Overview

overview

10

Static

static

10

Client-built.exe

windows7-x64

10

Client-built.exe

windows10-2004-x64

Sharing

Copy URL Twitter E-mail

General

  • Target
    Client-built.exe
  • Size 3.1MB
  • Sample240729-vk3psstglc
  • SHA256 031b3b1935b0eac9273bafb8b20484be97a1c3f9ea1bb611315042b32168f104
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
quasaroffice04discoveryspywaretrojan

Malware Config

Extracted

Family

  • quasar

Version

  • 1.4.1

Botnet

  • Office04

C2

  • 192.168.1.70:4782

Mutex

  • 34828de8-c350-4dd4-85c9-16051c0443f7

Attributes
  • encryption_key

    2F1B645695C7578786A6BD1B6CD3966DFF24BC11

  • install_name

    sigmaexecutor.exe.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    WIndows Updater

  • subdirectory

    SubDir

Targets

    • Target
      Client-built.exe
    • Size 3.1MB
    • SHA256 031b3b1935b0eac9273bafb8b20484be97a1c3f9ea1bb611315042b32168f104
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    quasaroffice04discoveryspywaretrojan

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • Executes dropped EXE

    • Legitimate hosting services abused for malware hosting/C2

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Tasks