Malware Analysis Report

2024-10-19 08:41

Sample ID 240420-wfmcpaed9w
Target Windows Remote Access Trojan.exe
SHA256 19b707de920bf77466108ba32a3d4b01fe051f46173db4bbf65c9e17895d9f55
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 Overview

score
10/10

SHA256

19b707de920bf77466108ba32a3d4b01fe051f46173db4bbf65c9e17895d9f55

Threat Level: Known bad

The file Windows Remote Access Trojan.exe was found to be: Known bad.

Malicious Activity Summary

quasar office04 spyware trojan

Quasar family

Quasar RAT

Quasar payload

Executes dropped EXE

Unsigned PE

Creates scheduled task(s)

Suspicious use of SetWindowsHookEx

Uses Task Scheduler COM API

Modifies registry class

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-20 17:51

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

2024-04-20 17:51

Reported

2024-04-20 17:55

Platform

win11-20240412-en

Max time kernel

198s

Max time network

207s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Windows Remote Access Trojan.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

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-834482027-582050234-2368284635-1000_Classes\Local Settings C:\Windows\system32\OpenWith.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Windows Remote Access Trojan.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
N/A N/A C:\Windows\system32\OpenWith.exe N/A

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\Windows Remote Access Trojan.exe

"C:\Users\Admin\AppData\Local\Temp\Windows Remote Access Trojan.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

C:\Windows\System32\rundll32.exe

C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding

C:\Windows\system32\OpenWith.exe

C:\Windows\system32\OpenWith.exe -Embedding

Network

Country Destination Domain Proto
N/A 192.168.1.154:4782 tcp
N/A 192.168.1.154:4782 tcp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
GB 104.86.110.112:443 tcp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
N/A 192.168.1.154:4782 tcp
N/A 192.168.1.154:4782 tcp
N/A 192.168.1.154:4782 tcp
N/A 192.168.1.154:4782 tcp
N/A 192.168.1.154:4782 tcp
N/A 192.168.1.154:4782 tcp
N/A 192.168.1.154:4782 tcp

Files

memory/4720-0-0x00000000006C0000-0x00000000009E4000-memory.dmp

memory/4720-1-0x00007FFE5F740000-0x00007FFE60202000-memory.dmp

memory/4720-2-0x000000001B700000-0x000000001B710000-memory.dmp

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

MD5 2c2172ccafa055a00312e4e3a08f229a
SHA1 1c9dd30693318258d8ffd70984cb348d755c5d97
SHA256 19b707de920bf77466108ba32a3d4b01fe051f46173db4bbf65c9e17895d9f55
SHA512 ceecdee4cdb348a59f7b918b7c1d641e6ac398601493d87e1c91128387664effb457256cec427f71686cda808418003c8dc01ae9b22cb6ce76338237e5213225

memory/4720-9-0x00007FFE5F740000-0x00007FFE60202000-memory.dmp

memory/1148-10-0x00007FFE5F740000-0x00007FFE60202000-memory.dmp

memory/1148-11-0x000000001BD60000-0x000000001BD70000-memory.dmp

memory/1148-12-0x000000001C9B0000-0x000000001CA00000-memory.dmp

memory/1148-13-0x000000001CAC0000-0x000000001CB72000-memory.dmp

memory/1148-14-0x00007FFE5F740000-0x00007FFE60202000-memory.dmp

memory/1148-15-0x000000001BD60000-0x000000001BD70000-memory.dmp