Overview

overview

10

Static

static

1

URLScan

urlscan

https://mega.nz/fold...

windows10-2004-x64

10

Sharing

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General

  • Target

    https://mega.nz/folder/NNhizKIY#_598We3JUoSu2eXAdjgzhg

  • Sample

    241218-cqabbsykft

Score
10/10
quasaroffice04discoverypersistencespywaretrojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Office04

C2

192.168.1.11:4782

Mutex

QSR_MUTEX_f39lWqYnYtP5YngtM5

Attributes
  • encryption_key

    c5q7P5jsfrwN6nB5c3mG

  • install_name

    SystemUpdate.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    WindowsUpdate

  • subdirectory

    SubDir

Targets

    • Target

      https://mega.nz/folder/NNhizKIY#_598We3JUoSu2eXAdjgzhg

    Score
    10/10
    quasaroffice04discoverypersistencespywaretrojan

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar family

      quasar

    • Quasar payload

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • Adds Run key to start application

      persistence

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

      discovery

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Drops file in System32 directory

    behavioral1

MITRE ATT&CK Enterprise v15

Tasks