Malware Analysis Report

2024-10-19 08:41

Sample ID 240417-ss5g9adg93
Target Client-built.exe
SHA256 5bc8c6aa7ccb11de2b19cabc08c096025da18e7898c5e8227ef109c266820f82
Tags
office04 quasar 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

5bc8c6aa7ccb11de2b19cabc08c096025da18e7898c5e8227ef109c266820f82

Threat Level: Known bad

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

Malicious Activity Summary

office04 quasar spyware trojan

Quasar RAT

Quasar family

Quasar payload

Executes dropped EXE

Unsigned PE

Suspicious use of FindShellTrayWindow

Uses Task Scheduler COM API

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of SendNotifyMessage

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Creates scheduled task(s)

Enumerates system info in registry

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-17 15:24

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

2024-04-17 15:24

Reported

2024-04-17 15:26

Platform

win7-20240221-en

Max time kernel

50s

Max time network

154s

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
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

Enumerates system info in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemProductName C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemManufacturer C:\Program Files\Google\Chrome\Application\chrome.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.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
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
Token: SeShutdownPrivilege N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.exe N/A
N/A N/A C:\Program Files\Google\Chrome\Application\chrome.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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1704 wrote to memory of 2560 N/A C:\Users\Admin\AppData\Local\Temp\Client-built.exe C:\Windows\system32\schtasks.exe
PID 1704 wrote to memory of 2560 N/A C:\Users\Admin\AppData\Local\Temp\Client-built.exe C:\Windows\system32\schtasks.exe
PID 1704 wrote to memory of 2560 N/A C:\Users\Admin\AppData\Local\Temp\Client-built.exe C:\Windows\system32\schtasks.exe
PID 1704 wrote to memory of 2496 N/A C:\Users\Admin\AppData\Local\Temp\Client-built.exe C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
PID 1704 wrote to memory of 2496 N/A C:\Users\Admin\AppData\Local\Temp\Client-built.exe C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
PID 1704 wrote to memory of 2496 N/A C:\Users\Admin\AppData\Local\Temp\Client-built.exe C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
PID 2496 wrote to memory of 1264 N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe C:\Windows\system32\schtasks.exe
PID 2496 wrote to memory of 1264 N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe C:\Windows\system32\schtasks.exe
PID 2496 wrote to memory of 1264 N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe C:\Windows\system32\schtasks.exe
PID 964 wrote to memory of 1960 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1960 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1960 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 1168 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 952 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 952 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 952 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 812 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 812 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 812 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 812 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 812 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 812 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 812 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 812 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 812 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.exe
PID 964 wrote to memory of 812 N/A C:\Program Files\Google\Chrome\Application\chrome.exe C:\Program Files\Google\Chrome\Application\chrome.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\explorer.exe

"C:\Windows\explorer.exe"

C:\Windows\system32\schtasks.exe

"schtasks" /create /tn "Windowsstartup" /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 "Windowsstartup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f

C:\Program Files\Google\Chrome\Application\chrome.exe

"C:\Program Files\Google\Chrome\Application\chrome.exe"

C:\Program Files\Google\Chrome\Application\chrome.exe

"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" --url=https://clients2.google.com/cr/report --annotation=channel= --annotation=plat=Win64 --annotation=prod=Chrome --annotation=ver=106.0.5249.119 --initial-client-data=0xc0,0xc4,0xc8,0x94,0xcc,0x7fef1f49758,0x7fef1f49768,0x7fef1f49778

C:\Program Files\Google\Chrome\Application\chrome.exe

"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --gpu-preferences=UAAAAAAAAADgAAAYAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAEgAAAAAAAAASAAAAAAAAAAYAAAAAgAAABAAAAAAAAAAGAAAAAAAAAAQAAAAAAAAAAAAAAAOAAAAEAAAAAAAAAABAAAADgAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=1124 --field-trial-handle=1308,i,7009118905232476703,3616224341990017264,131072 /prefetch:2

C:\Program Files\Google\Chrome\Application\chrome.exe

"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=1512 --field-trial-handle=1308,i,7009118905232476703,3616224341990017264,131072 /prefetch:8

C:\Program Files\Google\Chrome\Application\chrome.exe

"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=1564 --field-trial-handle=1308,i,7009118905232476703,3616224341990017264,131072 /prefetch:8

