-addr.arpa udp

Files

memory/3776-0-0x000000003BAF0000-0x000000003BC59000-memory.dmp

memory/3776-1-0x0000000002730000-0x0000000002732000-memory.dmp