Overview

overview

10

Static

static

10

Client-built.exe

windows10-2004-x64

10

Client-built.exe

windows11-ltsc_2024-x64

10

Sharing

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General

  • Target
    Client-built.exe
  • Size 1.6MB
  • Sample260619-qfv2yahw81
  • SHA256 0cf3729eed49f719d5fe60b5da523ebc08a90fc7d7e228632811b775a7ee03cf
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
quasaroffice04adwaredefense_evasionpersistenceransomwarespywaretrojan

Malware Config

Extracted

Family

  • quasar

Version

  • 1.6.2

Botnet

  • Office04

C2

  • 193.8.215.36:14447

Mutex

  • c309e0cd-1863-44ff-9d03-abfdcd3f88a5

Attributes
  • encryption_key

    AE82780435B1CCEF85C04A1CA71F0D6403E04CAB

  • install_name

    Client.exe

  • key_salt

    5a23f8394640cb9e40658446a04c0bbae82dc93d0470e1b2a406a90fd2520382

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Pulsar Client Startup

  • subdirectory

    SubDir

Targets

    • Target
      Client-built.exe
    • Size 1.6MB
    • SHA256 0cf3729eed49f719d5fe60b5da523ebc08a90fc7d7e228632811b775a7ee03cf
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    office04defense_evasionquasarspywaretrojanadwarepersistenceransomware

    • Family: Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • Boot or Logon Autostart Execution: Active Setup

      Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

      persistence

    • Checks computer location settings

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

    • Enumerates connected drives

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

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Tasks