Malware Analysis Report

2025-08-05 21:21

Sample ID 240305-a7r7csad48
Target b35df2b5bfd716d04d9e73f29d33cfb4
SHA256 17e75d26155509f37f0309982ad4ed831df19bb3b61b4b10851ce520487619e6
Tags
aspackv2 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

17e75d26155509f37f0309982ad4ed831df19bb3b61b4b10851ce520487619e6

Threat Level: Shows suspicious behavior

The file b35df2b5bfd716d04d9e73f29d33cfb4 was found to be: Shows suspicious behavior.

Malicious Activity Summary

aspackv2 persistence

ASPack v2.12-2.42

Adds Run key to start application

Drops file in System32 directory

Drops file in Windows directory

Unsigned PE

Enumerates physical storage devices

Creates scheduled task(s)

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-03-05 00:51

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

2024-03-05 00:51

Reported

2024-03-05 00:54

Platform

win7-20240221-en

Max time kernel

142s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe"

Signatures

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\systen32 = "C:\\Windows\\system32\\systen32.exe" C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\systen32.exe C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe N/A
File opened for modification C:\Windows\SysWOW64\systen32.exe C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\reg_88448888.txt C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe N/A

Enumerates physical storage devices

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\schtasks.exe N/A

Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe

"C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe"

C:\Windows\SysWOW64\schtasks.exe

schtasks /create /tn startt /tr c:\start.bat /sc onstart /ru system

Network

Country Destination Domain Proto
US 8.8.8.8:53 gsmtp185.google.com udp

Files

memory/1640-0-0x0000000000230000-0x0000000000231000-memory.dmp

memory/1640-3-0x0000000000400000-0x000000000231A000-memory.dmp

memory/1640-4-0x0000000000400000-0x000000000231A000-memory.dmp

memory/1640-5-0x0000000000230000-0x0000000000231000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-05 00:51

Reported

2024-03-05 00:54

Platform

win10v2004-20240226-en

Max time kernel

142s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe"

Signatures

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\systen32 = "C:\\Windows\\system32\\systen32.exe" C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\systen32.exe C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe N/A
File opened for modification C:\Windows\SysWOW64\systen32.exe C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\reg_88448888.txt C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe N/A

Enumerates physical storage devices

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\schtasks.exe N/A

Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe

"C:\Users\Admin\AppData\Local\Temp\b35df2b5bfd716d04d9e73f29d33cfb4.exe"

C:\Windows\SysWOW64\schtasks.exe

schtasks /create /tn startt /tr c:\start.bat /sc onstart /ru system

Network

Country Destination Domain Proto
US 8.8.8.8:53 gsmtp185.google.com udp
US 8.8.8.8:53 17.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 173.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
NL 52.142.223.178:80 tcp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 104.241.123.92.in-addr.arpa udp
US 8.8.8.8:53 119.110.54.20.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 176.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 32.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 209.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 211.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 23.236.111.52.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/4964-0-0x00000000040E0000-0x00000000040E1000-memory.dmp

memory/4964-3-0x0000000000400000-0x000000000231A000-memory.dmp

memory/4964-5-0x00000000040E0000-0x00000000040E1000-memory.dmp