Malware Analysis Report

2025-08-05 21:21

Sample ID 240305-c3cbfsda38
Target b076bcb501485446eb9cdb450e4714a6.bin
SHA256 c69c2902135acc0c8511418682b3d0685c5b29f9ef2312d4775f25260bfbbc0d
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

c69c2902135acc0c8511418682b3d0685c5b29f9ef2312d4775f25260bfbbc0d

Threat Level: Shows suspicious behavior

The file b076bcb501485446eb9cdb450e4714a6.bin was found to be: Shows suspicious behavior.

Malicious Activity Summary

aspackv2 persistence

ASPack v2.12-2.42

Modifies WinLogon

Drops file in Windows directory

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-03-05 02:35

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 02:35

Reported

2024-03-05 02:38

Platform

win7-20240221-en

Max time kernel

118s

Max time network

119s

Command Line

winlogon.exe

Signatures

Modifies WinLogon

persistence
Description Indicator Process Target
Key created \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\BITS C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\BITS C:\Windows\SysWOW64\rundll32.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\259394858.dat C:\Windows\SysWOW64\rundll32.exe N/A
File created C:\Windows\259394905.dat C:\Windows\SysWOW64\rundll32.exe N/A
File created C:\Windows\259394952.dat C:\Windows\SysWOW64\rundll32.exe N/A
File created C:\Windows\help\nishiernai.dll C:\Windows\SysWOW64\rundll32.exe N/A
File opened for modification C:\Windows\help\nishiernai.dll C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeRestorePrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A

Processes

C:\Windows\system32\winlogon.exe

winlogon.exe

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b076bcb501485446eb9cdb450e4714a6.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b076bcb501485446eb9cdb450e4714a6.dll,#1

Network

N/A

Files

memory/2964-0-0x0000000000160000-0x00000000001DE000-memory.dmp

memory/2964-1-0x0000000000160000-0x00000000001DE000-memory.dmp

memory/2964-2-0x00000000004D0000-0x000000000054E000-memory.dmp

memory/2964-3-0x00000000004D0000-0x000000000054E000-memory.dmp

memory/2964-4-0x0000000001E70000-0x0000000001ECB000-memory.dmp

memory/2964-5-0x0000000000170000-0x0000000000171000-memory.dmp

memory/2964-6-0x0000000000180000-0x0000000000181000-memory.dmp

memory/2964-9-0x0000000002410000-0x0000000002411000-memory.dmp

memory/2964-8-0x00000000024C0000-0x00000000024C1000-memory.dmp

memory/2964-7-0x0000000001ED0000-0x0000000001ED1000-memory.dmp

memory/2964-10-0x0000000003190000-0x0000000003191000-memory.dmp

memory/2964-16-0x0000000003140000-0x0000000003142000-memory.dmp

memory/2964-15-0x0000000003300000-0x0000000003301000-memory.dmp

memory/2964-14-0x0000000003310000-0x0000000003311000-memory.dmp

memory/2964-13-0x00000000031A0000-0x00000000031A1000-memory.dmp

memory/2964-12-0x00000000031B0000-0x00000000031B1000-memory.dmp

memory/2964-11-0x0000000002570000-0x0000000002571000-memory.dmp

memory/436-18-0x000000007FFF0000-0x000000007FFF1000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-05 02:35

Reported

2024-03-05 02:38

Platform

win10v2004-20240226-en

Max time kernel

147s

Max time network

154s

Command Line

winlogon.exe

Signatures

Modifies WinLogon

persistence
Description Indicator Process Target
Key created \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\BITS C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\BITS C:\Windows\SysWOW64\rundll32.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\240634203.dat C:\Windows\SysWOW64\rundll32.exe N/A
File created C:\Windows\240634390.dat C:\Windows\SysWOW64\rundll32.exe N/A
File created C:\Windows\240634640.dat C:\Windows\SysWOW64\rundll32.exe N/A
File created C:\Windows\help\nishiernai.dll C:\Windows\SysWOW64\rundll32.exe N/A
File opened for modification C:\Windows\help\nishiernai.dll C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeRestorePrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3568 wrote to memory of 2320 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3568 wrote to memory of 2320 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3568 wrote to memory of 2320 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2320 wrote to memory of 584 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\system32\winlogon.exe

