Malware Analysis Report

2025-01-18 21:26

Sample ID 240321-yvpsgaaf7y
Target dc8160106097e3a035b7a39f410e7093
SHA256 c6fd39c0beda2e8993a43d6b1da515de0d43e917dcb9c39bdf959043bc5022d2
Tags
aspackv2 adware 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

c6fd39c0beda2e8993a43d6b1da515de0d43e917dcb9c39bdf959043bc5022d2

Threat Level: Shows suspicious behavior

The file dc8160106097e3a035b7a39f410e7093 was found to be: Shows suspicious behavior.

Malicious Activity Summary

aspackv2 adware persistence stealer

ASPack v2.12-2.42

Adds Run key to start application

Installs/modifies Browser Helper Object

Unsigned PE

Modifies registry class

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-03-21 20:06

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 20:06

Reported

2024-03-21 20:09

Platform

win7-20240220-en

Max time kernel

121s

Max time network

126s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\dc8160106097e3a035b7a39f410e7093.dll

Signatures

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\{7495af95-0324-aad3-b859-4a244b0ffec9} = "C:\\Windows\\System32\\Rundll32.exe \"C:\\Users\\Admin\\AppData\\Local\\Temp\\dc8160106097e3a035b7a39f410e7093.dll\" DllInit" C:\Windows\SysWOW64\regsvr32.exe N/A

Installs/modifies Browser Helper Object

stealer adware
Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{f680ca5b-3062-ce5d-9774-bcf4d83f73d7} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{f680ca5b-3062-ce5d-9774-bcf4d83f73d7}\NoExplorer = "\"\"" C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{f680ca5b-3062-ce5d-9774-bcf4d83f73d7}\InProcServer32 C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{f680ca5b-3062-ce5d-9774-bcf4d83f73d7}\InProcServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\dc8160106097e3a035b7a39f410e7093.dll" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{f680ca5b-3062-ce5d-9774-bcf4d83f73d7}\InProcServer32\ThreadingModel = "Apartment" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{f680ca5b-3062-ce5d-9774-bcf4d83f73d7} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{f680ca5b-3062-ce5d-9774-bcf4d83f73d7}\ = "superiorads browser optimizer" C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1348 wrote to memory of 1740 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1348 wrote to memory of 1740 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1348 wrote to memory of 1740 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1348 wrote to memory of 1740 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1348 wrote to memory of 1740 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1348 wrote to memory of 1740 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1348 wrote to memory of 1740 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\dc8160106097e3a035b7a39f410e7093.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\dc8160106097e3a035b7a39f410e7093.dll

Network

N/A

Files

memory/1740-0-0x0000000010000000-0x000000001005C000-memory.dmp

memory/1740-1-0x00000000003E0000-0x000000000043A000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-21 20:06

Reported

2024-03-21 20:09

Platform

win10v2004-20240226-en

Max time kernel

151s

Max time network

157s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\dc8160106097e3a035b7a39f410e7093.dll

Signatures

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\{1ac7084b-d879-d329-149c-f41c44104d84} = "C:\\Windows\\System32\\Rundll32.exe \"C:\\Users\\Admin\\AppData\\Local\\Temp\\dc8160106097e3a035b7a39f410e7093.dll\" DllInit" C:\Windows\SysWOW64\regsvr32.exe N/A

Installs/modifies Browser Helper Object

stealer adware
Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{4a5b47b4-1a25-404c-0b5f-c1cfdfc3efd9} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{4a5b47b4-1a25-404c-0b5f-c1cfdfc3efd9}\NoExplorer = "\"\"" C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4a5b47b4-1a25-404c-0b5f-c1cfdfc3efd9}\InProcServer32\ThreadingModel = "Apartment" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4a5b47b4-1a25-404c-0b5f-c1cfdfc3efd9} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4a5b47b4-1a25-404c-0b5f-c1cfdfc3efd9}\ = "superiorads browser optimizer" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4a5b47b4-1a25-404c-0b5f-c1cfdfc3efd9}\InProcServer32 C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4a5b47b4-1a25-404c-0b5f-c1cfdfc3efd9}\InProcServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\dc8160106097e3a035b7a39f410e7093.dll" C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2196 wrote to memory of 2140 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2196 wrote to memory of 2140 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2196 wrote to memory of 2140 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\dc8160106097e3a035b7a39f410e7093.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\dc8160106097e3a035b7a39f410e7093.dll

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4108 --field-trial-handle=2264,i,15001568551143786084,90255922961447677,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 75.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 173.178.17.96.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 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.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 13.107.246.64:443 tcp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 56.179.17.96.in-addr.arpa udp
US 8.8.8.8:53 69.179.17.96.in-addr.arpa udp
US 8.8.8.8:53 30.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.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 204.79.197.200:443 tse1.mm.bing.net tcp

Files

memory/2140-0-0x0000000010000000-0x000000001005C000-memory.dmp

memory/2140-1-0x00000000021A0000-0x00000000021FA000-memory.dmp