Malware Analysis Report

2024-10-19 08:36

Sample ID 240801-ksk5lsscpq
Target 429d98e4f83301b513eab17210d91579428ac61e976e0df744d155f7f27f46b0
SHA256 429d98e4f83301b513eab17210d91579428ac61e976e0df744d155f7f27f46b0
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

429d98e4f83301b513eab17210d91579428ac61e976e0df744d155f7f27f46b0

Threat Level: Known bad

The file 429d98e4f83301b513eab17210d91579428ac61e976e0df744d155f7f27f46b0 was found to be: Known bad.

Malicious Activity Summary

office04 quasar spyware trojan

Quasar RAT

Quasar family

Quasar payload

Unsigned PE

Scheduled Task/Job: Scheduled Task

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-01 08:51

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

2024-08-01 08:51

Reported

2024-08-01 08:54

Platform

win7-20240708-en

Max time kernel

148s

Max time network

154s

Command Line

"C:\Users\Admin\AppData\Local\Temp\429d98e4f83301b513eab17210d91579428ac61e976e0df744d155f7f27f46b0.exe"

Signatures

Quasar RAT

trojan spyware quasar

Quasar payload

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

Scheduled Task/Job: Scheduled Task

persistence execution
Description Indicator Process Target
N/A N/A C:\Windows\system32\schtasks.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\429d98e4f83301b513eab17210d91579428ac61e976e0df744d155f7f27f46b0.exe N/A

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\429d98e4f83301b513eab17210d91579428ac61e976e0df744d155f7f27f46b0.exe

"C:\Users\Admin\AppData\Local\Temp\429d98e4f83301b513eab17210d91579428ac61e976e0df744d155f7f27f46b0.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

Network

Country Destination Domain Proto
N/A 192.168.8.195:4782 tcp
N/A 192.168.8.195:4782 tcp
N/A 192.168.8.195:4782 tcp
N/A 192.168.8.195:4782 tcp
N/A 192.168.8.195:4782 tcp
N/A 192.168.8.195:4782 tcp
N/A 192.168.8.195:4782 tcp

Files

memory/1892-0-0x000007FEF53D3000-0x000007FEF53D4000-memory.dmp

memory/1892-1-0x0000000000190000-0x00000000004B4000-memory.dmp

memory/1892-2-0x000007FEF53D0000-0x000007FEF5DBC000-memory.dmp

memory/1892-3-0x000007FEF53D3000-0x000007FEF53D4000-memory.dmp

memory/1892-4-0x000007FEF53D0000-0x000007FEF5DBC000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-01 08:51

Reported

2024-08-01 08:54

Platform

win10v2004-20240730-en

Max time kernel

149s

Max time network

155s

Command Line

"C:\Users\Admin\AppData\Local\Temp\429d98e4f83301b513eab17210d91579428ac61e976e0df744d155f7f27f46b0.exe"

Signatures

Quasar RAT

trojan spyware quasar

Quasar payload

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

Scheduled Task/Job: Scheduled Task

persistence execution
Description Indicator Process Target
N/A N/A C:\Windows\SYSTEM32\schtasks.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\429d98e4f83301b513eab17210d91579428ac61e976e0df744d155f7f27f46b0.exe N/A

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\429d98e4f83301b513eab17210d91579428ac61e976e0df744d155f7f27f46b0.exe

"C:\Users\Admin\AppData\Local\Temp\429d98e4f83301b513eab17210d91579428ac61e976e0df744d155f7f27f46b0.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

Network

Country Destination Domain Proto
N/A 192.168.8.195:4782 tcp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
N/A 192.168.8.195:4782 tcp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
N/A 192.168.8.195:4782 tcp
N/A 192.168.8.195:4782 tcp
US 8.8.8.8:53 39.58.20.217.in-addr.arpa udp
N/A 192.168.8.195:4782 tcp
N/A 192.168.8.195:4782 tcp
N/A 192.168.8.195:4782 tcp

Files

memory/4000-0-0x00007FFFADC73000-0x00007FFFADC75000-memory.dmp

memory/4000-1-0x0000000000210000-0x0000000000534000-memory.dmp

memory/4000-2-0x00007FFFADC70000-0x00007FFFAE731000-memory.dmp

memory/4000-3-0x000000001D080000-0x000000001D0D0000-memory.dmp

memory/4000-4-0x000000001D190000-0x000000001D242000-memory.dmp

memory/4000-5-0x00007FFFADC73000-0x00007FFFADC75000-memory.dmp

memory/4000-6-0x00007FFFADC70000-0x00007FFFAE731000-memory.dmp