Overview

overview

10

Static

static

1

URLScan

urlscan

1

https://justbeamit.c...

windows10-2004-x64

10

Sharing

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General

  • Target

    https://justbeamit.com/yem57

  • Sample

    240630-nma91axbkc

Score
10/10
quasaroffice04discoveryevasionpersistenceprivilege_escalationspywaretrojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

10.240.115.45:4782

Mutex

2cc201c7-b02e-4a34-8806-aa9a8d33ae2d

Attributes
  • encryption_key

    64024FEFC383421D2550E88D4DBE252B6BA53116

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Targets

    • Target

      https://justbeamit.com/yem57

    Score
    10/10
    quasaroffice04discoveryevasionpersistenceprivilege_escalationspywaretrojan

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • Drops file in Drivers directory

    • Modifies Windows Firewall

      evasion

    • Event Triggered Execution: Component Object Model Hijacking

      Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.

      persistenceprivilege_escalation

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies file permissions

      discovery

    • Adds Run key to start application

      persistence

    • Blocklisted process makes network request

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Drops file in System32 directory

    behavioral1

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Persistence

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Event Triggered Execution

2
T1546

Netsh Helper DLL

1
T1546.007

Component Object Model Hijacking

1
T1546.015

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Privilege Escalation

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Event Triggered Execution

2
T1546

Netsh Helper DLL

1
T1546.007

Component Object Model Hijacking

1
T1546.015

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

Impair Defenses

1
T1562

Disable or Modify System Firewall

1
T1562.004

File and Directory Permissions Modification

1
T1222

Modify Registry

2
T1112

Credential Access

Discovery

Query Registry

4
T1012

Peripheral Device Discovery

2
T1120

System Information Discovery

3
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Tasks