C:\Program Files\Google\Chrome\Application\chrome.exe

"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --first-renderer-process --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --mojo-platform-channel-handle=2308 --field-trial-handle=1308,i,7009118905232476703,3616224341990017264,131072 /prefetch:1

C:\Program Files\Google\Chrome\Application\106.0.5249.119\elevation_service.exe

"C:\Program Files\Google\Chrome\Application\106.0.5249.119\elevation_service.exe"

C:\Program Files\Google\Chrome\Application\chrome.exe

"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --mojo-platform-channel-handle=2316 --field-trial-handle=1308,i,7009118905232476703,3616224341990017264,131072 /prefetch:1

C:\Program Files\Google\Chrome\Application\chrome.exe

"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --gpu-preferences=UAAAAAAAAADgAAAYAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAEgAAAAAAAAASAAAAAAAAAAYAAAAAgAAABAAAAAAAAAAGAAAAAAAAAAQAAAAAAAAAAAAAAAOAAAAEAAAAAAAAAABAAAADgAAAAgAAAAAAAAACAAAAAAAAAA= --use-gl=angle --use-angle=swiftshader-webgl --mojo-platform-channel-handle=1388 --field-trial-handle=1308,i,7009118905232476703,3616224341990017264,131072 /prefetch:2

C:\Program Files\Google\Chrome\Application\chrome.exe

"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --disable-gpu-compositing --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=8 --mojo-platform-channel-handle=3364 --field-trial-handle=1308,i,7009118905232476703,3616224341990017264,131072 /prefetch:1

C:\Program Files\Google\Chrome\Application\chrome.exe

"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --mojo-platform-channel-handle=3204 --field-trial-handle=1308,i,7009118905232476703,3616224341990017264,131072 /prefetch:8

C:\Program Files\Google\Chrome\Application\chrome.exe

"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --mojo-platform-channel-handle=3588 --field-trial-handle=1308,i,7009118905232476703,3616224341990017264,131072 /prefetch:8

C:\Program Files\Google\Chrome\Application\chrome.exe

"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=3940 --field-trial-handle=1308,i,7009118905232476703,3616224341990017264,131072 /prefetch:8

Network

Country Destination Domain Proto
N/A 192.168.1.240:4782 tcp
US 8.8.8.8:53 www.google.com udp
GB 142.250.187.196:443 www.google.com tcp
US 8.8.8.8:53 apis.google.com udp
GB 142.250.200.14:443 apis.google.com tcp
N/A 224.0.0.251:5353 udp
N/A 192.168.1.240:4782 tcp
N/A 192.168.1.240:4782 tcp
N/A 192.168.1.240:4782 tcp
N/A 192.168.1.240:4782 tcp
N/A 192.168.1.240:4782 tcp

Files

memory/1704-0-0x0000000000830000-0x0000000000B54000-memory.dmp

memory/1704-1-0x000007FEF5780000-0x000007FEF616C000-memory.dmp

memory/1704-2-0x000000001B360000-0x000000001B3E0000-memory.dmp

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

MD5 eb8790c82d5096b84022449c2298c62a
SHA1 12030a6f4988fb744328bc1963c7017207e40276
SHA256 5bc8c6aa7ccb11de2b19cabc08c096025da18e7898c5e8227ef109c266820f82
SHA512 d4d7ac397e023e6c08dfd6681e802d4c52d56a45a4e66acd53bc0138d3ed45f3930ef0d90cdeaafcf478d08ecab28cae61ffe5c571fa4c37be39497f16891464

memory/2496-7-0x0000000001330000-0x0000000001654000-memory.dmp

memory/1704-9-0x000007FEF5780000-0x000007FEF616C000-memory.dmp

memory/2496-8-0x000007FEF5780000-0x000007FEF616C000-memory.dmp

memory/2496-10-0x000000001B040000-0x000000001B0C0000-memory.dmp

\??\pipe\crashpad_964_LFNCIOOCWSPJOLOX

MD5 d41d8cd98f00b204e9800998ecf8427e
SHA1 da39a3ee5e6b4b0d3255bfef95601890afd80709
SHA256 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA512 cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Site Characteristics Database\000007.dbtmp

