Malware Analysis Report

2025-04-14 05:06

Sample ID 230119-shf2xadc5w
Target l1yprr.ps1
SHA256 6f890fdcdb5267b92b3b793ff8b17484bc1a6a4107a68f2b4282d386225b63f1
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

6f890fdcdb5267b92b3b793ff8b17484bc1a6a4107a68f2b4282d386225b63f1

Threat Level: Known bad

The file l1yprr.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 behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Creates scheduled task(s)

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-01-19 15:07

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-01-19 15:07

Reported

2023-01-19 15:09

Platform

win7-20220812-en

Max time kernel

42s

Max time network

45s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\l1yprr.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\l1yprr.ps1

Network

N/A

Files

memory/1584-54-0x000007FEFBE61000-0x000007FEFBE63000-memory.dmp

memory/1584-55-0x000007FEF44C0000-0x000007FEF4EE3000-memory.dmp

memory/1584-56-0x000007FEF3960000-0x000007FEF44BD000-memory.dmp

memory/1584-57-0x00000000026F4000-0x00000000026F7000-memory.dmp

memory/1584-58-0x00000000026F4000-0x00000000026F7000-memory.dmp

memory/1584-59-0x00000000026FB000-0x000000000271A000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-01-19 15:07

Reported

2023-01-19 15:09

Platform

win10v2004-20221111-en

Max time kernel

107s

Max time network

141s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\l1yprr.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 1980 set thread context of 2668 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 1980 wrote to memory of 2668 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1980 wrote to memory of 2668 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1980 wrote to memory of 2668 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1980 wrote to memory of 2668 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1980 wrote to memory of 2668 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1980 wrote to memory of 2668 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1980 wrote to memory of 2668 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1980 wrote to memory of 2668 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2668 wrote to memory of 404 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 2668 wrote to memory of 404 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 2668 wrote to memory of 404 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\l1yprr.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 93.184.221.240:80 tcp
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 52.182.143.211:443 tcp
N/A 104.80.225.205:443 tcp
N/A 93.184.221.240:80 tcp
N/A 93.184.221.240:80 tcp
N/A 87.248.202.1:80 tcp

Files

memory/1980-132-0x00000276B52F0000-0x00000276B5312000-memory.dmp

memory/1980-133-0x00007FFA4A0B0000-0x00007FFA4AB71000-memory.dmp

memory/2668-135-0x000000000047E77E-mapping.dmp

memory/1980-136-0x00007FFA4A0B0000-0x00007FFA4AB71000-memory.dmp

memory/2668-137-0x0000000000500000-0x0000000000584000-memory.dmp

memory/2668-138-0x0000000004F20000-0x00000000054C4000-memory.dmp

memory/2668-139-0x0000000004A40000-0x0000000004AD2000-memory.dmp

memory/2668-140-0x0000000004CD0000-0x0000000004CDA000-memory.dmp

memory/404-141-0x0000000000000000-mapping.dmp

memory/2668-142-0x0000000006130000-0x0000000006748000-memory.dmp

memory/2668-143-0x0000000005BF0000-0x0000000005C40000-memory.dmp

memory/2668-144-0x0000000005E60000-0x0000000005F12000-memory.dmp

memory/2668-145-0x0000000006F00000-0x0000000006F66000-memory.dmp