Malware Analysis Report

2024-10-23 21:28

Sample ID 240413-xym8dage47
Target Client-built.exe
SHA256 796d5a37143cb32778bab8b2210e35c22d75bfaf2368323b0d2400ace4ded468
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: behavioral3

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

796d5a37143cb32778bab8b2210e35c22d75bfaf2368323b0d2400ace4ded468

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

Executes dropped EXE

Drops file in Windows directory

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious use of SendNotifyMessage

Suspicious use of FindShellTrayWindow

Suspicious behavior: GetForegroundWindowSpam

Checks SCSI registry key(s)

Creates scheduled task(s)

Uses Task Scheduler COM API

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-13 19:15

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

2024-04-13 19:15

Reported

2024-04-13 19:18

Platform

win10-20240404-en

Max time kernel

150s

Max time network

141s

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

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\rescache\_merged\4183903823\2290032291.pri C:\Windows\system32\taskmgr.exe N/A
File created C:\Windows\rescache\_merged\1601268389\715946058.pri C:\Windows\system32\taskmgr.exe N/A

Checks SCSI registry key(s)

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_QEMU&Prod_HARDDISK\4&215468a5&0&000000 C:\Windows\system32\taskmgr.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_QEMU&Prod_HARDDISK\4&215468a5&0&000000\Properties\{b725f130-47ef-101a-a5f1-02608c9eebac}\000A C:\Windows\system32\taskmgr.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_QEMU&Prod_HARDDISK\4&215468a5&0&000000\FriendlyName C:\Windows\system32\taskmgr.exe N/A

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\SYSTEM32\schtasks.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A

Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A C:\Windows\system32\taskmgr.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Client-built.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\system32\taskmgr.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Windows\system32\taskmgr.exe N/A
Token: SeCreateGlobalPrivilege N/A C:\Windows\system32\taskmgr.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A
N/A N/A C:\Windows\system32\taskmgr.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3964 wrote to memory of 4548 N/A C:\Users\Admin\AppData\Local\Temp\Client-built.exe C:\Windows\SYSTEM32\schtasks.exe
PID 3964 wrote to memory of 4548 N/A C:\Users\Admin\AppData\Local\Temp\Client-built.exe C:\Windows\SYSTEM32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

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

"C:\Users\Admin\AppData\Local\Temp\Client-built.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:\Windows\system32\taskmgr.exe

"C:\Windows\system32\taskmgr.exe" /4

Network

Country Destination Domain Proto
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 106.246.116.51.in-addr.arpa udp

Files

memory/3964-0-0x0000000000820000-0x0000000000B44000-memory.dmp

memory/3964-1-0x00007FF8F9630000-0x00007FF8FA01C000-memory.dmp

memory/3964-2-0x000000001B9F0000-0x000000001BA00000-memory.dmp

memory/3964-9-0x00007FF8F9630000-0x00007FF8FA01C000-memory.dmp

memory/3964-10-0x000000001B9F0000-0x000000001BA00000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-13 19:15

Reported

2024-04-13 19:18

Platform

win10v2004-20240412-en

Max time kernel

147s

Max time network

151s

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
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\Client-built.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

Uses Task Scheduler COM API

persistence

Processes

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

"C:\Users\Admin\AppData\Local\Temp\Client-built.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 75.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 249.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 LunasLove-64385.portmap.host udp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 21.114.53.23.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 130.118.77.104.in-addr.arpa udp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp

Files

memory/2404-0-0x00000000000B0000-0x00000000003D4000-memory.dmp

memory/2404-1-0x00007FF8519B0000-0x00007FF852471000-memory.dmp

memory/2404-2-0x000000001B120000-0x000000001B130000-memory.dmp

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

MD5 61a794936ec8a32416ab054556f6270e
SHA1 08f16c442752f65c04b8452642fd7b6102314fb0
SHA256 796d5a37143cb32778bab8b2210e35c22d75bfaf2368323b0d2400ace4ded468
SHA512 8000d3dfca0ef4daca77ad968af0c0ff496de9da59ffa5168479b0dcbd792ce5f1ea620cf0ff51d2bff1613383c3a3feeeccf1e07af963c199cb1d10e4d37988

memory/2404-9-0x00007FF8519B0000-0x00007FF852471000-memory.dmp

memory/4072-10-0x00007FF8519B0000-0x00007FF852471000-memory.dmp

memory/4072-11-0x000000001B910000-0x000000001B920000-memory.dmp

memory/4072-12-0x000000001B8C0000-0x000000001B910000-memory.dmp

memory/4072-13-0x000000001BFE0000-0x000000001C092000-memory.dmp

memory/4072-14-0x00007FF8519B0000-0x00007FF852471000-memory.dmp

memory/4072-15-0x000000001B910000-0x000000001B920000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2024-04-13 19:15

Reported

2024-04-13 19:18

Platform

win11-20240412-en

Max time kernel

147s

Max time network

153s

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
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\Client-built.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

Uses Task Scheduler COM API

persistence

Processes

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

"C:\Users\Admin\AppData\Local\Temp\Client-built.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 LunasLove-64385.portmap.host udp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
NL 52.111.243.29:443 tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp
DE 193.161.193.99:64285 LunasLove-64385.portmap.host tcp

Files

memory/8-0-0x0000000000C20000-0x0000000000F44000-memory.dmp

memory/8-1-0x00007FFE4E4D0000-0x00007FFE4EF92000-memory.dmp

memory/8-2-0x000000001BCC0000-0x000000001BCD0000-memory.dmp

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

MD5 61a794936ec8a32416ab054556f6270e
SHA1 08f16c442752f65c04b8452642fd7b6102314fb0
SHA256 796d5a37143cb32778bab8b2210e35c22d75bfaf2368323b0d2400ace4ded468
SHA512 8000d3dfca0ef4daca77ad968af0c0ff496de9da59ffa5168479b0dcbd792ce5f1ea620cf0ff51d2bff1613383c3a3feeeccf1e07af963c199cb1d10e4d37988

memory/8-9-0x00007FFE4E4D0000-0x00007FFE4EF92000-memory.dmp

memory/1532-10-0x00007FFE4E4D0000-0x00007FFE4EF92000-memory.dmp

memory/1532-11-0x000000001BCC0000-0x000000001BCD0000-memory.dmp

memory/1532-12-0x000000001BC30000-0x000000001BC80000-memory.dmp

memory/1532-13-0x000000001C880000-0x000000001C932000-memory.dmp

memory/1532-14-0x00007FFE4E4D0000-0x00007FFE4EF92000-memory.dmp

memory/1532-15-0x000000001BCC0000-0x000000001BCD0000-memory.dmp