Malware Analysis Report

2025-04-14 05:07

Sample ID 230115-wf94rahh74
Target testating.exe
SHA256 76257feb8d753a419e11bd0672eac3d236ac990d8ba8baf7ec44c5f1f3eac591
Tags
quasar office04 spyware trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

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

76257feb8d753a419e11bd0672eac3d236ac990d8ba8baf7ec44c5f1f3eac591

Threat Level: Known bad

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

Malicious Activity Summary

quasar office04 spyware trojan

Quasar family

Quasar RAT

Quasar payload

Executes dropped EXE

Suspicious use of WriteProcessMemory

Suspicious use of SetWindowsHookEx

Creates scheduled task(s)

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-01-15 17:53

Signatures

Quasar family

quasar

Quasar payload

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-01-15 17:53

Reported

2023-01-15 17:55

Platform

win7-20221111-en

Max time kernel

31s

Max time network

34s

Command Line

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

Signatures

Quasar RAT

trojan spyware quasar

Quasar payload

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

Creates scheduled task(s)

persistence
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\testating.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1992 wrote to memory of 1260 N/A C:\Users\Admin\AppData\Local\Temp\testating.exe C:\Windows\system32\schtasks.exe
PID 1992 wrote to memory of 1260 N/A C:\Users\Admin\AppData\Local\Temp\testating.exe C:\Windows\system32\schtasks.exe
PID 1992 wrote to memory of 1260 N/A C:\Users\Admin\AppData\Local\Temp\testating.exe C:\Windows\system32\schtasks.exe

Processes

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

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

C:\Windows\system32\schtasks.exe

"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\testating.exe" /rl HIGHEST /f

Network

N/A

Files

memory/1992-54-0x0000000000D00000-0x0000000000D84000-memory.dmp

memory/1992-55-0x000007FEFBDF1000-0x000007FEFBDF3000-memory.dmp

memory/1260-56-0x0000000000000000-mapping.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-01-15 17:53

Reported

2023-01-15 17:55

Platform

win10v2004-20221111-en

Max time kernel

133s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\testating.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
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

Creates scheduled task(s)

persistence
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\testating.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A

Suspicious use of SetWindowsHookEx

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

Processes

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

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

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\testating.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 192.168.1.237:1290 tcp
N/A 192.168.1.237:1290 tcp
N/A 13.89.179.9:443 tcp
N/A 96.16.53.148:80 tcp
N/A 96.16.53.148:80 tcp
N/A 96.16.53.148:80 tcp
N/A 104.80.225.205:443 tcp
N/A 192.168.1.237:1290 tcp
N/A 192.168.1.237:1290 tcp
N/A 192.168.1.237:1290 tcp
N/A 192.168.1.237:1290 tcp

Files

memory/4488-132-0x0000000000500000-0x0000000000584000-memory.dmp

memory/4488-133-0x00007FFA23010000-0x00007FFA23AD1000-memory.dmp

memory/664-134-0x0000000000000000-mapping.dmp

memory/3788-135-0x0000000000000000-mapping.dmp

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

MD5 1f8f68e7623630103601f6235e9c94a6
SHA1 3c32c376b1be12d1f9df117eb8435804548c02c8
SHA256 76257feb8d753a419e11bd0672eac3d236ac990d8ba8baf7ec44c5f1f3eac591
SHA512 c93ba03f50602919a8355334c1450fb9f57aeb432027e53c458195d7dfbdc3940d042e136eb3ace24cd76c1ffbd359be05582893fc0e53f5fe764c8c32fe6631

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

MD5 1f8f68e7623630103601f6235e9c94a6
SHA1 3c32c376b1be12d1f9df117eb8435804548c02c8
SHA256 76257feb8d753a419e11bd0672eac3d236ac990d8ba8baf7ec44c5f1f3eac591
SHA512 c93ba03f50602919a8355334c1450fb9f57aeb432027e53c458195d7dfbdc3940d042e136eb3ace24cd76c1ffbd359be05582893fc0e53f5fe764c8c32fe6631

memory/4488-138-0x00007FFA23010000-0x00007FFA23AD1000-memory.dmp

memory/3788-139-0x00007FFA23010000-0x00007FFA23AD1000-memory.dmp

memory/3880-140-0x0000000000000000-mapping.dmp

memory/3788-141-0x000000001B2A0000-0x000000001B2F0000-memory.dmp

memory/3788-142-0x000000001C8B0000-0x000000001C962000-memory.dmp

memory/3788-143-0x00007FFA23010000-0x00007FFA23AD1000-memory.dmp