Overview

overview

10

Static

static

1

Requiremen...74.vbs

windows10-2004-x64

10

Requiremen...74.vbs

windows11-ltsc_2024-x64

10

Sharing

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General

  • Target
    Requirement_Document_and_Terms_202607217387578464774.zip
  • Size 188KB
  • Sample260724-p4kqfa1anf
  • SHA256 dd31a4892c58a36a57bd56e941fd3870479520cc26aa1042267b22b265e952b3
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
quasaroffice04executionpersistencespywaretrojan

Malware Config

Extracted

Family

  • quasar

Version

  • 1.4.1

Botnet

  • Office04

C2

  • 94.158.245.53:9992

Mutex

  • 4abbc77f-27e2-4983-8fe9-6fafbfb7627b

Attributes
  • encryption_key

    F5CCD6560C6A9C857BE240A8EE0DF9CF88BC3B2B

  • install_name

    Client.exe

  • key_salt

    bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Targets

    • Target
      Requirement Document and Terms 202607217387578464774.vbs
    • Size 443KB
    • SHA256 68a58bec4b4257aca204bfb1284e63337f4917e35477911e27d1c5809e917e96
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    office04executionquasarpersistencespywaretrojan

    • Family: Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • Badlisted process makes network request

      Network request originating from process or tool commonly abused by malware.

    • Downloads MZ/PE file

    • Checks computer location settings

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

    • Registers new Windows logon scripts automatically executed at logon.

      persistence

    • Executes a VBScript file via the Windows Script Host.

      execution
    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Tasks