Malware Analysis Report

2025-04-14 05:06

Sample ID 230119-y5qshsec6s
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 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

Creates scheduled task(s)

Suspicious use of SetWindowsHookEx

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-01-19 20:22

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-01-19 20:22

Reported

2023-01-19 20:23

Platform

win10-20220812-en

Max time kernel

27s

Max time network

34s

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 2500 set thread context of 4896 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 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 2500 wrote to memory of 4896 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2500 wrote to memory of 4896 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2500 wrote to memory of 4896 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2500 wrote to memory of 4896 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2500 wrote to memory of 4896 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2500 wrote to memory of 4896 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2500 wrote to memory of 4896 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2500 wrote to memory of 4896 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4896 wrote to memory of 4932 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 4896 wrote to memory of 4932 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 4896 wrote to memory of 4932 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 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 13.69.109.131:443 tcp

Files

memory/2500-122-0x000001F134840000-0x000001F134862000-memory.dmp

memory/2500-127-0x000001F1349F0000-0x000001F134A66000-memory.dmp

memory/2500-130-0x000001F134C20000-0x000001F135000000-memory.dmp

memory/2500-131-0x000001F134A70000-0x000001F134B0C000-memory.dmp

memory/4896-138-0x0000000000400000-0x0000000000484000-memory.dmp

memory/4896-139-0x000000000047E77E-mapping.dmp

memory/4896-141-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-142-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-143-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-144-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-145-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-146-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-147-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-148-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-149-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-150-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-152-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-151-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-153-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-154-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-155-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-157-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-156-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-158-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-159-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-160-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-161-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-162-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-163-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-164-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-166-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-167-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-168-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-169-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-170-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-171-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-172-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-173-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-165-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-174-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-175-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-176-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-178-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-177-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-180-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-179-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-181-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-182-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-183-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-184-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-185-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-186-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-187-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-188-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-189-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-190-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-191-0x0000000005D10000-0x000000000620E000-memory.dmp

memory/4896-192-0x00000000058B0000-0x0000000005942000-memory.dmp

memory/4896-193-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-194-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-195-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-196-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-197-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-198-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-199-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-200-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-201-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-202-0x0000000005810000-0x000000000581A000-memory.dmp

memory/4896-203-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-204-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-205-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4932-206-0x0000000000000000-mapping.dmp

memory/4932-207-0x0000000077580000-0x000000007770E000-memory.dmp

memory/4896-225-0x0000000006B20000-0x0000000007126000-memory.dmp

memory/4896-227-0x00000000065E0000-0x0000000006630000-memory.dmp

memory/4896-228-0x0000000006830000-0x00000000068E2000-memory.dmp

memory/4896-256-0x0000000007BE0000-0x0000000007C46000-memory.dmp