Malware Analysis Report

2025-01-18 04:34

Sample ID 240108-lr7snagca3
Target Client.exe
SHA256 b474b5897b9d187e03a1eec0cde75b65d3d92566c05c0fec4beed484ceb7915a
Tags
office04 quasar spyware trojan
score
10/10

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
10/10

SHA256

b474b5897b9d187e03a1eec0cde75b65d3d92566c05c0fec4beed484ceb7915a

Threat Level: Known bad

The file Client.exe was found to be: Known bad.

Malicious Activity Summary

office04 quasar spyware trojan

Quasar RAT

Quasar family

Quasar payload

Executes dropped EXE

Unsigned PE

Creates scheduled task(s)

Uses Task Scheduler COM API

Runs ping.exe

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-01-08 09:47

Signatures

Quasar family

quasar

Quasar payload

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

2024-01-08 09:47

Reported

2024-01-08 09:49

Platform

win7-20231215-en

Command Line

N/A

Signatures

N/A

Processes

N/A

Network

N/A

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-01-08 09:47

Reported

2024-01-08 09:49

Platform

win10v2004-20231222-en

Max time kernel

2s

Max time network

65s

Command Line

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

Signatures

Quasar RAT

trojan spyware quasar

Quasar payload

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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Client.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f

C:\Windows\system32\PING.EXE

ping -n 10 localhost

C:\Windows\system32\chcp.com

chcp 65001

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\g0zabTVoF1mG.bat" "

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\ooNvgYlGvZZ3.bat" "

C:\Windows\system32\PING.EXE

ping -n 10 localhost

C:\Windows\system32\chcp.com

chcp 65001

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f

C:\Windows\system32\PING.EXE

ping -n 10 localhost

C:\Windows\system32\chcp.com

chcp 65001

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\hFS5OwoIn6Cy.bat" "

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f

C:\Windows\system32\PING.EXE

ping -n 10 localhost

C:\Windows\system32\chcp.com

chcp 65001

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\H3L7HH83vTDG.bat" "

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f

C:\Windows\system32\PING.EXE

ping -n 10 localhost

C:\Windows\system32\chcp.com

chcp 65001

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\yy5oOuvh7LwE.bat" "

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f

C:\Windows\system32\PING.EXE

ping -n 10 localhost

C:\Windows\system32\chcp.com

chcp 65001

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\54HALPxa1aMS.bat" "

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f

C:\Windows\system32\PING.EXE

ping -n 10 localhost

C:\Windows\system32\chcp.com

chcp 65001

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\viGTfqdpyGPZ.bat" "

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f

C:\Windows\system32\PING.EXE

ping -n 10 localhost

C:\Windows\system32\chcp.com

chcp 65001

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\XKI8f97RQmLs.bat" "

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f

C:\Windows\system32\PING.EXE

ping -n 10 localhost

C:\Windows\system32\chcp.com

chcp 65001

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\nVI6iDY6JS5U.bat" "

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f

C:\Windows\system32\PING.EXE

ping -n 10 localhost

C:\Windows\system32\chcp.com

chcp 65001

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\msbdrlgNBCuo.bat" "

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f

C:\Windows\system32\PING.EXE

ping -n 10 localhost

C:\Windows\system32\chcp.com

chcp 65001

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\QDd9k9a46kWf.bat" "

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f

C:\Windows\system32\PING.EXE

ping -n 10 localhost

C:\Windows\system32\chcp.com

chcp 65001

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\7Eeiu698HcXB.bat" "

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f

C:\Windows\system32\PING.EXE

ping -n 10 localhost

C:\Windows\system32\chcp.com

chcp 65001

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\vJ5I44Jl0JmB.bat" "

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f

C:\Windows\system32\PING.EXE

ping -n 10 localhost

C:\Windows\system32\chcp.com

chcp 65001

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\PVilWKj8caYZ.bat" "

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 22.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 146.78.124.51.in-addr.arpa udp
US 8.8.8.8:53 210.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 158.240.127.40.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
IE 20.54.110.119:443 tcp
US 8.8.8.8:53 119.110.54.20.in-addr.arpa udp
US 20.3.187.198:443 tcp
US 8.8.8.8:53 144.71.91.104.in-addr.arpa udp
US 8.8.8.8:53 174.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 64.134.221.88.in-addr.arpa udp

