Overview

overview

10

Static

static

10

harlequinbistro.exe

windows10-2004-x64

10

harlequinbistro.exe

windows11-ltsc_2024-x64

10

Sharing

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General

  • Target
    harlequinbistro.exe
  • Size 3.1MB
  • Sample260724-qwa2ps1ene
  • SHA256 429dfba79bdb364e76c0bbcea88cb7d41ce749243a76f12f33e96d8ba09f9981
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
quasarharlequinbistrodiscoveryexecutionspywaretrojan

Malware Config

Extracted

Family

  • quasar

Version

  • 1.4.1

Botnet

  • harlequinbistro

C2

  • harlequinbistro.co.uk:443

  • fb88com.cx:443

  • www.harlequinbistro.co.uk:443

  • 104.18.4.143:443

Mutex

  • 67713974-7818-40a8-bd13-efd8530caf9d

Attributes
  • encryption_key

    239ECC85C91C3110CB08E82C11B57BB8B6AD4392

  • install_name

    connect-to-nox-harlequinbistro.exe

  • key_salt

    bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Targets

    • Target
      harlequinbistro.exe
    • Size 3.1MB
    • SHA256 429dfba79bdb364e76c0bbcea88cb7d41ce749243a76f12f33e96d8ba09f9981
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    harlequinbistrodiscoveryexecutionquasarspywaretrojan

    • Family: Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • Checks computer location settings

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

    • Executes dropped EXE

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Tasks