Malware Analysis Report

2025-01-18 04:09

Sample ID 241031-hdzncasgrq
Target Client-built2.exe
SHA256 98b29ab07038ed53a9842ae6d9cf0991f0ce4ac54036ce5b703ef441be70b797
Tags
quasar office04 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 Overview

score
10/10

SHA256

98b29ab07038ed53a9842ae6d9cf0991f0ce4ac54036ce5b703ef441be70b797

Threat Level: Known bad

The file Client-built2.exe was found to be: Known bad.

Malicious Activity Summary

quasar office04 spyware trojan

Quasar family

Quasar payload

Quasar RAT

Executes dropped EXE

Unsigned PE

Enumerates physical storage devices

Suspicious use of SendNotifyMessage

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

Scheduled Task/Job: Scheduled Task

Suspicious use of FindShellTrayWindow

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-31 06:37

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

2024-10-31 06:37

Reported

2024-10-31 06:40

Platform

win10ltsc2021-20241023-en

Max time kernel

125s

Max time network

142s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Client-built2.exe"

Signatures

Quasar RAT

trojan spyware quasar

Quasar family

quasar

Quasar payload

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

Enumerates physical storage devices

Scheduled Task/Job: Scheduled Task

persistence execution
Description Indicator Process Target
N/A N/A C:\Windows\SYSTEM32\schtasks.exe N/A
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\Client-built2.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A

Suspicious use of FindShellTrayWindow

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

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A 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-built2.exe

"C:\Users\Admin\AppData\Local\Temp\Client-built2.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:\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

Network

Country Destination Domain Proto
US 8.8.8.8:53 134.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 77.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
N/A 10.127.0.200:4782 tcp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
N/A 10.127.0.200:4782 tcp
US 8.8.8.8:53 212.20.149.52.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
N/A 10.127.0.200:4782 tcp
US 8.8.8.8:53 79.190.18.2.in-addr.arpa udp
N/A 10.127.0.200:4782 tcp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp
N/A 10.127.0.200:4782 tcp
N/A 10.127.0.200:4782 tcp

Files

memory/2472-0-0x00007FF8378D3000-0x00007FF8378D5000-memory.dmp

memory/2472-1-0x0000000000470000-0x0000000000794000-memory.dmp

memory/2472-2-0x00007FF8378D0000-0x00007FF838392000-memory.dmp

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

MD5 600063adc2e3df654e26b40d7fcd5252
SHA1 03abd84e486da6ecdcc9f1acd5f89f0c5026daab
SHA256 98b29ab07038ed53a9842ae6d9cf0991f0ce4ac54036ce5b703ef441be70b797
SHA512 f4075584ec0a4ba56d4292b3f7d80ed6f4fc02c143a7e521e0c1838e1115870ca1e5f1ec2f6948d18c914da0ea5ed9dcac765382943a74683eed2deed57365ac

memory/2472-5-0x00007FF8378D0000-0x00007FF838392000-memory.dmp

memory/3676-6-0x00007FF8378D0000-0x00007FF838392000-memory.dmp

memory/3676-7-0x00007FF8378D0000-0x00007FF838392000-memory.dmp

memory/3676-8-0x000000001CA00000-0x000000001CA50000-memory.dmp

memory/3676-9-0x000000001CB10000-0x000000001CBC2000-memory.dmp

memory/3676-10-0x00007FF8378D0000-0x00007FF838392000-memory.dmp