Processes

C:\Windows\system32\winlogon.exe

winlogon.exe

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b076bcb501485446eb9cdb450e4714a6.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b076bcb501485446eb9cdb450e4714a6.dll,#1

Network

Country Destination Domain Proto
US 8.8.8.8:53 180.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 75.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.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 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 209.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 7.173.189.20.in-addr.arpa udp

Files

memory/2320-0-0x0000000000400000-0x000000000047E000-memory.dmp

memory/2320-1-0x0000000002610000-0x000000000266B000-memory.dmp

memory/2320-2-0x0000000002880000-0x0000000002881000-memory.dmp

memory/2320-4-0x0000000002850000-0x0000000002851000-memory.dmp

memory/2320-3-0x0000000002870000-0x0000000002871000-memory.dmp

memory/2320-7-0x0000000002810000-0x0000000002811000-memory.dmp

memory/2320-5-0x0000000002830000-0x0000000002831000-memory.dmp

memory/2320-6-0x00000000027F0000-0x00000000027F1000-memory.dmp

memory/2320-8-0x0000000003680000-0x0000000003681000-memory.dmp

memory/2320-9-0x0000000003670000-0x0000000003672000-memory.dmp

memory/2320-10-0x00000000036C0000-0x00000000036C1000-memory.dmp

memory/2320-11-0x00000000027E0000-0x00000000027E1000-memory.dmp

memory/2320-12-0x0000000002890000-0x0000000002891000-memory.dmp

memory/2320-13-0x0000000000AF0000-0x0000000000AF1000-memory.dmp

memory/2320-14-0x0000000000B00000-0x0000000000B01000-memory.dmp

memory/2320-15-0x0000000003690000-0x0000000003691000-memory.dmp

memory/2320-16-0x00000000029F0000-0x00000000029F1000-memory.dmp

memory/2320-17-0x0000000002940000-0x0000000002941000-memory.dmp

memory/2320-18-0x0000000002AA0000-0x0000000002AA1000-memory.dmp

memory/2320-19-0x00000000036E0000-0x00000000036E1000-memory.dmp

memory/2320-20-0x00000000036D0000-0x00000000036D1000-memory.dmp

memory/2320-21-0x0000000003840000-0x0000000003841000-memory.dmp

memory/2320-22-0x0000000003830000-0x0000000003831000-memory.dmp

memory/2320-23-0x0000000003870000-0x0000000003871000-memory.dmp

memory/2320-24-0x00000000038A0000-0x00000000038A1000-memory.dmp

memory/2320-25-0x0000000003A60000-0x0000000003A61000-memory.dmp

memory/2320-26-0x0000000003A90000-0x0000000003A91000-memory.dmp

memory/2320-27-0x0000000003A80000-0x0000000003A81000-memory.dmp

memory/2320-28-0x0000000003DF0000-0x0000000003DF1000-memory.dmp

memory/2320-29-0x0000000003DE0000-0x0000000003DE1000-memory.dmp

memory/2320-30-0x0000000003E90000-0x0000000003E91000-memory.dmp

memory/2320-31-0x0000000003890000-0x0000000003891000-memory.dmp

memory/2320-32-0x00000000038B0000-0x00000000038B1000-memory.dmp

memory/2320-33-0x0000000003A70000-0x0000000003A71000-memory.dmp

memory/2320-34-0x0000000003EA0000-0x0000000003EA1000-memory.dmp

memory/2320-35-0x0000000003EC0000-0x0000000003EC1000-memory.dmp

memory/2320-36-0x0000000003EB0000-0x0000000003EB1000-memory.dmp

memory/2320-38-0x0000000003EE0000-0x0000000003EE1000-memory.dmp

memory/2320-39-0x0000000003ED0000-0x0000000003ED1000-memory.dmp

memory/2320-40-0x0000000003F10000-0x0000000003F11000-memory.dmp

memory/2320-41-0x0000000004030000-0x0000000004031000-memory.dmp

memory/2320-42-0x0000000004050000-0x0000000004051000-memory.dmp

memory/2320-43-0x0000000004080000-0x0000000004081000-memory.dmp

memory/2320-44-0x0000000004090000-0x0000000004091000-memory.dmp

memory/2320-45-0x0000000004040000-0x0000000004041000-memory.dmp