Malware Analysis Report

2024-10-23 21:29

Sample ID 240412-sr5rmaef2v
Target Client-built.exe
SHA256 6d03d6c26940eb9f2f6eaaa1d0a49d3f24a2941ec85bc7f12d3fb72162d780c8
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 Overview

score
10/10

SHA256

6d03d6c26940eb9f2f6eaaa1d0a49d3f24a2941ec85bc7f12d3fb72162d780c8

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 payload

Quasar family

Executes dropped EXE

Unsigned PE

Enumerates physical storage devices

Creates scheduled task(s)

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Suspicious use of FindShellTrayWindow

Uses Task Scheduler COM API

Runs ping.exe

Suspicious use of AdjustPrivilegeToken

Suspicious use of SendNotifyMessage

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-12 15:22

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

2024-04-12 15:22

Reported

2024-04-12 15:23

Platform

win10-20240404-en

Max time kernel

19s

Max time network

20s

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\Google.exe.exe N/A

Enumerates physical storage devices

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

Runs ping.exe

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

Suspicious use of FindShellTrayWindow

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

Suspicious use of SetWindowsHookEx

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3120 wrote to memory of 2880 N/A C:\Users\Admin\AppData\Local\Temp\Client-built.exe C:\Windows\SYSTEM32\schtasks.exe
PID 3120 wrote to memory of 2880 N/A C:\Users\Admin\AppData\Local\Temp\Client-built.exe C:\Windows\SYSTEM32\schtasks.exe
PID 3120 wrote to memory of 2764 N/A C:\Users\Admin\AppData\Local\Temp\Client-built.exe C:\Users\Admin\AppData\Roaming\SubDir\Google.exe.exe
PID 3120 wrote to memory of 2764 N/A C:\Users\Admin\AppData\Local\Temp\Client-built.exe C:\Users\Admin\AppData\Roaming\SubDir\Google.exe.exe
PID 2764 wrote to memory of 2780 N/A C:\Users\Admin\AppData\Roaming\SubDir\Google.exe.exe C:\Windows\SYSTEM32\schtasks.exe
PID 2764 wrote to memory of 2780 N/A C:\Users\Admin\AppData\Roaming\SubDir\Google.exe.exe C:\Windows\SYSTEM32\schtasks.exe
PID 2764 wrote to memory of 832 N/A C:\Users\Admin\AppData\Roaming\SubDir\Google.exe.exe C:\Windows\SYSTEM32\schtasks.exe
PID 2764 wrote to memory of 832 N/A C:\Users\Admin\AppData\Roaming\SubDir\Google.exe.exe C:\Windows\SYSTEM32\schtasks.exe
PID 2764 wrote to memory of 2620 N/A C:\Users\Admin\AppData\Roaming\SubDir\Google.exe.exe C:\Windows\system32\cmd.exe
PID 2764 wrote to memory of 2620 N/A C:\Users\Admin\AppData\Roaming\SubDir\Google.exe.exe C:\Windows\system32\cmd.exe
PID 2620 wrote to memory of 4588 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\chcp.com
PID 2620 wrote to memory of 4588 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\chcp.com
PID 2620 wrote to memory of 4544 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\PING.EXE
PID 2620 wrote to memory of 4544 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\PING.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 "AntimaIware Core Service" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Google.exe.exe" /rl HIGHEST /f

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

"C:\Users\Admin\AppData\Roaming\SubDir\Google.exe.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "AntimaIware Core Service" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Google.exe.exe" /rl HIGHEST /f

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /delete /tn "AntimaIware Core Service" /f

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\0cVCuv9jI9s7.bat" "

C:\Windows\system32\chcp.com

chcp 65001

C:\Windows\system32\PING.EXE

ping -n 10 localhost

Network

Country Destination Domain Proto
US 8.8.8.8:53 us1.localto.net udp
US 162.212.154.8:38905 us1.localto.net tcp
US 8.8.8.8:53 ipwho.is udp
DE 195.201.57.90:443 ipwho.is tcp
US 8.8.8.8:53 8.154.212.162.in-addr.arpa udp
US 8.8.8.8:53 249.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 90.57.201.195.in-addr.arpa udp

Files

memory/3120-0-0x0000000000BD0000-0x0000000000EF4000-memory.dmp

memory/3120-1-0x00007FFBB4130000-0x00007FFBB4B1C000-memory.dmp

memory/3120-2-0x000000001BBB0000-0x000000001BBC0000-memory.dmp

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

MD5 383aa601a1a3e6722935b017a215f4b8
SHA1 3855b5d5ba3ba2f161bd6d60caac5415e93bd482
SHA256 6d03d6c26940eb9f2f6eaaa1d0a49d3f24a2941ec85bc7f12d3fb72162d780c8
SHA512 ceff9701a5cbc5bc6d61d5ebf0764b54aa056bdb311789f4dec7065a0910050932024498d0ee3a0a7f6b3cce2e5b77ff89d132120a4581536aa33822684f10eb

memory/3120-9-0x00007FFBB4130000-0x00007FFBB4B1C000-memory.dmp

memory/2764-10-0x00007FFBB4130000-0x00007FFBB4B1C000-memory.dmp

memory/2764-11-0x000000001C240000-0x000000001C290000-memory.dmp

memory/2764-12-0x000000001C350000-0x000000001C402000-memory.dmp

memory/2764-15-0x000000001C2C0000-0x000000001C2D2000-memory.dmp

memory/2764-16-0x000000001CE40000-0x000000001CE7E000-memory.dmp

memory/2764-21-0x00007FFBB4130000-0x00007FFBB4B1C000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\0cVCuv9jI9s7.bat

MD5 63d1fe662d6bfa45eb2a9a93d4d35b8b
SHA1 6693da4443f98ee47530b58c5e3a130beedf1971
SHA256 231316589487353199f0a88a4387aede7cd578921916c8f8d9627490140334bd
SHA512 e917ed85c3e789258a4bc140174e89045d9c056cf31b9b1cc0cb499f96bbdf4db008757a7c560a7a26695dfa5df423655fcb6aba32274aa2a64426a3845e36df