Files

memory/5016-0-0x0000000000B50000-0x0000000000E74000-memory.dmp

memory/5016-1-0x00007FF9D7B80000-0x00007FF9D8641000-memory.dmp

memory/5016-2-0x0000000002DE0000-0x0000000002DF0000-memory.dmp

memory/5016-10-0x00007FF9D7B80000-0x00007FF9D8641000-memory.dmp

memory/3916-11-0x000000001B930000-0x000000001B940000-memory.dmp

memory/3916-9-0x00007FF9D7B80000-0x00007FF9D8641000-memory.dmp

memory/3916-12-0x000000001B870000-0x000000001B8C0000-memory.dmp

memory/3916-13-0x000000001C1F0000-0x000000001C2A2000-memory.dmp

memory/3916-19-0x00007FF9D7B80000-0x00007FF9D8641000-memory.dmp

memory/2072-21-0x00007FF9D7340000-0x00007FF9D7E01000-memory.dmp

memory/2072-22-0x0000000000E00000-0x0000000000E10000-memory.dmp

memory/2072-27-0x00007FF9D7340000-0x00007FF9D7E01000-memory.dmp

memory/3576-29-0x00007FF9D7160000-0x00007FF9D7C21000-memory.dmp

memory/3576-30-0x000000001B140000-0x000000001B150000-memory.dmp

memory/3576-35-0x00007FF9D7160000-0x00007FF9D7C21000-memory.dmp

memory/4844-37-0x00007FF9D7160000-0x00007FF9D7C21000-memory.dmp

memory/4844-38-0x0000000002910000-0x0000000002920000-memory.dmp

memory/4844-43-0x00007FF9D7160000-0x00007FF9D7C21000-memory.dmp

memory/2828-45-0x00007FF9D7020000-0x00007FF9D7AE1000-memory.dmp

memory/2828-46-0x000000001B760000-0x000000001B770000-memory.dmp

memory/2828-51-0x00007FF9D7020000-0x00007FF9D7AE1000-memory.dmp

memory/2368-53-0x00007FF9D6B20000-0x00007FF9D75E1000-memory.dmp

memory/2368-54-0x0000000002EC0000-0x0000000002ED0000-memory.dmp

memory/2368-59-0x00007FF9D6B20000-0x00007FF9D75E1000-memory.dmp

memory/4876-62-0x000000001B380000-0x000000001B390000-memory.dmp

memory/4876-61-0x00007FF9D6B20000-0x00007FF9D75E1000-memory.dmp

memory/4876-67-0x00007FF9D6B20000-0x00007FF9D75E1000-memory.dmp

memory/3496-70-0x000000001B400000-0x000000001B410000-memory.dmp

memory/3496-69-0x00007FF9D6550000-0x00007FF9D7011000-memory.dmp

memory/3496-75-0x00007FF9D6550000-0x00007FF9D7011000-memory.dmp

memory/1488-78-0x0000000002EA0000-0x0000000002EB0000-memory.dmp

memory/1488-77-0x00007FF9D6BE0000-0x00007FF9D76A1000-memory.dmp

memory/1488-83-0x00007FF9D6BE0000-0x00007FF9D76A1000-memory.dmp

memory/1944-85-0x00007FF9D6C90000-0x00007FF9D7751000-memory.dmp

memory/1944-86-0x000000001B300000-0x000000001B310000-memory.dmp

memory/1944-91-0x00007FF9D6C90000-0x00007FF9D7751000-memory.dmp

memory/516-94-0x000000001B7D0000-0x000000001B7E0000-memory.dmp

memory/516-93-0x00007FF9D6C90000-0x00007FF9D7751000-memory.dmp

memory/516-99-0x00007FF9D6C90000-0x00007FF9D7751000-memory.dmp

memory/1072-101-0x00007FF9D6BE0000-0x00007FF9D76A1000-memory.dmp

memory/1072-102-0x00000000029B0000-0x00000000029C0000-memory.dmp

memory/1072-107-0x00007FF9D6BE0000-0x00007FF9D76A1000-memory.dmp

memory/4464-109-0x00007FF9D6C90000-0x00007FF9D7751000-memory.dmp

memory/4464-110-0x000000001BDF0000-0x000000001BE00000-memory.dmp

memory/4464-114-0x00007FF9D6C90000-0x00007FF9D7751000-memory.dmp

memory/2076-117-0x00007FF9D6C90000-0x00007FF9D7751000-memory.dmp

memory/2076-118-0x000000001BC60000-0x000000001BC70000-memory.dmp

memory/2076-123-0x00007FF9D6C90000-0x00007FF9D7751000-memory.dmp