MD5 18e723571b00fb1694a3bad6c78e4054
SHA1 afcc0ef32d46fe59e0483f9a3c891d3034d12f32
SHA256 8af72f43857550b01eab1019335772b367a17a9884a7a759fdf4fe6f272b90aa
SHA512 43bb0af7d3984012d2d67ca6b71f0201e5b948e6fe26a899641c4c6f066c59906d468ddf7f1df5ea5fa33c2bc5ea8219c0f2c82e0a5c365ad7581b898a8859e2

C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\GPUCache\data_1

MD5 f50f89a0a91564d0b8a211f8921aa7de
SHA1 112403a17dd69d5b9018b8cede023cb3b54eab7d
SHA256 b1e963d702392fb7224786e7d56d43973e9b9efd1b89c17814d7c558ffc0cdec
SHA512 bf8cda48cf1ec4e73f0dd1d4fa5562af1836120214edb74957430cd3e4a2783e801fa3f4ed2afb375257caeed4abe958265237d6e0aacf35a9ede7a2e8898d58

memory/2496-91-0x000007FEF5780000-0x000007FEF616C000-memory.dmp

memory/2496-92-0x000000001B040000-0x000000001B0C0000-memory.dmp

C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences

MD5 d874f01e5ddc0b2a6eda8412de64e8be
SHA1 355f3e887a3e56051743b804d1b0d679eb5073e3
SHA256 25cdd99a781c654cdf113dbc069cd327ae0bcd812f0cb569c9add26274f6335f
SHA512 be23487a2b91a1bab4d614b3c2c9cd02da299e4cbe23a583542a8bd6b32a7440c1775612b3aa2c2e5230134897b39b569092638332d932b3dcf2cfa3b2d962db

C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences

MD5 cf9f6ed139e499c9bbadfd3929e1f655
SHA1 549882f113639662ecafe8b454b4be6ed0e8b48d
SHA256 d7888071001eaf4c88f946eeacf61344d96353c90c58fe1536216b3c5fb51c01
SHA512 d008b1284c6ee4be294b60bc13284395b1c5c0cdfece77c0471f5c454b1211bce85be4c716fdd6334744fdb929c539b7d9f8e1b20567c9a4ff55a10e73d0dd32

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-17 15:24

Reported

2024-04-17 15:26

Platform

win10v2004-20240412-en

Max time kernel

150s

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 "Windowsstartup" /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 "Windowsstartup" /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 69.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 216.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
N/A 192.168.1.240:4782 tcp
US 8.8.8.8:53 21.114.53.23.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
N/A 192.168.1.240:4782 tcp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 65.139.73.23.in-addr.arpa udp
N/A 192.168.1.240:4782 tcp
US 8.8.8.8:53 241.197.17.2.in-addr.arpa udp
N/A 192.168.1.240:4782 tcp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
N/A 192.168.1.240:4782 tcp
N/A 192.168.1.240:4782 tcp
US 8.8.8.8:53 171.117.168.52.in-addr.arpa udp

Files

memory/4984-0-0x00000000001E0000-0x0000000000504000-memory.dmp

memory/4984-1-0x00007FF89B2C0000-0x00007FF89BD81000-memory.dmp

memory/4984-2-0x000000001B150000-0x000000001B160000-memory.dmp

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

MD5 eb8790c82d5096b84022449c2298c62a
SHA1 12030a6f4988fb744328bc1963c7017207e40276
SHA256 5bc8c6aa7ccb11de2b19cabc08c096025da18e7898c5e8227ef109c266820f82
SHA512 d4d7ac397e023e6c08dfd6681e802d4c52d56a45a4e66acd53bc0138d3ed45f3930ef0d90cdeaafcf478d08ecab28cae61ffe5c571fa4c37be39497f16891464

memory/3684-9-0x00007FF89B2C0000-0x00007FF89BD81000-memory.dmp

memory/4984-8-0x00007FF89B2C0000-0x00007FF89BD81000-memory.dmp

memory/3684-10-0x00000000030B0000-0x00000000030C0000-memory.dmp

memory/3684-11-0x000000001BCB0000-0x000000001BD00000-memory.dmp

memory/3684-12-0x000000001C4C0000-0x000000001C572000-memory.dmp

memory/3684-13-0x00007FF89B2C0000-0x00007FF89BD81000-memory.dmp

memory/3684-14-0x00000000030B0000-0x00000000030C0000-memory.dmp