Malware Analysis Report

2025-06-16 05:31

Sample ID 240315-flhnpagg2v
Target Quasar.exe
SHA256 43315abb9c8be9a39782bd8694a7ea9f16a867500dc804454d04b8bf2c15c51e
Tags
quasar spyware trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

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

43315abb9c8be9a39782bd8694a7ea9f16a867500dc804454d04b8bf2c15c51e

Threat Level: Known bad

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

Malicious Activity Summary

quasar spyware trojan

Quasar family

Quasar payload

Quasar RAT

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2024-03-15 04:57

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

2024-03-15 04:57

Reported

2024-03-15 05:25

Platform

win7-20240215-en

Max time kernel

360s

Max time network

361s

Command Line

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

Signatures

Quasar RAT

trojan spyware quasar

Quasar payload

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

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1200 wrote to memory of 2204 N/A C:\Users\Admin\AppData\Local\Temp\Quasar.exe C:\Windows\system32\WerFault.exe
PID 1200 wrote to memory of 2204 N/A C:\Users\Admin\AppData\Local\Temp\Quasar.exe C:\Windows\system32\WerFault.exe
PID 1200 wrote to memory of 2204 N/A C:\Users\Admin\AppData\Local\Temp\Quasar.exe C:\Windows\system32\WerFault.exe

Processes

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

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

C:\Windows\system32\WerFault.exe

C:\Windows\system32\WerFault.exe -u -p 1200 -s 584

Network

N/A

Files

memory/1200-0-0x0000000000BB0000-0x0000000000CE8000-memory.dmp

memory/1200-1-0x000007FEF5350000-0x000007FEF5D3C000-memory.dmp

memory/1200-2-0x000000001B560000-0x000000001B5E0000-memory.dmp

memory/1200-3-0x000007FEF5350000-0x000007FEF5D3C000-memory.dmp

memory/1200-4-0x000000001B560000-0x000000001B5E0000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-15 04:57

Reported

2024-03-15 05:25

Platform

win10v2004-20231215-en

Max time kernel

449s

Max time network

451s

Command Line

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

Signatures

Quasar RAT

trojan spyware quasar

Quasar payload

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

Suspicious use of AdjustPrivilegeToken

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

Processes

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 180.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 73.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 233.17.178.52.in-addr.arpa udp

Files

memory/1536-0-0x000001D918440000-0x000001D918578000-memory.dmp

memory/1536-2-0x000001D932AD0000-0x000001D932AE0000-memory.dmp

memory/1536-1-0x00007FFFAAD70000-0x00007FFFAB831000-memory.dmp

memory/1536-3-0x00007FFFAAD70000-0x00007FFFAB831000-memory.dmp