Malware Analysis Report

2025-01-18 04:07

Sample ID 241031-hplwmasgnh
Target Client-built3.exe
SHA256 f8f2be9448bb64d2d67b6b9f724e5668a1584831aece7d49f9956b283aca77be
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: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

f8f2be9448bb64d2d67b6b9f724e5668a1584831aece7d49f9956b283aca77be

Threat Level: Known bad

The file Client-built3.exe was found to be: Known bad.

Malicious Activity Summary

quasar office04 spyware trojan

Quasar RAT

Quasar family

Quasar payload

Executes dropped EXE

Unsigned PE

Enumerates physical storage devices

Uses Task Scheduler COM API

Scheduled Task/Job: Scheduled Task

Suspicious use of AdjustPrivilegeToken

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-31 06:54

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 06:54

Reported

2024-10-31 06:57

Platform

win7-20240903-en

Max time kernel

149s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Client-built3.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
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-built3.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-built3.exe

"C:\Users\Admin\AppData\Local\Temp\Client-built3.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
N/A 10.127.0.200:4782 tcp
N/A 10.127.0.200:4782 tcp
N/A 10.127.0.200:4782 tcp
N/A 10.127.0.200:4782 tcp
N/A 10.127.0.200:4782 tcp
N/A 10.127.0.200:4782 tcp
N/A 10.127.0.200:4782 tcp

Files

memory/2132-0-0x000007FEF5193000-0x000007FEF5194000-memory.dmp

memory/2132-1-0x0000000000390000-0x00000000006B4000-memory.dmp

memory/2132-2-0x000007FEF5190000-0x000007FEF5B7C000-memory.dmp

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

MD5 0ba12b4cf0e785325ef57b8addc70899
SHA1 6ebc9ef072f738e0d89a286f08e359ceacff0095
SHA256 f8f2be9448bb64d2d67b6b9f724e5668a1584831aece7d49f9956b283aca77be
SHA512 5badb694a5318058f8d016258bc8c50886e8ebf753b97a95116dfb66e39061297ede0228aa9fa95b3f0614d70326aafb0f8bad4318993ef05f288e4a249a6889

memory/1704-8-0x0000000000F00000-0x0000000001224000-memory.dmp

memory/2132-7-0x000007FEF5190000-0x000007FEF5B7C000-memory.dmp

memory/1704-10-0x000007FEF5190000-0x000007FEF5B7C000-memory.dmp

memory/1704-9-0x000007FEF5190000-0x000007FEF5B7C000-memory.dmp

memory/1704-11-0x000007FEF5190000-0x000007FEF5B7C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-31 06:54

Reported

2024-10-31 06:57

Platform

win10v2004-20241007-en

Max time kernel

150s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Client-built3.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-built3.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-built3.exe

"C:\Users\Admin\AppData\Local\Temp\Client-built3.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 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 69.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 73.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
N/A 10.127.0.200:4782 tcp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
N/A 10.127.0.200:4782 tcp
US 8.8.8.8:53 200.163.202.172.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 69.190.18.2.in-addr.arpa udp
N/A 10.127.0.200:4782 tcp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
N/A 10.127.0.200:4782 tcp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp
N/A 10.127.0.200:4782 tcp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
N/A 10.127.0.200:4782 tcp
US 8.8.8.8:53 85.65.42.20.in-addr.arpa udp

Files

memory/632-0-0x00007FF95A713000-0x00007FF95A715000-memory.dmp

memory/632-1-0x00000000006E0000-0x0000000000A04000-memory.dmp

memory/632-2-0x00007FF95A710000-0x00007FF95B1D1000-memory.dmp

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

MD5 0ba12b4cf0e785325ef57b8addc70899
SHA1 6ebc9ef072f738e0d89a286f08e359ceacff0095
SHA256 f8f2be9448bb64d2d67b6b9f724e5668a1584831aece7d49f9956b283aca77be
SHA512 5badb694a5318058f8d016258bc8c50886e8ebf753b97a95116dfb66e39061297ede0228aa9fa95b3f0614d70326aafb0f8bad4318993ef05f288e4a249a6889

memory/632-8-0x00007FF95A710000-0x00007FF95B1D1000-memory.dmp

memory/384-9-0x00007FF95A710000-0x00007FF95B1D1000-memory.dmp

memory/384-10-0x00007FF95A710000-0x00007FF95B1D1000-memory.dmp

memory/384-11-0x000000001C3E0000-0x000000001C430000-memory.dmp

memory/384-12-0x000000001C4F0000-0x000000001C5A2000-memory.dmp

memory/384-13-0x00007FF95A710000-0x00007FF95B1D1000-memory.dmp