Malware Analysis Report

2025-04-14 05:06

Sample ID 230120-e6lqeagf31
Target ss.ps1
SHA256 6c1e62385d660ca43e024d461154fbb4805e429cdf7850d19510d7f69533739e
Tags
quasar office04 spyware trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

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
10/10

SHA256

6c1e62385d660ca43e024d461154fbb4805e429cdf7850d19510d7f69533739e

Threat Level: Known bad

The file ss.ps1 was found to be: Known bad.

Malicious Activity Summary

quasar office04 spyware trojan

Quasar RAT

Quasar payload

Looks up external IP address via web service

Suspicious use of SetThreadContext

Suspicious use of AdjustPrivilegeToken

Creates scheduled task(s)

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-01-20 04:33

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-01-20 04:33

Reported

2023-01-20 04:35

Platform

win7-20221111-en

Max time kernel

27s

Max time network

30s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\ss.ps1

Signatures

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Processes

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\ss.ps1

Network

N/A

Files

memory/840-54-0x000007FEFB5B1000-0x000007FEFB5B3000-memory.dmp

memory/840-55-0x000007FEF3170000-0x000007FEF3B93000-memory.dmp

memory/840-56-0x000007FEF2610000-0x000007FEF316D000-memory.dmp

memory/840-57-0x0000000002724000-0x0000000002727000-memory.dmp

memory/840-58-0x000000000272B000-0x000000000274A000-memory.dmp

memory/840-59-0x0000000002724000-0x0000000002727000-memory.dmp

memory/840-60-0x000000000272B000-0x000000000274A000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-01-20 04:33

Reported

2023-01-20 04:35

Platform

win10v2004-20220901-en

Max time kernel

91s

Max time network

152s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\ss.ps1

Signatures

Quasar RAT

trojan spyware quasar

Quasar payload

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Looks up external IP address via web service

Description Indicator Process Target
N/A api.ipify.org N/A N/A
N/A api.ipify.org N/A N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4032 set thread context of 3532 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

Creates scheduled task(s)

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

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4032 wrote to memory of 3532 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4032 wrote to memory of 3532 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4032 wrote to memory of 3532 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4032 wrote to memory of 3532 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4032 wrote to memory of 3532 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4032 wrote to memory of 3532 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4032 wrote to memory of 3532 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4032 wrote to memory of 3532 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 3532 wrote to memory of 220 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 3532 wrote to memory of 220 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 3532 wrote to memory of 220 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe

Processes

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\ss.ps1

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"

C:\Windows\SysWOW64\schtasks.exe

"schtasks" /create /tn "Update" /sc ONLOGON /tr "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe" /rl HIGHEST /f

Network

Country Destination Domain Proto
N/A 8.8.8.8:53 ghcc.duckdns.org udp
N/A 95.216.102.32:4782 ghcc.duckdns.org tcp
N/A 8.8.8.8:53 tools.keycdn.com udp
N/A 185.172.148.96:443 tools.keycdn.com tcp
N/A 8.8.8.8:53 api.ipify.org udp
N/A 64.185.227.155:443 api.ipify.org tcp
N/A 20.50.80.209:443 tcp
N/A 2.18.109.224:443 tcp
N/A 93.184.221.240:80 tcp
N/A 93.184.221.240:80 tcp
N/A 93.184.221.240:80 tcp

Files

memory/4032-132-0x0000029F425D0000-0x0000029F425F2000-memory.dmp

memory/4032-133-0x00007FF834C30000-0x00007FF8356F1000-memory.dmp

memory/3532-135-0x000000000047E74E-mapping.dmp

memory/4032-136-0x00007FF834C30000-0x00007FF8356F1000-memory.dmp

memory/3532-137-0x0000000000520000-0x00000000005A4000-memory.dmp

memory/3532-138-0x0000000004FB0000-0x0000000005554000-memory.dmp

memory/3532-139-0x0000000004AA0000-0x0000000004B32000-memory.dmp

memory/3532-140-0x0000000004A80000-0x0000000004A8A000-memory.dmp

memory/220-141-0x0000000000000000-mapping.dmp

memory/3532-142-0x0000000006080000-0x0000000006698000-memory.dmp

memory/3532-143-0x0000000005B30000-0x0000000005B80000-memory.dmp

memory/3532-144-0x0000000005DA0000-0x0000000005E52000-memory.dmp

memory/3532-145-0x0000000006F90000-0x0000000006FF6000-memory.dmp