Malware Analysis Report

2025-01-18 04:27

Sample ID 231212-v7mxvsaha4
Target Client-built.exe
SHA256 aac3318a190c7dc53512c3b492cd1cd6849b5095fb1f112ba296f9c079194340
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

aac3318a190c7dc53512c3b492cd1cd6849b5095fb1f112ba296f9c079194340

Threat Level: Known bad

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

Malicious Activity Summary

quasar office04 spyware trojan

Quasar family

Quasar RAT

Quasar payload

Unsigned PE

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-12-12 17:38

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

2023-12-12 17:37

Reported

2023-12-12 17:40

Platform

win7-20231129-en

Max time kernel

147s

Max time network

148s

Command Line

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

Signatures

Quasar RAT

trojan spyware quasar

Quasar payload

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

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Client-built.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Client-built.exe N/A

Processes

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

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

Network

Country Destination Domain Proto
BG 91.92.242.148:4782 tcp
BG 91.92.242.148:4782 tcp
BG 91.92.242.148:4782 tcp
BG 91.92.242.148:4782 tcp
BG 91.92.242.148:4782 tcp
BG 91.92.242.148:4782 tcp
BG 91.92.242.148:4782 tcp

Files

memory/2116-0-0x0000000000230000-0x0000000000554000-memory.dmp

memory/2116-1-0x000007FEF57D0000-0x000007FEF61BC000-memory.dmp

memory/2116-2-0x000000001AEF0000-0x000000001AF70000-memory.dmp

memory/2116-3-0x000007FEF57D0000-0x000007FEF61BC000-memory.dmp

memory/2116-4-0x000000001AEF0000-0x000000001AF70000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-12 17:37

Reported

2023-12-12 17:40

Platform

win10v2004-20231130-en

Max time kernel

148s

Max time network

150s

Command Line

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

Signatures

Quasar RAT

trojan spyware quasar

Quasar payload

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

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Client-built.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Client-built.exe N/A

Processes

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
BG 91.92.242.148:4782 tcp
BG 91.92.242.148:4782 tcp
BG 91.92.242.148:4782 tcp
BG 91.92.242.148:4782 tcp
BG 91.92.242.148:4782 tcp
BG 91.92.242.148:4782 tcp
BG 91.92.242.148:4782 tcp

Files

memory/4892-0-0x0000000000540000-0x0000000000864000-memory.dmp

memory/4892-1-0x00007FFFC8810000-0x00007FFFC92D1000-memory.dmp

memory/4892-2-0x000000001B4B0000-0x000000001B4C0000-memory.dmp

memory/4892-3-0x000000001BF50000-0x000000001BFA0000-memory.dmp

memory/4892-4-0x000000001C060000-0x000000001C112000-memory.dmp

memory/4892-5-0x00007FFFC8810000-0x00007FFFC92D1000-memory.dmp

memory/4892-6-0x000000001B4B0000-0x000000001B4C0000-memory.dmp